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04/29/2022 – Ephemeris – Previewing the skies of May 2022

April 29, 2022 Comments off

This is Bob Moler with Ephemeris for Arbor Day, Friday, April 29th. Today the Sun will be up for 14 hours and 9 minutes, setting at 8:45, and it will rise tomorrow at 6:34. The Moon, 1 day before new, will rise at 6:36 tomorrow morning.

Let’s look at the month of May’s skies. Daylight hours in the Interlochen/Traverse City area will increase from 14 hours and 15 minutes this Sunday the 1st to 15 hours 19 minutes on May 31st. The altitude, or angle, of the Sun above the southern horizon at local noon will ascend from 60 degrees Sunday to 67 degrees at month’s end. The altitude of the Sun in the Straits area will be a degree lower than that but your length of daylight will be a few minutes longer. Local apparent noon this month, when the Sun passes due south, will be about 1:38 p.m. The Eta Aquariid meteor shower will reach its peak about 3 a.m. on the 5th. The big event this month will be a total eclipse of the Moon starting late Sunday evening the 15th.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). They may be different for your location.

Addendum

May Evening Star Chart

May 2022 Evening Star Chart

Star Chart for May 2022 (11 p.m. EDT May 15, 2022). Click on image to enlarge. Created using my LookingUp program. Click on image to enlarge. Created using my LookingUp program.

The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 4 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.
Note the chart times of 11 p.m. and 4 a.m. are for the 15th. For each week before the 15th add ½ hour (28 minutes if you’re picky). For each week after the 15th subtract ½ hour, or 28 minutes. The planet positions are updated each Wednesday on this blog. For planet positions on dates other than the 15th, check the Wednesday planet posts on this blog for weekly positions.

May Morning Star Chart

Star Chart May 2022 Morning

Star Chart for May mornings, 2022 (4 a.m. EDT, May 15, 2022). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky dipper drips on Leo
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, and
  • Extend like a spike to Spica,
  • EaqR is the radiant of the Eta Aquariid meteor shower that peaks on the 6th.

Twilight Limits, Nautical and Astronomical

EDT
Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-05-01 4h40m 5h24m 22h02m 22h47m 22h47m 1h35m 0.67
2021-05-02 4h38m 5h23m 22h04m 22h49m 22h49m 2h32m 0.57
2021-05-03 4h36m 5h21m 22h05m 22h51m 22h51m 3h17m 0.46
2021-05-04 4h33m 5h19m 22h07m 22h53m 22h53m 3h52m 0.36
2021-05-05 4h31m 5h17m 22h09m 22h55m 22h55m 4h20m 0.27
2021-05-06 4h29m 5h16m 22h10m 22h57m 22h57m 4h29m 0.18
2021-05-07 4h27m 5h14m 22h12m 22h59m 22h59m 4h27m 0.11
2021-05-08 4h25m 5h12m 22h13m 23h01m 23h01m 4h25m 0.06
2021-05-09 4h23m 5h11m 22h15m 23h03m 23h03m 4h23m 0.02
2021-05-10 4h21m 5h09m 22h16m 23h05m 23h05m 4h21m 0
2021-05-11 4h19m 5h07m 22h18m 23h07m 23h07m 4h19m 0
2021-05-12 4h17m 5h06m 22h19m 23h09m 23h09m 4h17m 0.02
2021-05-13 4h15m 5h04m 22h21m 23h11m 23h11m 4h15m 0.05
2021-05-14 4h13m 5h03m 22h23m 23h13m 4h13m 0.1
2021-05-15 4h11m 5h01m 22h24m 23h15m 0h07m 4h11m 0.17
2021-05-16 4h09m 5h00m 22h26m 23h17m 1h00m 4h09m 0.25
2021-05-17 4h07m 4h58m 22h27m 23h19m 1h46m 4h07m 0.34
2021-05-18 4h05m 4h57m 22h28m 23h21m 2h25m 4h05m 0.44
2021-05-19 4h03m 4h56m 22h30m 23h23m 2h58m 4h03m 0.54
2021-05-20 4h01m 4h54m 22h31m 23h24m 3h26m 4h01m 0.65
2021-05-21 4h00m 4h53m 22h33m 23h26m 3h51m 4h00m 0.76
2021-05-22 3h58m 4h52m 22h34m 23h28m 0.85
2021-05-23 3h56m 4h51m 22h36m 23h30m 0.92
2021-05-24 3h54m 4h49m 22h37m 23h32m 0.98
2021-05-25 3h53m 4h48m 22h38m 23h34m 1
2021-05-26 3h51m 4h47m 22h40m 23h36m 0.99
2021-05-27 3h49m 4h46m 22h41m 23h38m 0.95
2021-05-28 3h48m 4h45m 22h42m 23h39m 23h39m 0.89
2021-05-29 3h46m 4h44m 22h43m 23h41m 23h41m 0h19m 0.81
2021-05-30 3h45m 4h43m 22h45m 23h43m 23h43m 1h11m 0.72
2021-05-31 3h44m 4h42m 22h46m 23h44m 23h44m 1h52m 0.61

The twilight calendar was generated using Cartes du Ciel (Sky Charts), with some corrections.

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

    Date     Time     Event
May  1  Su            Venus: 42.4° W
     1  Su   3:52 pm  Moon Ascending Node
     2  Mo  10:17 am  Moon-Mercury: 2° N
     5  Th   4:57 am  Uranus Conjunction
     5  Th   8:46 am  Moon Apogee: 405300 km
     5  Th  11:55 am  Moon North Dec.: 27° N
     6  Fr   4:00 am  Eta Aquarid Shower: ZHR = 60
     6  Fr   6:56 pm  Moon-Pollux: 2.3° N
     7  Sa   8:23 pm  Moon-Beehive: 4° S
     8  Su   8:21 pm  First Quarter
    15  Su   7:44 pm  Moon Descending Node
    16  Mo  12:11 am  Total Lunar Eclipse
    16  Mo  12:14 am  Full Flower Moon
    17  Tu  11:23 am  Moon Perigee: 360300 km
    18  We   9:21 pm  Moon South Dec.: 27° S
    21  Sa   3:14 pm  Mercury Inferior Conj.
    22  Su  12:43 am  Moon-Saturn: 4.6° N
    22  Su   2:43 pm  Last Quarter
    24  Tu   3:24 pm  Moon-Mars: 2.9° N
    24  Tu   7:59 pm  Moon-Jupiter: 3.4° N
    26  Th  10:52 pm  Moon-Venus: 0.2° N
    28  Sa  10:33 pm  Moon Ascending Node
    29  Su   4:57 am  Mars-Jupiter: 0.6° N
    30  Mo   7:30 am  New Moon
Jun  1  We            Venus: 36.5° W

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

Sun and Moon Rising and Setting Events

     LU                  Ephemeris of Sky Events for Interlochen/TC
May, 2022    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun  1| 06:32a  08:47p  14:15 | 10:00p  05:20a |      Set  09:56p    1%|
|Mon  2| 06:31a  08:49p  14:17 | 10:01p  05:18a |      Set  11:02p    4%|
|Tue  3| 06:29a  08:50p  14:20 | 10:03p  05:17a |      Set  12:05a    9%|
|Wed  4| 06:28a  08:51p  14:23 | 10:04p  05:15a |      Set  01:03a   15%|
|Thu  5| 06:27a  08:52p  14:25 | 10:06p  05:13a |      Set  01:53a   23%|
|Fri  6| 06:25a  08:53p  14:28 | 10:08p  05:11a |      Set  02:35a   31%|
|Sat  7| 06:24a  08:55p  14:30 | 10:09p  05:10a |      Set  03:10a   40%|
+------+-----------------------+----------------+-----------------------+
|Sun  8| 06:23a  08:56p  14:33 | 10:11p  05:08a |F Qtr Set  03:39a   50%|
|Mon  9| 06:21a  08:57p  14:35 | 10:12p  05:06a |      Set  04:03a   60%|
|Tue 10| 06:20a  08:58p  14:38 | 10:14p  05:05a |      Set  04:25a   69%|
|Wed 11| 06:19a  08:59p  14:40 | 10:15p  05:03a |      Set  04:45a   79%|
|Thu 12| 06:18a  09:01p  14:43 | 10:17p  05:02a |      Set  05:06a   87%|
|Fri 13| 06:16a  09:02p  14:45 | 10:18p  05:00a |      Set  05:28a   93%|
|Sat 14| 06:15a  09:03p  14:47 | 10:20p  04:59a |      Set  05:53a   98%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 06:14a  09:04p  14:49 | 10:21p  04:57a |      Set  06:25a  100%|
|Mon 16| 06:13a  09:05p  14:52 | 10:23p  04:56a |Full  Rise 10:13p   99%|
|Tue 17| 06:12a  09:06p  14:54 | 10:24p  04:54a |      Rise 11:33p   95%|
|Wed 18| 06:11a  09:07p  14:56 | 10:26p  04:53a |      Rise 12:43a   89%|
|Thu 19| 06:10a  09:08p  14:58 | 10:27p  04:51a |      Rise 01:40a   80%|
|Fri 20| 06:09a  09:09p  15:00 | 10:29p  04:50a |      Rise 02:23a   70%|
|Sat 21| 06:08a  09:11p  15:02 | 10:30p  04:49a |      Rise 02:56a   59%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 06:07a  09:12p  15:04 | 10:32p  04:47a |L Qtr Rise 03:22a   48%|
|Mon 23| 06:06a  09:13p  15:06 | 10:33p  04:46a |      Rise 03:44a   37%|
|Tue 24| 06:05a  09:14p  15:08 | 10:34p  04:45a |      Rise 04:03a   27%|
|Wed 25| 06:05a  09:15p  15:10 | 10:36p  04:44a |      Rise 04:22a   18%|
|Thu 26| 06:04a  09:16p  15:11 | 10:37p  04:43a |      Rise 04:42a   11%|
|Fri 27| 06:03a  09:16p  15:13 | 10:38p  04:42a |      Rise 05:03a    6%|
|Sat 28| 06:02a  09:17p  15:15 | 10:39p  04:41a |      Rise 05:27a    2%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 06:02a  09:18p  15:16 | 10:41p  04:40a |      Rise 05:56a    0%|
|Mon 30| 06:01a  09:19p  15:18 | 10:42p  04:39a |New   Set  09:56p    0%|
|Tue 31| 06:00a  09:20p  15:19 | 10:43p  04:38a |      Set  10:56p    2%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.

03/31/2022 – Ephemeris – Previewing April Skies

March 31, 2022 Comments off

This is Ephemeris for Thursday, March 31st. Today the Sun will be up for 12 hours and 43 minutes, setting at 8:09, and it will rise tomorrow at 7:23. The Moon, 1 day before new, will rise at 7:51 tomorrow morning.

The 4th month of the year begins tomorrow. Daylight hours in the Interlochen/Traverse City area will increase from 12 hours and 46 minutes tomorrow to 14 hours and 12 minutes on April 30th. The altitude, or angle, of the Sun above the southern horizon at local noon will be 50 degrees tomorrow and will ascend to 60 degrees on April 30th. The altitude of the Sun in the Straits area will be a degree lower, but their daylight hours will be a bit longer. The actual time of local apparent noon, when the Sun passes due south, will be about 1:43 p.m. The Lyrid meteor shower will reach its peak on the afternoon of the 22nd. So the hours from 10 pm and 3am on the 21st and 22nd will be the best time to see them in dark skies.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). They may be different for your location.

Addendum

April Evening Star Chart

April 2022 Evening Star Chart

Star Chart for April 2022 (10 p.m. EDT, April 15, 2022). Click on image to enlarge. Created using my LookingUp program. Click on image to enlarge. Created using my LookingUp program.

April Morning Star Chart

Star Chart April 2022 Morning

Star Chart for April mornings, 2022 (5 a.m. EDT, April 15, 2022). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations, click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • The leaky bowl of the Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, then
  • Follow the spike to Spica.
  • The Summer Triangle appears in red.
  • LyrR is the radiant of the Lyrid meteor shower, which will reach peak on the afternoon of the 22nd.

Twilight Limits, Nautical and Astronomical

      EDT        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-04-01 5h46m 6h23m 21h18m 21h54m 21h54m 0h11m 0.74
2021-04-02 5h44m 6h21m 21h19m 21h56m 21h56m 1h29m 0.64
2021-04-03 5h42m 6h19m 21h20m 21h57m 21h57m 2h42m 0.52
2021-04-04 5h39m 6h17m 21h22m 21h59m 21h59m 3h44m 0.42
2021-04-05 5h37m 6h15m 21h23m 22h01m 22h01m 4h35m 0.31
2021-04-06 5h35m 6h13m 21h25m 22h02m 22h02m 5h16m 0.22
2021-04-07 5h33m 6h11m 21h26m 22h04m 22h04m 5h33m 0.14
2021-04-08 5h31m 6h09m 21h27m 22h05m 22h05m 5h31m 0.08
2021-04-09 5h28m 6h07m 21h29m 22h07m 22h07m 5h28m 0.03
2021-04-10 5h26m 6h05m 21h30m 22h09m 22h09m 5h26m 0.01
2021-04-11 5h24m 6h03m 21h32m 22h10m 22h10m 5h24m 0
2021-04-12 5h22m 6h01m 21h33m 22h12m 22h12m 5h22m 0.01
2021-04-13 5h20m 5h59m 21h35m 22h14m 22h14m 5h20m 0.04
2021-04-14 5h17m 5h57m 21h36m 22h16m 23h12m 5h17m 0.08
2021-04-15 5h15m 5h55m 21h38m 22h17m 5h15m 0.14
2021-04-16 5h13m 5h53m 21h39m 22h19m 0h14m 5h13m 0.22
2021-04-17 5h11m 5h51m 21h41m 22h21m 1h15m 5h11m 0.3
2021-04-18 5h09m 5h49m 21h42m 22h23m 2h12m 5h09m 0.39
2021-04-19 5h06m 5h47m 21h44m 22h24m 3h03m 5h06m 0.49
2021-04-20 5h04m 5h45m 21h45m 22h26m 3h47m 5h04m 0.59
2021-04-21 5h02m 5h43m 21h47m 22h28m 4h25m 5h02m 0.7
2021-04-22 5h00m 5h41m 21h48m 22h30m 4h56m 5h00m 0.79
2021-04-23 4h57m 5h39m 21h50m 22h32m 0.88
2021-04-24 4h55m 5h37m 21h51m 22h34m 0.94
2021-04-25 4h53m 5h35m 21h53m 22h35m 0.99
2021-04-26 4h51m 5h34m 21h55m 22h37m 1
2021-04-27 4h49m 5h32m 21h56m 22h39m 0.98
2021-04-28 4h46m 5h30m 21h58m 22h41m 22h41m 23h06m 0.94
2021-04-29 4h44m 5h28m 21h59m 22h43m 22h43m 0.87
2021-04-30 4h42m 5h26m 22h01m 22h45m 22h45m 0h25m 0.78

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

   Date     Time      Event
Apr  1  Fr            Venus: 46.1° W
     1  Fr   2:24 am  New Moon
     2  Sa   7:05 pm  Mercury Superior Conj.
     4  Mo   9:05 am  Moon Ascending Node
     4  Mo   9:16 pm  Moon-Pleiades: 4° N
     4  Mo   9:45 pm  Mars-Saturn: 0.3° N
     7  Th   3:11 pm  Moon Apogee: 404400 km
     8  Fr   4:15 am  Moon North Dec.: 26.9° N
     9  Sa   2:48 am  First Quarter
     9  Sa  11:14 am  Moon-Pollux: 2.4° N
    10  Su  12:27 pm  Moon-Beehive: 3.9° S
    16  Sa   2:55 pm  Full Pink Moon
    18  Mo  10:01 am  Moon Descending Node
    19  Tu  11:16 am  Moon Perigee: 365100 km
    21  Th   1:41 pm  Moon South Dec.: 26.9° S
    22  Fr   2:25 pm  Lyrid Shower: ZHR = 20
    23  Sa   7:56 am  Last Quarter
    24  Su   4:56 pm  Moon-Saturn: 4.6° N
    25  Mo   6:06 pm  Moon-Mars: 4.1° N
    26  Tu   9:51 pm  Moon-Venus: 4° N
    27  We   4:23 am  Moon-Jupiter: 3.8° N
    29  Fr   3:59 am  Mercury Elongation: 20.6° E
    29  Fr   3:29 pm  Mercury-Pleiades: 1.4° S
    30  Sa   3:56 pm  Venus-Jupiter: 0.2° N
    30  Sa   4:28 pm  New Moon
    30  Sa   4:42 pm  Partial Solar Eclipse (South Pacific and
Southern South America) May 1 Su Venus: 42.4° W

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

Sun and Moon Rising and Setting Events

     LU                  Ephemeris of Sky Events for Interlochen/TC
April, 2022    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Fri  1| 07:23a  08:10p  12:46 | 09:15p  06:18a |New   Set  08:47p    1%|
|Sat  2| 07:21a  08:11p  12:50 | 09:16p  06:16a |      Set  09:55p    3%|
+------+-----------------------+----------------+-----------------------+
|Sun  3| 07:19a  08:12p  12:53 | 09:18p  06:14a |      Set  11:03p    8%|
|Mon  4| 07:18a  08:14p  12:56 | 09:19p  06:13a |      Set  12:10a   14%|
|Tue  5| 07:16a  08:15p  12:59 | 09:20p  06:11a |      Set  01:15a   21%|
|Wed  6| 07:14a  08:16p  13:02 | 09:22p  06:09a |      Set  02:16a   29%|
|Thu  7| 07:12a  08:17p  13:05 | 09:23p  06:07a |      Set  03:11a   38%|
|Fri  8| 07:10a  08:19p  13:08 | 09:25p  06:05a |      Set  03:58a   47%|
|Sat  9| 07:09a  08:20p  13:11 | 09:26p  06:03a |F Qtr Set  04:37a   57%|
+------+-----------------------+----------------+-----------------------+
|Sun 10| 07:07a  08:21p  13:14 | 09:28p  06:01a |      Set  05:10a   66%|
|Mon 11| 07:05a  08:22p  13:17 | 09:29p  05:59a |      Set  05:37a   75%|
|Tue 12| 07:03a  08:24p  13:20 | 09:31p  05:57a |      Set  06:01a   83%|
|Wed 13| 07:01a  08:25p  13:23 | 09:32p  05:55a |      Set  06:22a   90%|
|Thu 14| 07:00a  08:26p  13:26 | 09:34p  05:53a |      Set  06:43a   96%|
|Fri 15| 06:58a  08:27p  13:29 | 09:35p  05:51a |      Set  07:04a   99%|
|Sat 16| 06:56a  08:29p  13:32 | 09:37p  05:49a |Full  Rise 08:36p  100%|
+------+-----------------------+----------------+-----------------------+
|Sun 17| 06:55a  08:30p  13:35 | 09:38p  05:47a |      Rise 09:56p   98%|
|Mon 18| 06:53a  08:31p  13:38 | 09:40p  05:45a |      Rise 11:17p   93%|
|Tue 19| 06:51a  08:32p  13:41 | 09:41p  05:43a |      Rise 12:37a   86%|
|Wed 20| 06:49a  08:34p  13:44 | 09:43p  05:41a |      Rise 01:51a   77%|
|Thu 21| 06:48a  08:35p  13:47 | 09:44p  05:39a |      Rise 02:54a   67%|
|Fri 22| 06:46a  08:36p  13:50 | 09:46p  05:37a |      Rise 03:43a   56%|
|Sat 23| 06:45a  08:37p  13:52 | 09:47p  05:35a |L Qtr Rise 04:22a   44%|
+------+-----------------------+----------------+-----------------------+
|Sun 24| 06:43a  08:39p  13:55 | 09:49p  05:33a |      Rise 04:52a   33%|
|Mon 25| 06:41a  08:40p  13:58 | 09:50p  05:31a |      Rise 05:16a   24%|
|Tue 26| 06:40a  08:41p  14:01 | 09:52p  05:29a |      Rise 05:37a   15%|
|Wed 27| 06:38a  08:42p  14:04 | 09:53p  05:28a |      Rise 05:56a    8%|
|Thu 28| 06:37a  08:44p  14:06 | 09:55p  05:26a |      Rise 06:16a    4%|
|Fri 29| 06:35a  08:45p  14:09 | 09:57p  05:24a |      Rise 06:36a    1%|
|Sat 30| 06:34a  08:46p  14:12 | 09:58p  05:22a |New   Set  08:49p    0%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.

03/01/2022 – Ephemeris – Previewing March skies

March 1, 2022 Comments off

This is Ephemeris for Fat Tuesday, March 1st. Today the Sun will be up for 11 hours and 10 minutes, setting at 6:30, and it will rise tomorrow at 7:18. The Moon, 1 day before new, will rise at 7:44 tomorrow morning.

Let’s look at the skies for the month of March. The Sun will cross the celestial equator in March as the promising season of spring will begin. Daylight hours in the Interlochen/Traverse City area and will increase from 11 hours and 10 minutes today to 12 hours 43 minutes on the 31st. The altitude, or angle, of the Sun above the southern horizon at local noon will be just under 38 degrees today and will ascend to nearly 50 degrees on the 31st. The altitude of the Sun in the Straits area will be a degree lower. Local apparent noon this month, when the Sun passes due south, will be about 12:51 p.m. and an hour later when Daylight Saving Time starts on the 13th. Spring will begin on the 20th at 11:33 am.

Addendum

March Evening Star Chart

March Evening Star Chart

Star Chart for March 2022 (10 pm EDT, March 15, 2022). Click on the image to enlarge it. Created using my LookingUp program.

The planets and stars are plotted for the 15th at 10 p.m. EDT in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian. (An hour and 45 minutes behind our Daylight Saving Time meridian during EDT). To duplicate the star positions on a planisphere (rotating star finder) you may have to set it to 45 minutes or 1 hour 45 minutes earlier than your current time.

Note the chart times of 10 p.m. and 6 a.m. are for the 15th. For each week before the 15th, add ½ hour (28 minutes if you’re picky). For each week after the 15th, subtract ½ hour. For planet positions on dates other than the 15th, check the Wednesday planet posts on this blog.

March Morning Star Chart

March Morning Star Chart

Star Chart for March mornings, 2022 (6 a.m. EDT March 15, 2022). Click on image to enlarge. Created using my LookingUp program.

Only Venus of all the morning planets has yet to rise at chart time on the 15th.

For a list of constellation names to go with the abbreviations click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • The leaky bowl of the Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, and
  • Extend it as a spike to Spica.
  • The Summer Triangle appears in red.

Twilight Limits, Nautical and Astronomical

EST/EDT
Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2022-03-01 5h44m 6h18m 19h32m 20h06m 20h06m 5h44m 0
2022-03-02 5h42m 6h16m 19h33m 20h07m 20h07m 5h42m 0
2022-03-03 5h40m 6h14m 19h35m 20h09m 20h09m 5h40m 0.03
2022-03-04 5h39m 6h13m 19h36m 20h10m 20h57m 5h39m 0.07
2022-03-05 5h37m 6h11m 19h37m 20h11m 22h06m 5h37m 0.13
2022-03-06 5h35m 6h09m 19h39m 20h13m 23h13m 5h35m 0.21
2022-03-07 5h33m 6h07m 19h40m 20h14m 5h33m 0.29
2022-03-08 5h31m 6h05m 19h41m 20h15m 0h20m 5h31m 0.38
2022-03-09 5h30m 6h04m 19h43m 20h17m 1h25m 5h30m 0.48
2022-03-10 5h28m 6h02m 19h44m 20h18m 2h28m 5h28m 0.57
2022-03-11 5h26m 6h00m 19h45m 20h19m 3h26m 5h26m 0.66
2022-03-12 5h24m 5h58m 19h46m 20h21m 4h18m 5h24m 0.75
2022-03-13 6h22m 6h56m 20h48m 21h22m 6h03m 6h22m 0.83
2022-03-14 6h20m 6h54m 20h49m 21h24m 0.9
2022-03-15 6h18m 6h53m 20h50m 21h25m 0.95
2022-03-16 6h16m 6h51m 20h52m 21h26m 0.99
2022-03-17 6h14m 6h49m 20h53m 21h28m 1
2022-03-18 6h12m 6h47m 20h54m 21h29m 0.99
2022-03-19 6h10m 6h45m 20h56m 21h31m 21h31m 21h42m 0.96
2022-03-20 6h12m 6h47m 21h01m 21h36m 21h36m 22h58m 0.9
2022-03-21 6h10m 6h45m 21h02m 21h37m 21h37m 0.82
2022-03-22 6h08m 6h43m 21h04m 21h39m 21h39m 0h15m 0.73
2022-03-23 6h06m 6h41m 21h05m 21h40m 21h40m 1h34m 0.62
2022-03-24 6h04m 6h39m 21h06m 21h42m 21h42m 2h50m 0.5
2022-03-25 6h02m 6h37m 21h08m 21h43m 21h43m 3h59m 0.39
2022-03-26 6h00m 6h35m 21h09m 21h45m 21h45m 4h57m 0.28
2022-03-27 5h58m 6h33m 21h10m 21h46m 21h46m 5h43m 0.19
2022-03-28 5h55m 6h31m 21h12m 21h48m 21h48m 5h55m 0.11
2022-03-29 5h53m 6h29m 21h13m 21h49m 21h49m 5h53m 0.05
2022-03-30 5h51m 6h27m 21h15m 21h51m 21h51m 5h51m 0.01
2022-03-31 5h49m 6h25m 21h16m 21h52m 21h52m 5h49m 0

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2019/09/27/

NASA Calendar of Planetary Events

     Date    Time     Event
Mar  1  Tu            Venus: 45° W
     2  We  10:48 am  Mercury-Saturn: 0.7° N
     2  We  12:35 pm  New Moon
     5  Sa   7:51 am  Jupiter Solar Conjunction
     8  Tu   3:22 am  Moon Ascending Node
    10  Th   5:45 am  First Quarter
    10  Th   6:05 pm  Moon Apogee: 404,300 km
    11  Fr   7:14 pm  Moon Northernmost Declination: 26.7° N
    13  Su   1:58 am  Moon-Pollux: 2.6° N
    13  Su   6:08 am  Neptune Solar Conjunction
    14  Mo   3:55 am  Moon-Beehive: 3.7° S
    15  Tu  11:12 pm  Venus-Mars: 3.9° N
    18  Fr   3:17 am  Full Worm Moon
    20  Su   5:59 am  Venus Elongation: 46.6° West
    20  Su  11:33 am  Vernal Equinox
    22  Tu   4:12 am  Moon Descending Node
    23  We   7:28 pm  Moon Perigee: 369,800 km
    25  Fr   1:37 am  Last Quarter
    25  Fr   7:58 am  Moon Southernmost Declination: 26.8° S
    27  Su  10:54 pm  Moon-Mars: 4.2° N
    28  Mo   5:50 am  Moon-Venus: 6.9° N
    28  Mo   7:43 am  Moon-Saturn: 4.5° N
    28  Mo   8:53 pm  Venus-Saturn: 2.1° N
Apr  1  Fr            Venus: 46.1° W

All event times are given for UTC-5:00: Eastern Standard Time before the 14th or UTC-4:00 Daylight Saving Time thereafter.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html

If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.

Note that the site is now kept up for archival purposes. Fred Espenak retired from NASA several years ago and has his own site, AstroPixels, which contain the same information: http://astropixels.com/almanac/almanac.html.

Sun and Moon Rising and Setting Events

LU             Ephemeris of Sky Events for Interlochen/TC
March, 2022    Local time zone: EST
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Tue  1| 07:20a  06:30p  11:10 | 07:33p  06:17a |      Rise 07:44a    1%|
|Wed  2| 07:18a  06:31p  11:13 | 07:35p  06:15a |New   Set  06:32p    0%|
|Thu  3| 07:16a  06:33p  11:16 | 07:36p  06:13a |      Set  07:46p    2%|
|Fri  4| 07:15a  06:34p  11:19 | 07:37p  06:12a |      Set  08:56p    6%|
|Sat  5| 07:13a  06:35p  11:22 | 07:39p  06:10a |      Set  10:05p   12%|
+------+-----------------------+----------------+-----------------------+
|Sun  6| 07:11a  06:37p  11:25 | 07:40p  06:08a |      Set  11:13p   19%|
|Mon  7| 07:09a  06:38p  11:28 | 07:41p  06:06a |      Set  12:19a   27%|
|Tue  8| 07:07a  06:39p  11:32 | 07:42p  06:04a |      Set  01:25a   36%|
|Wed  9| 07:06a  06:41p  11:35 | 07:44p  06:03a |      Set  02:28a   46%|
|Thu 10| 07:04a  06:42p  11:38 | 07:45p  06:01a |F Qtr Set  03:26a   55%|
|Fri 11| 07:02a  06:43p  11:41 | 07:46p  05:59a |      Set  04:18a   64%|
|Sat 12| 07:00a  06:45p  11:44 | 07:48p  05:57a |      Set  05:02a   73%|
+------+-----------------------+----------------+-----------------------+
| EDT  |      Time Change      |                |                       |
|Sun 13| 07:58a  07:46p  11:47 | 08:49p  06:55a |      Set  06:39a   81%|
|Mon 14| 07:56a  07:47p  11:50 | 08:50p  06:53a |      Set  07:10a   88%|
|Tue 15| 07:55a  07:49p  11:53 | 08:52p  06:52a |      Set  07:36a   94%|
|Wed 16| 07:53a  07:50p  11:57 | 08:53p  06:50a |      Set  07:59a   98%|
|Thu 17| 07:51a  07:51p  12:00 | 08:54p  06:48a |      Set  08:20a  100%|
|Fri 18| 07:49a  07:52p  12:03 | 08:56p  06:46a |Full  Rise 08:28p   99%|
|Sat 19| 07:47a  07:54p  12:06 | 08:57p  06:44a |      Rise 09:42p   96%|
+------+-----------------------+----------------+-----------------------+
|Sun 20| 07:45a  07:55p  12:09 | 08:58p  06:42a |      Rise 10:57p   91%|
|Mon 21| 07:43a  07:56p  12:12 | 09:00p  06:40a |      Rise 12:15a   84%|
|Tue 22| 07:42a  07:57p  12:15 | 09:01p  06:38a |      Rise 01:34a   75%|
|Wed 23| 07:40a  07:59p  12:18 | 09:02p  06:36a |      Rise 02:50a   64%|
|Thu 24| 07:38a  08:00p  12:22 | 09:04p  06:34a |      Rise 03:59a   53%|
|Fri 25| 07:36a  08:01p  12:25 | 09:05p  06:32a |L Qtr Rise 04:56a   41%|
|Sat 26| 07:34a  08:02p  12:28 | 09:06p  06:30a |      Rise 05:42a   30%|
+------+-----------------------+----------------+-----------------------+
|Sun 27| 07:32a  08:04p  12:31 | 09:08p  06:28a |      Rise 06:18a   21%|
|Mon 28| 07:30a  08:05p  12:34 | 09:09p  06:26a |      Rise 06:47a   12%|
|Tue 29| 07:29a  08:06p  12:37 | 09:11p  06:24a |      Rise 07:10a    6%|
|Wed 30| 07:27a  08:07p  12:40 | 09:12p  06:22a |      Rise 07:31a    2%|
|Thu 31| 07:25a  08:09p  12:43 | 09:13p  06:20a |      Rise 07:51a    0%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Created using my LookingUp for DOS output as text.

02/01/2022 – Ephemeris – Let’s look ahead at our short month of February

February 1, 2022 Comments off

This is Bob Moler with Ephemeris for Tuesday, February 1st. Today the Sun will be up for 9 hours and 49 minutes, setting at 5:51, and it will rise tomorrow at 8:00. The Moon is new today, and won’t be visible.

Let’s look ahead at our short month of February. We’re in the depths of winter, but the Sun is continuing its return to northern climes. This is reflected in the increase in daylight hours, from 9 hours 49 minutes today to 11 hours 7 minutes on the 28th. These times are for the Interlochen/Traverse City area. The duration of daylight is slightly shorter in the northern part of our listening area and slightly longer to the south. As the month goes on, the weather should generally warm and clear up. We will be slowly losing Jupiter from the evening sky this month. Venus is moving away from the Sun and will pass Mars in the morning sky on the 12th. Neither Mercury nor Saturn will be visible this month because they will be lost in the Sun’s glare.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). They may be different for your location.

Addendum

February Evening Star Chart

Star Chart February Evening

Star Chart for February 2022, (9 p.m. EST February 15, 2022). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 9 p.m. EST in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere (rotating star finder) you may have to set it to 1 hour 45 minutes earlier than the current time.

Note the chart times of 9 p.m. and 6 a.m. are for the 15th. For each week before the 15th, add ½ hour (28 minutes if you’re picky). For each week after the 15th, subtract ½ hour. The planet positions are updated each Wednesday on this blog. For planet positions on dates other than the 15th, check the Wednesday planet posts on this blog.

February Morning Star Chart

Star Chart February Morning

Star Chart for February mornings, 2022 (6 a.m. EST February 15, 2022). Created using my LookingUp program. Click on image to enlarge.

For a list of constellation names to go with the abbreviations, click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, and
  • Extend like a spike to Spica,
  • The Summer Triangle is in red.

Twilight Limits, Nautical and Astronomical

      EST        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2022-02-01 6h22m 6h56m 18h56m 19h30m 19h30m 6h22m 0.01
2022-02-02 6h21m 6h55m 18h57m 19h31m 19h43m 6h21m 0.05
2022-02-03 6h20m 6h54m 18h59m 19h33m 20h57m 6h20m 0.11
2022-02-04 6h19m 6h53m 19h00m 19h34m 22h08m 6h19m 0.19
2022-02-05 6h18m 6h52m 19h01m 19h35m 23h17m 6h18m 0.28
2022-02-06 6h17m 6h51m 19h02m 19h36m 6h17m 0.37
2022-02-07 6h16m 6h50m 19h04m 19h38m 0h23m 6h16m 0.47
2022-02-08 6h15m 6h49m 19h05m 19h39m 1h29m 6h15m 0.56
2022-02-09 6h13m 6h47m 19h06m 19h40m 2h34m 6h13m 0.65
2022-02-10 6h12m 6h46m 19h08m 19h41m 3h38m 6h12m 0.74
2022-02-11 6h11m 6h45m 19h09m 19h43m 4h39m 6h11m 0.82
2022-02-12 6h10m 6h43m 19h10m 19h44m 5h35m 6h10m 0.89
2022-02-13 6h08m 6h42m 19h11m 19h45m 0.94
2022-02-14 6h07m 6h41m 19h13m 19h47m 0.98
2022-02-15 6h06m 6h39m 19h14m 19h48m 1
2022-02-16 6h04m 6h38m 19h15m 19h49m 1
2022-02-17 6h03m 6h37m 19h17m 19h50m 0.98
2022-02-18 6h01m 6h35m 19h18m 19h52m 19h52m 20h32m 0.93
2022-02-19 6h00m 6h34m 19h19m 19h53m 19h53m 21h43m 0.87
2022-02-20 5h58m 6h32m 19h20m 19h54m 19h54m 22h55m 0.79
2022-02-21 5h57m 6h31m 19h22m 19h55m 19h55m 0.69
2022-02-22 5h55m 6h29m 19h23m 19h57m 19h57m 0h10m 0.58
2022-02-23 5h54m 6h28m 19h24m 19h58m 19h58m 1h26m 0.47
2022-02-24 5h52m 6h26m 19h26m 19h59m 19h59m 2h43m 0.36
2022-02-25 5h51m 6h24m 19h27m 20h01m 20h01m 3h58m 0.25
2022-02-26 5h49m 6h23m 19h28m 20h02m 20h02m 5h04m 0.16
2022-02-27 5h47m 6h21m 19h30m 20h03m 20h03m 5h47m 0.08
2022-02-28 5h46m 6h19m 19h31m 20h05m 20h05m 5h46m 0.03

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2019/09/27/

NASA Calendar of Planetary Events

Date         Time     Event
Feb  1  Tu            Venus: 32° W
     1  Tu  12:46 am  New Moon 
2 We 4:08 pm Moon-Jupiter: 4.4° N 4 Fr 1:34 pm Saturn Solar Conjunction 8 Tu 8:50 am First Quarter 9 We 1:12 am Moon Ascending Node 10 Th 9:39 pm Moon Apogee: 404,900 km 12 Sa 11:45 am Moon North Dec.: 26.4° N 12 Sa 8:00 pm Venus-Mars: 6.6° N 13 Su 5:52 pm Moon-Pollux: 2.8° N 13 Su Venus greatest brilliancy 14 Mo 6:42 pm Moon-Beehive: 3.5° S 16 We 11:57 am Full Snow Moon 16 We 3:59 pm Mercury Elongation: 26.3° West 23 We 1:54 am Moon Descending Node 23 We 5:32 pm Last Quarter 26 Sa 1:37 am Moon South Dec.: 26.6° S 26 Sa 5:18 pm Moon Perigee: 367,800 km 27 Su 4:00 am Moon-Mars: 3.5° N 28 Mo 3:07 pm Moon-Mercury: 3.8° N 28 Mo 6:47 pm Moon-Saturn: 4.3° N Mar 1 Tu Venus: 45° W

All event times are given for UTC-5:00: Eastern Standard or Daylight Time

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html

If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU           Ephemeris of Sky Events for Interlochen/TC
February, 2022    Local time zone: EST
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Tue  1| 08:01a  05:51p  09:49 | 06:57p  06:55a |New   Set  06:23p    1%|
|Wed  2| 08:00a  05:52p  09:52 | 06:58p  06:54a |      Set  07:42p    4%|
|Thu  3| 07:59a  05:54p  09:54 | 07:00p  06:53a |      Set  08:57p   10%|
|Fri  4| 07:58a  05:55p  09:57 | 07:01p  06:52a |      Set  10:08p   17%|
|Sat  5| 07:56a  05:57p  10:00 | 07:02p  06:51a |      Set  11:16p   26%|
+------+-----------------------+----------------+-----------------------+
|Sun  6| 07:55a  05:58p  10:03 | 07:04p  06:50a |      Set  12:23a   35%|
|Mon  7| 07:54a  06:00p  10:05 | 07:05p  06:49a |      Set  01:29a   44%|
|Tue  8| 07:53a  06:01p  10:08 | 07:06p  06:48a |F Qtr Set  02:34a   54%|
|Wed  9| 07:51a  06:02p  10:11 | 07:07p  06:46a |      Set  03:37a   63%|
|Thu 10| 07:50a  06:04p  10:14 | 07:09p  06:45a |      Set  04:38a   72%|
|Fri 11| 07:48a  06:05p  10:16 | 07:10p  06:44a |      Set  05:34a   80%|
|Sat 12| 07:47a  06:07p  10:19 | 07:11p  06:42a |      Set  06:24a   87%|
+------+-----------------------+----------------+-----------------------+
|Sun 13| 07:46a  06:08p  10:22 | 07:13p  06:41a |      Set  07:05a   93%|
|Mon 14| 07:44a  06:10p  10:25 | 07:14p  06:40a |      Set  07:40a   97%|
|Tue 15| 07:43a  06:11p  10:28 | 07:15p  06:38a |      Set  08:09a   99%|
|Wed 16| 07:41a  06:12p  10:31 | 07:16p  06:37a |Full  Rise 06:11p  100%|
|Thu 17| 07:39a  06:14p  10:34 | 07:18p  06:36a |      Rise 07:21p   98%|
|Fri 18| 07:38a  06:15p  10:37 | 07:19p  06:34a |      Rise 08:32p   94%|
|Sat 19| 07:36a  06:17p  10:40 | 07:20p  06:33a |      Rise 09:42p   88%|
+------+-----------------------+----------------+-----------------------+
|Sun 20| 07:35a  06:18p  10:43 | 07:22p  06:31a |      Rise 10:55p   81%|
|Mon 21| 07:33a  06:19p  10:46 | 07:23p  06:30a |      Rise 12:09a   71%|
|Tue 22| 07:32a  06:21p  10:49 | 07:24p  06:28a |      Rise 01:26a   61%|
|Wed 23| 07:30a  06:22p  10:52 | 07:26p  06:26a |L Qtr Rise 02:43a   49%|
|Thu 24| 07:28a  06:23p  10:55 | 07:27p  06:25a |      Rise 03:57a   38%|
|Fri 25| 07:27a  06:25p  10:58 | 07:28p  06:23a |      Rise 05:04a   27%|
|Sat 26| 07:25a  06:26p  11:01 | 07:29p  06:22a |      Rise 05:59a   18%|
+------+-----------------------+----------------+-----------------------+
|Sun 27| 07:23a  06:27p  11:04 | 07:31p  06:20a |      Rise 06:43a   10%|
|Mon 28| 07:21a  06:29p  11:07 | 07:32p  06:18a |      Rise 07:17a    4%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Created using my LookingUp for DOS output as HTML.

12/31/2021 – Ephemeris – January 2022 preview

December 31, 2021 Comments off

This is Ephemeris for New Year’s Eve, Friday, December 31st. The Sun will rise at 8:20. It’ll be up for 8 hours and 52 minutes, setting at 5:12. The Moon, 1 day before new, will rise at 7:20 tomorrow morning.

Tomorrow starts the new year of 2022. The daylight hours are slowly getting longer and will accelerate during the month. Daylight hours will increase from 8 hours and 52 minutes tomorrow to 9 hours and 47 minutes on the 31st. The sunrise time will decrease from 8:20 tomorrow to 8:02 at month’s end. The sunset times will increase from 5:13 tomorrow to 5:50 on the 31st. Along with that, the altitude of the sun at noon will increase from 22 degrees tomorrow to nearly 28 degrees at month’s end. It will be a degree lower for folks in the Straits area because they are a degree of latitude farther north. Local noon, by the way, for Interlochen and Traverse City is about 12:51 p.m. in January. Here’s wishing you a Happy New Year.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). They may be different for your location.

Addendum

Updated to replace twilight table at 5:07 pm.

January Evening Star Chart

January Evening Star Chart

Star Chart for January 2022 evenings, based on 9 p.m. EST, January 15, 2022. Click on image to enlarge. Created using my LookingUp program.

January Morning Star Chart

January Morning Star Chart

Star Chart for January 2022 mornings, based on 6 a.m. EST, January 15, 2022. Click on image to enlarge. Created using my LookingUp program.

Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). For a list of constellation names to go with the abbreviations, click here.

The planets are also plotted for the 15th. For a check on the current whereabouts of the five naked eye planets, see the Wednesday post most weeks.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • The leaky bowl of the Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, then
  • Follow the spike to Spica.
  • QuadR on the star charts is the radiant of the Quadrantid meteor shower, which peaks on the 3rd, but is best seen in the early morning hours of the 3rd or 4th.

Twilight Limits, Nautical and Astronomical

      EST        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2022-01-01 6h35m 7h11m 18h22m 18h57m 18h57m 6h35m 0
2022-01-02 6h35m 7h11m 18h23m 18h58m 18h58m 6h35m 0
2022-01-03 6h35m 7h11m 18h24m 18h59m 18h59m 6h35m 0.03
2022-01-04 6h35m 7h11m 18h25m 19h00m 19h35m 6h35m 0.08
2022-01-05 6h35m 7h11m 18h26m 19h01m 20h53m 6h35m 0.16
2022-01-06 6h35m 7h11m 18h26m 19h02m 22h08m 6h35m 0.25
2022-01-07 6h35m 7h11m 18h27m 19h03m 23h19m 6h35m 0.35
2022-01-08 6h35m 7h10m 18h28m 19h04m 6h35m 0.45
2022-01-09 6h35m 7h10m 18h29m 19h05m 0h27m 6h35m 0.55
2022-01-10 6h35m 7h10m 18h30m 19h06m 1h32m 6h35m 0.64
2022-01-11 6h35m 7h10m 18h31m 19h07m 2h37m 6h35m 0.73
2022-01-12 6h35m 7h10m 18h33m 19h08m 3h41m 6h35m 0.81
2022-01-13 6h34m 7h09m 18h34m 19h09m 4h45m 6h34m 0.88
2022-01-14 6h34m 7h09m 18h35m 19h10m 5h48m 6h34m 0.93
2022-01-15 6h34m 7h08m 18h36m 19h11m 0.97
2022-01-16 6h33m 7h08m 18h37m 19h12m 0.99
2022-01-17 6h33m 7h08m 18h38m 19h13m 1
2022-01-18 6h32m 7h07m 18h39m 19h14m 0.99
2022-01-19 6h32m 7h07m 18h40m 19h15m 19h15m 19h15m 0.95
2022-01-20 6h31m 7h06m 18h41m 19h16m 19h16m 20h23m 0.9
2022-01-21 6h31m 7h05m 18h43m 19h17m 19h17m 21h32m 0.83
2022-01-22 6h30m 7h05m 18h44m 19h18m 19h18m 22h41m 0.75
2022-01-23 6h29m 7h04m 18h45m 19h20m 19h20m 23h51m 0.65
2022-01-24 6h29m 7h03m 18h46m 19h21m 19h21m 0.54
2022-01-25 6h28m 7h03m 18h47m 19h22m 19h22m 1h04m 0.43
2022-01-26 6h27m 7h02m 18h49m 19h23m 19h23m 2h19m 0.32
2022-01-27 6h27m 7h01m 18h50m 19h24m 19h24m 3h37m 0.21
2022-01-28 6h26m 7h00m 18h51m 19h25m 19h25m 4h56m 0.13
2022-01-29 6h25m 6h59m 18h52m 19h27m 19h27m 6h11m 0.06
2022-01-30 6h24m 6h58m 18h54m 19h28m 19h28m 6h24m 0.01
2022-01-31 6h23m 6h57m 18h55m 19h29m 19h29m 6h23m 0

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

    Date     Time     Event
Jan  1  Sa            Venus: 12.4° E
     1  Sa   6:00 pm  Moon Perigee: 358000 km
     2  Su   8:35 am  Moon South Dec.: 26.3° S
     2  Su   1:33 pm  New Moon
     3  Mo   3:56 pm  Quadrantid Shower: ZHR = 120
     3  Mo   7:59 pm  Perihelion: 0.9833 AU
     4  Tu  11:50 am  Moon-Saturn: 4.2° N
     5  We   7:09 pm  Moon-Jupiter: 4.5° N
     7  Fr   5:59 am  Mercury Elongation: 19.2° E
     8  Sa   7:50 pm  Venus Inferior Conj.
     9  Su   1:11 pm  First Quarter
    12  We  11:17 pm  Mercury-Saturn: 3.4° N
    12  We  11:19 pm  Moon Ascending Node
    14  Fr   4:27 am  Moon Apogee: 405800 km
    16  Su   5:16 am  Moon North Dec.: 26.3° N
    17  Mo  10:37 am  Moon-Pollux: 2.9° N
    17  Mo   6:48 pm  Full Moon
    18  Tu  11:33 am  Moon-Beehive: 3.5° S
    23  Su   5:25 am  Mercury Inferior Conj.
    25  Tu   8:41 am  Last Quarter
    27  Th   1:14 am  Moon Descending Node
    29  Sa  10:05 am  Moon-Mars: 2.4° N
    29  Sa   6:26 pm  Moon South Dec.: 26.4° S
    30  Su   2:09 am  Moon Perigee: 362300 km
Feb  1  Tu            Venus: 32° W

All event times are given for UTC-5 Eastern Standard Time.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU                  Ephemeris of Sky Events for Interlochen/TC
January, 2022    Local time zone: EST
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sat  1| 08:20a  05:13p  08:52 | 06:23p  07:09a |      Rise 08:33a    1%|
+------+-----------------------+----------------+-----------------------+
|Sun  2| 08:20a  05:13p  08:53 | 06:24p  07:09a |New   Set  04:59p    0%|
|Mon  3| 08:20a  05:14p  08:54 | 06:25p  07:09a |      Set  06:14p    2%|
|Tue  4| 08:20a  05:15p  08:55 | 06:25p  07:10a |      Set  07:34p    7%|
|Wed  5| 08:19a  05:16p  08:57 | 06:26p  07:10a |      Set  08:53p   14%|
|Thu  6| 08:19a  05:18p  08:58 | 06:27p  07:09a |      Set  10:07p   23%|
|Fri  7| 08:19a  05:19p  08:59 | 06:28p  07:09a |      Set  11:18p   32%|
|Sat  8| 08:19a  05:20p  09:00 | 06:29p  07:09a |      Set  12:26a   42%|
+------+-----------------------+----------------+-----------------------+
|Sun  9| 08:19a  05:21p  09:02 | 06:30p  07:09a |F Qtr Set  01:32a   52%|
|Mon 10| 08:18a  05:22p  09:03 | 06:31p  07:09a |      Set  02:36a   62%|
|Tue 11| 08:18a  05:23p  09:05 | 06:32p  07:09a |      Set  03:41a   71%|
|Wed 12| 08:17a  05:24p  09:06 | 06:33p  07:08a |      Set  04:45a   79%|
|Thu 13| 08:17a  05:26p  09:08 | 06:34p  07:08a |      Set  05:47a   86%|
|Fri 14| 08:17a  05:27p  09:10 | 06:36p  07:08a |      Set  06:47a   92%|
|Sat 15| 08:16a  05:28p  09:11 | 06:37p  07:07a |      Set  07:41a   96%|
+------+-----------------------+----------------+-----------------------+
|Sun 16| 08:15a  05:29p  09:13 | 06:38p  07:07a |      Set  08:27a   99%|
|Mon 17| 08:15a  05:31p  09:15 | 06:39p  07:06a |Full  Rise 05:04p  100%|
|Tue 18| 08:14a  05:32p  09:17 | 06:40p  07:06a |      Rise 06:07p   99%|
|Wed 19| 08:13a  05:33p  09:19 | 06:41p  07:05a |      Rise 07:15p   96%|
|Thu 20| 08:13a  05:34p  09:21 | 06:42p  07:05a |      Rise 08:23p   91%|
|Fri 21| 08:12a  05:36p  09:23 | 06:44p  07:04a |      Rise 09:31p   85%|
|Sat 22| 08:11a  05:37p  09:25 | 06:45p  07:04a |      Rise 10:41p   76%|
+------+-----------------------+----------------+-----------------------+
|Sun 23| 08:10a  05:39p  09:28 | 06:46p  07:03a |      Rise 11:51p   67%|
|Mon 24| 08:09a  05:40p  09:30 | 06:47p  07:02a |      Rise 01:03a   56%|
|Tue 25| 08:09a  05:41p  09:32 | 06:48p  07:01a |L Qtr Rise 02:19a   45%|
|Wed 26| 08:08a  05:43p  09:35 | 06:50p  07:01a |      Rise 03:37a   34%|
|Thu 27| 08:07a  05:44p  09:37 | 06:51p  07:00a |      Rise 04:56a   24%|
|Fri 28| 08:06a  05:45p  09:39 | 06:52p  06:59a |      Rise 06:10a   14%|
|Sat 29| 08:05a  05:47p  09:42 | 06:53p  06:58a |      Rise 07:15a    7%|
+------+-----------------------+----------------+-----------------------+
|Sun 30| 08:04a  05:48p  09:44 | 06:55p  06:57a |      Rise 08:07a    2%|
|Mon 31| 08:02a  05:50p  09:47 | 06:56p  06:56a |      Rise 08:48a    0%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.

11/30/2021 – Ephemeris – Previewing December skies

November 30, 2021 Comments off

This is Ephemeris for Tuesday, November 30th. Today the Sun will be up for 9 hours and 4 minutes, setting at 5:03, and it will rise tomorrow at 8:00. The Moon, 3 days past last quarter, will rise at 4:24 tomorrow morning.

Let’s look ahead at the skies of December. We are now in the holiday season and about to celebrate the southernmost travel of the Sun in the sky and its return northward. The Sun will stop its travel south, the winter solstice on the 21st at 10:59 a.m. That will make that day the shortest day in terms of daylight hours. However, the earliest sunset and latest sunrise don’t coincide with that date. The reason is the Earth is closer to the Sun than average and is moving faster in its orbit than it normally does. It skews the sunrise and sunset times, making them later than they would be on average. We have a comet, C/2021 A1 (Leonard), that will be bright enough to be visible in binoculars coming into view in the morning later this week and into the next.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). They may be different for your location.

Addendum

December Evening Star Chart

December Evening Star Chart

Star Chart for December 2021 (9 p.m. EST December 15, 2021). Click on image to enlarge. Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 9 pm EST in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT).

December Morning Star Chart

Star Chart for December mornings, 2021 (6 a.m. EST December 15, 2021). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • The leaky bowl of the Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, then
  • Follow the spike to Spica.
  • The Summer Triangle is in red.
  • GemR on the star charts is the radiant of the Geminid meteor shower, which peaks on the morning of the 14th.

Twilight Limits, Nautical and Astronomical

      EST        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-12-01 6h20m 6h56m 18h15m 18h51m 18h51m 4h24m 0.07
2021-12-02 6h21m 6h57m 18h15m 18h50m 18h50m 5h45m 0.02
2021-12-03 6h22m 6h57m 18h15m 18h50m 18h50m 6h22m 0
2021-12-04 6h23m 6h58m 18h15m 18h50m 18h50m 6h23m 0.01
2021-12-05 6h24m 6h59m 18h15m 18h50m 18h50m 6h24m 0.05
2021-12-06 6h25m 7h00m 18h15m 18h50m 19h27m 6h25m 0.12
2021-12-07 6h26m 7h01m 18h15m 18h50m 20h43m 6h26m 0.21
2021-12-08 6h27m 7h02m 18h15m 18h50m 22h00m 6h27m 0.31
2021-12-09 6h28m 7h03m 18h15m 18h50m 23h14m 6h28m 0.41
2021-12-10 6h28m 7h04m 18h15m 18h50m 6h28m 0.52
2021-12-11 6h29m 7h05m 18h15m 18h50m 0h25m 6h29m 0.62
2021-12-12 6h30m 7h05m 18h15m 18h51m 1h32m 6h30m 0.71
2021-12-13 6h31m 7h06m 18h15m 18h51m 2h38m 6h31m 0.79
2021-12-14 6h31m 7h07m 18h16m 18h51m 3h42m 6h31m 0.87
2021-12-15 6h32m 7h07m 18h16m 18h51m 4h46m 6h32m 0.92
2021-12-16 6h33m 7h08m 18h16m 18h52m 5h50m 6h33m 0.97
2021-12-17 6h29m 7h05m 18h13m 18h48m 0.99
2021-12-18 6h30m 7h05m 18h13m 18h48m 1
2021-12-19 6h30m 7h06m 18h13m 18h49m 0.99
2021-12-20 6h31m 7h07m 18h14m 18h49m 0.96
2021-12-21 6h31m 7h07m 18h14m 18h50m 18h50m 19h11m 0.92
2021-12-22 6h32m 7h07m 18h15m 18h50m 18h50m 20h16m 0.86
2021-12-23 6h32m 7h08m 18h15m 18h51m 18h51m 21h23m 0.78
2021-12-24 6h33m 7h08m 18h16m 18h51m 18h51m 22h31m 0.7
2021-12-25 6h33m 7h09m 18h17m 18h52m 18h52m 23h40m 0.6
2021-12-26 6h34m 7h09m 18h17m 18h53m 18h53m 0.49
2021-12-27 6h34m 7h09m 18h18m 18h53m 18h53m 0h50m 0.38
2021-12-28 6h34m 7h10m 18h19m 18h54m 18h54m 2h02m 0.27
2021-12-29 6h34m 7h10m 18h19m 18h55m 18h55m 3h18m 0.18
2021-12-30 6h35m 7h10m 18h20m 18h55m 18h55m 4h38m 0.1
2021-12-31 6h35m 7h10m 18h21m 18h56m 18h56m 6h00m 0.04

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

     Date     Time    Event
Dec  1  We            Venus: 41.4° E
     3  Fr   9:58 am  Moon Descending Node
     4  Sa   2:34 am  Total Solar Eclipse (Antarctica, Southern Ocean)
     4  Sa   2:43 am  New Moon
     4  Sa   5:01 am  Moon Perigee: 356800 km
     5  Su   9:25 pm  Moon South Dec.: 26.3° S
     6  Mo   7:48 pm  Moon-Venus: 1.9° N
     7  Tu   8:52 pm  Moon-Saturn: 4.2° N
     9  Th   1:07 am  Moon-Jupiter: 4.6° N
    10  Fr   8:36 pm  First Quarter
    14  Tu   1:44 am  Geminid Shower: ZHR = 120
    16  Th   7:12 pm  Moon Ascending Node
    17  Fr   9:16 pm  Moon Apogee: 406300 km
    18  Sa  11:36 pm  Full Moon
    19  Su  11:32 pm  Moon North Dec.: 26.3° N
    21  Tu   4:20 am  Moon-Pollux: 2.9° N
    21  Tu  10:59 am  Winter Solstice
    22  We   5:28 am  Moon-Beehive: 3.6° S
    22  We  10:00 am  Ursid Shower: ZHR = 10
    26  Su   9:24 pm  Last Quarter
    27  Mo   4:17 am  Mars-Antares: 4.5° N
    28  Tu  11:49 pm  Mercury-Venus: 4.2° N
    30  Th   8:07 pm  Moon Descending Node
    31  Fr   3:13 pm  Moon-Mars: 0.9° N

All event times are given for UTC-5 Eastern Standard Time.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU                  Ephemeris of Sky Events for Interlochen/TC
December, 2021    Local time zone: EST
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Wed  1| 08:00a  05:03p  09:03 | 06:12p  06:50a |      Rise 05:45a    8%|
|Thu  2| 08:01a  05:03p  09:01 | 06:12p  06:51a |      Rise 07:09a    3%|
|Fri  3| 08:02a  05:02p  09:00 | 06:12p  06:52a |      Rise 08:33a    0%|
|Sat  4| 08:03a  05:02p  08:59 | 06:12p  06:53a |New   Set  05:18p    1%|
+------+-----------------------+----------------+-----------------------+
|Sun  5| 08:04a  05:02p  08:57 | 06:12p  06:54a |      Set  06:17p    4%|
|Mon  6| 08:05a  05:02p  08:56 | 06:12p  06:55a |      Set  07:27p   11%|
|Tue  7| 08:06a  05:02p  08:55 | 06:12p  06:56a |      Set  08:43p   19%|
|Wed  8| 08:07a  05:02p  08:54 | 06:12p  06:57a |      Set  10:00p   28%|
|Thu  9| 08:08a  05:02p  08:53 | 06:12p  06:58a |      Set  11:14p   39%|
|Fri 10| 08:09a  05:02p  08:52 | 06:12p  06:59a |F Qtr Set  12:25a   49%|
|Sat 11| 08:10a  05:02p  08:51 | 06:12p  06:59a |      Set  01:32a   60%|
+------+-----------------------+----------------+-----------------------+
|Sun 12| 08:11a  05:02p  08:51 | 06:12p  07:00a |      Set  02:37a   69%|
|Mon 13| 08:11a  05:02p  08:50 | 06:12p  07:01a |      Set  03:41a   78%|
|Tue 14| 08:12a  05:02p  08:49 | 06:13p  07:02a |      Set  04:45a   85%|
|Wed 15| 08:13a  05:02p  08:49 | 06:13p  07:02a |      Set  05:50a   91%|
|Thu 16| 08:14a  05:03p  08:49 | 06:13p  07:03a |      Set  06:53a   96%|
|Fri 17| 08:14a  05:03p  08:48 | 06:14p  07:04a |      Set  07:56a   99%|
|Sat 18| 08:15a  05:03p  08:48 | 06:14p  07:04a |Full  Rise 04:34p  100%|
+------+-----------------------+----------------+-----------------------+
|Sun 19| 08:16a  05:04p  08:48 | 06:14p  07:05a |      Rise 05:19p   99%|
|Mon 20| 08:16a  05:04p  08:48 | 06:15p  07:05a |      Rise 06:12p   97%|
|Tue 21| 08:17a  05:05p  08:48 | 06:15p  07:06a |      Rise 07:11p   93%|
|Wed 22| 08:17a  05:05p  08:48 | 06:16p  07:06a |      Rise 08:16p   87%|
|Thu 23| 08:18a  05:06p  08:48 | 06:16p  07:07a |      Rise 09:23p   80%|
|Fri 24| 08:18a  05:06p  08:48 | 06:17p  07:07a |      Rise 10:31p   71%|
|Sat 25| 08:18a  05:07p  08:48 | 06:18p  07:08a |      Rise 11:40p   62%|
+------+-----------------------+----------------+-----------------------+
|Sun 26| 08:19a  05:08p  08:49 | 06:18p  07:08a |L Qtr Rise 12:50a   51%|
|Mon 27| 08:19a  05:08p  08:49 | 06:19p  07:08a |      Rise 02:02a   40%|
|Tue 28| 08:19a  05:09p  08:50 | 06:20p  07:09a |      Rise 03:18a   30%|
|Wed 29| 08:19a  05:10p  08:50 | 06:20p  07:09a |      Rise 04:37a   20%|
|Thu 30| 08:19a  05:11p  08:51 | 06:21p  07:09a |      Rise 06:00a   11%|
|Fri 31| 08:20a  05:12p  08:52 | 06:22p  07:09a |      Rise 07:20a    5%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.

Comet Leonard

Comet 2021 A1 Leonard in the morning Dec 2021

Comet Leonard’s positions at 6:30 am on the dates indicated. The labels are Month-Day Total Magnitude. The star’s position relative to the horizon and the position of Mars are for November 27th. The star field will be shifting to the upper right each morning at 6:30 from the November 27th date. Comets always appear dimmer than their magnitude suggests because they are extended objects, not points like stars. Also, comet magnitudes can be unpredictable. Plus, the comet tails will not appear as long. The tail may not actually be visible visually. Created using Cartes du Ciel (Sky Charts). Reprinted from my article in the December 2021 issue of the Stellar Sentinel, the newsletter for the Grand Traverse Astronomical Society.

This is our best shot at spotting the comet. After it passes the Sun and enters the evening sky, the comet will hug the southwest to southern horizon in twilight. I’ll have more on Comet Leonard in the rest of the programs this week.

11/01/2021 – Ephemeris – Previewing November skies

November 1, 2021 Comments off

This is Ephemeris for Monday, November 1st. The Sun will rise at 8:21. It’ll be up for 10 hours and 9 minutes, setting at 6:31. The Moon, 3 days before new, will rise at 5:18 tomorrow morning.

Let’s look ahead at the skies for the month of November. The Sun is still moving south rapidly at the beginning of the month, but will slow down toward the end. Daylight hours in the Interlochen/Traverse City area and will drop from 10 hours and 9 minutes today to 9 hours 4 minutes on the 30th. The altitude, or angle, of the Sun above the southern horizon at local noon will be at 30 degrees tomorrow and will descend to 23 and a half degrees on the 30th. The altitude of the Sun in the Straits area will be a degree lower. Local noon, this month, is about 12:30 p.m. There will be an almost total eclipse of the Moon on the morning of Friday the 19th. The eclipse will start at 2:18 am. Mid-eclipse with a tiny sliver of the Moon in sunlight will be at 4:05 am. It all ends at 5:47 am.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). They may be different for your location.

Addendum

November Evening Star Chart

November Evening Star Chart

Star Chart for November evenings, 2021 (9 p.m. EST November 15, 2019). Click on image to enlarge. Click on image to enlarge. Created using my LookingUp program.

November Morning Star Chart

November Morning Star Chart

Star Chart for November mornings, 2021 (6 a.m. EST November 15, 2020). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations, click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus
  • The Summer Triangle is in red.
  • TauR on the evening star chart can be used as the radiant for the North and South Taurid meteor showers.
  • LeoR on the morning star chart is the radiant of the Leonid meteor shower, which peaks between the 17th.

Twilight Limits, Nautical and Astronomical

      EDT        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-11-01 6h47m 7h21m 19h39m 20h13m 20h13m 4h03m 0.1
2021-11-02 6h48m 7h22m 19h38m 20h12m 20h12m 5h18m 0.04
2021-11-03 6h49m 7h23m 19h36m 20h10m 20h10m 6h36m 0.01
2021-11-04 6h51m 7h25m 19h35m 20h09m 20h09m 6h51m 0
2021-11-05 6h52m 7h26m 19h34m 20h08m 20h08m 6h52m 0.03
2021-11-06 6h53m 7h27m 19h33m 20h07m 20h07m 6h53m 0.08
2021-11-07 5h54m 6h28m 18h32m 19h06m 19h35m 5h54m 0.15
2021-11-08 5h55m 6h30m 18h31m 19h05m 20h37m 5h55m 0.25
2021-11-09 5h57m 6h31m 18h30m 19h04m 21h48m 5h57m 0.36
2021-11-10 5h58m 6h32m 18h29m 19h03m 23h02m 5h58m 0.47
2021-11-11 5h59m 6h33m 18h28m 19h02m 5h59m 0.57
2021-11-12 6h00m 6h34m 18h27m 19h01m 0h16m 6h00m 0.68
2021-11-13 6h01m 6h36m 18h26m 19h00m 1h27m 6h01m 0.77
2021-11-14 6h02m 6h37m 18h25m 18h59m 2h35m 6h02m 0.85
2021-11-15 6h03m 6h38m 18h24m 18h59m 3h41m 6h03m 0.91
2021-11-16 6h05m 6h39m 18h23m 18h58m 4h45m 6h05m 0.96
2021-11-17 6h06m 6h40m 18h23m 18h57m 5h50m 6h06m 0.99
2021-11-18 6h07m 6h41m 18h22m 18h56m 1
2021-11-19 6h08m 6h43m 18h21m 18h56m 0.99
2021-11-20 6h09m 6h44m 18h20m 18h55m 0.97
2021-11-21 6h10m 6h45m 18h20m 18h54m 0.93
2021-11-22 6h11m 6h46m 18h19m 18h54m 18h54m 19h22m 0.87
2021-11-23 6h12m 6h47m 18h19m 18h53m 18h53m 20h17m 0.81
2021-11-24 6h13m 6h48m 18h18m 18h53m 18h53m 21h19m 0.72
2021-11-25 6h14m 6h49m 18h18m 18h52m 18h52m 22h24m 0.63
2021-11-26 6h15m 6h50m 18h17m 18h52m 18h52m 23h33m 0.53
2021-11-27 6h16m 6h51m 18h17m 18h52m 18h52m 0.43
2021-11-28 6h17m 6h52m 18h16m 18h51m 18h51m 0h43m 0.33
2021-11-29 6h18m 6h54m 18h16m 18h51m 18h51m 1h54m 0.23
2021-11-30 6h19m 6h55m 18h16m 18h51m 18h51m 3h07m 0.14

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

   Date      Time    Event
Nov  1  Mo            Venus: 47° E
     1  Mo   8:17 pm  Mercury-Spica: 4.1° N
     4  Th   4:15 pm  New Moon
     4  Th   7:13 pm  Uranus Opposition
     5  Fr   5:23 pm  Moon Perigee: 358800 km
     5  Fr  10:38 pm  Moon Descending Node
     8  Mo  12:21 am  Moon-Venus: 1.1° S
     8  Mo  11:27 am  Moon South Dec.: 26.3° S
    10  We   9:27 am  Moon-Saturn: 4.2° N
    11  Th   7:46 am  First Quarter
    11  Th  12:12 pm  Moon-Jupiter: 4.5° N
    12  Fr   6:16 am  North Taurid Shower: ZHR = 15
    17  We  12:33 pm  Leonid Shower: ZHR = 15
    19  Fr   3:58 am  Full Moon
    19  Fr   4:04 am  Partial Lunar Eclipse
    19  Fr  12:59 pm  Moon Ascending Node
    20  Sa   9:14 pm  Moon Apogee: 406300 km
    22  Mo   5:43 pm  Moon North Dec.: 26.3° N
    23  Tu  10:22 pm  Moon-Pollux: 2.8° N
    24  We  11:32 pm  Moon-Beehive: 3.6° S
    27  Sa   7:28 am  Last Quarter
    28  Su  11:35 pm  Mercury Superior Solar Conj.

All event times for November 1-6 are given for UTC-4 Eastern Daylight Saving Time. Dates after that times are given for UTC-5 Eastern Standard Time.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU             Ephemeris of Sky Events for Interlochen/TC
November, 2021    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Mon  1| 08:21a  06:31p  10:09 | 07:36p  07:16a |      Rise 05:18a   11%|
|Tue  2| 08:22a  06:29p  10:07 | 07:34p  07:17a |      Rise 06:35a    5%|
|Wed  3| 08:23a  06:28p  10:04 | 07:33p  07:18a |      Rise 07:56a    1%|
|Thu  4| 08:25a  06:26p  10:01 | 07:32p  07:19a |New   Set  06:31p    0%|
|Fri  5| 08:26a  06:25p  09:59 | 07:31p  07:21a |      Set  07:04p    2%|
|Sat  6| 08:27a  06:24p  09:56 | 07:30p  07:22a |      Set  07:44p    7%|
+------+-----------------------+----------------+-----------------------+
| EST  |      Time Change      |                |                       |
|Sun  7| 07:29a  05:23p  09:53 | 06:28p  06:23a |      Set  07:35p   14%|
|Mon  8| 07:30a  05:21p  09:51 | 06:27p  06:24a |      Set  08:37p   23%|
|Tue  9| 07:32a  05:20p  09:48 | 06:26p  06:25a |      Set  09:48p   33%|
|Wed 10| 07:33a  05:19p  09:46 | 06:25p  06:27a |      Set  11:02p   44%|
|Thu 11| 07:34a  05:18p  09:43 | 06:24p  06:28a |F Qtr Set  12:16a   55%|
|Fri 12| 07:36a  05:17p  09:41 | 06:24p  06:29a |      Set  01:27a   65%|
|Sat 13| 07:37a  05:16p  09:38 | 06:23p  06:30a |      Set  02:35a   75%|
+------+-----------------------+----------------+-----------------------+
|Sun 14| 07:38a  05:15p  09:36 | 06:22p  06:31a |      Set  03:40a   83%|
|Mon 15| 07:40a  05:14p  09:34 | 06:21p  06:33a |      Set  04:45a   90%|
|Tue 16| 07:41a  05:13p  09:31 | 06:20p  06:34a |      Set  05:49a   95%|
|Wed 17| 07:42a  05:12p  09:29 | 06:19p  06:35a |      Set  06:54a   98%|
|Thu 18| 07:44a  05:11p  09:27 | 06:19p  06:36a |      Set  07:58a  100%|
|Fri 19| 07:45a  05:10p  09:25 | 06:18p  06:37a |Full  Rise 05:23p  100%|
|Sat 20| 07:46a  05:09p  09:23 | 06:17p  06:38a |      Rise 05:56p   98%|
+------+-----------------------+----------------+-----------------------+
|Sun 21| 07:48a  05:09p  09:21 | 06:17p  06:40a |      Rise 06:35p   94%|
|Mon 22| 07:49a  05:08p  09:19 | 06:16p  06:41a |      Rise 07:22p   89%|
|Tue 23| 07:50a  05:07p  09:17 | 06:15p  06:42a |      Rise 08:17p   82%|
|Wed 24| 07:51a  05:07p  09:15 | 06:15p  06:43a |      Rise 09:19p   74%|
|Thu 25| 07:53a  05:06p  09:13 | 06:15p  06:44a |      Rise 10:24p   65%|
|Fri 26| 07:54a  05:05p  09:11 | 06:14p  06:45a |      Rise 11:33p   55%|
|Sat 27| 07:55a  05:05p  09:09 | 06:14p  06:46a |L Qtr Rise 12:42a   45%|
+------+-----------------------+----------------+-----------------------+
|Sun 28| 07:56a  05:04p  09:08 | 06:13p  06:47a |      Rise 01:54a   35%|
|Mon 29| 07:57a  05:04p  09:06 | 06:13p  06:48a |      Rise 03:07a   25%|
|Tue 30| 07:59a  05:03p  09:04 | 06:13p  06:49a |      Rise 04:24a   15%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset
Generated using my LookingUp for DOS program.

Preview of the November 19, 2021 partial lunar eclipse at maximum at 4:05 am

Mid-eclipse Lunar Eclipse 4:05 am EST, 11/19/2021

A Stellarium simulation of what the partial lunar eclipse of the 19th might look like at its peak at 4:05 am EST.

09/30/2021 – Ephemeris – Previewing October skies

September 30, 2021 Comments off

This is Ephemeris for Thursday, September 30th. Today the Sun will be up for 11 hours and 44 minutes, setting at 7:24, and it will rise tomorrow at 7:41. The Moon, 2 days past last quarter, will rise at 1:42 tomorrow morning.

Let’s look at the skies for this month of October. The Sun will still be moving south rapidly. Daylight hours in the Interlochen/Traverse City area will drop from 11 hours and 41 minutes tomorrow to 10 hours 12 minutes on the 31st. The altitude of the sun above the southern horizon at local noon will be 42 degrees tomorrow, and will descend to 31 degrees on Halloween, also in the Interlochen/Traverse City area. The Straits area will have the sun a degree lower. Local noon, when the Sun is due south, will be about 1:30 pm in Interlochen and Traverse City. Bits of Halley’s comet will return later in the month as the Orionid meteor shower. However, it will have to compete with a nearly full moon.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT-4 hours). They may be different for your location.

October Evening Star Chart

Star Chart October

Star Chart for October 2021. (9 p.m. EDT, October 15, 2021) Click on image to enlarge. Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 9 p.m. EDT in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.

October Morning Star Chart

Star Chart October Mornings

Star Chart for October mornings, 2021 (6 a.m. EDT, October 15, 2021). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations, click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • Leaky dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus.
  • The Summer Triangle is in red.
  • OriR – Orionid Radiant – Peak 22nd – Zenithal Hourly Rate = 20

Twilight Limits, Nautical and Astronomical

EDT
Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-10-01 6h09m 6h43m 20h29m 21h03m 21h03m 1h42m 0.21
2021-10-02 6h10m 6h44m 20h27m 21h01m 21h01m 2h49m 0.13
2021-10-03 6h11m 6h45m 20h25m 20h59m 20h59m 4h01m 0.07
2021-10-04 6h13m 6h47m 20h23m 20h57m 20h57m 5h15m 0.02
2021-10-05 6h14m 6h48m 20h21m 20h55m 20h55m 6h14m 0
2021-10-06 6h15m 6h49m 20h19m 20h54m 20h54m 6h15m 0.01
2021-10-07 6h16m 6h50m 20h18m 20h52m 20h52m 6h16m 0.04
2021-10-08 6h18m 6h52m 20h16m 20h50m 20h50m 6h18m 0.1
2021-10-09 6h19m 6h53m 20h14m 20h48m 21h10m 6h19m 0.19
2021-10-10 6h20m 6h54m 20h12m 20h46m 21h53m 6h20m 0.29
2021-10-11 6h21m 6h55m 20h11m 20h44m 22h46m 6h21m 0.4
2021-10-12 6h23m 6h57m 20h09m 20h43m 23h50m 6h23m 0.51
2021-10-13 6h24m 6h58m 20h07m 20h41m 6h24m 0.62
2021-10-14 6h25m 6h59m 20h06m 20h39m 1h00m 6h25m 0.72
2021-10-15 6h26m 7h00m 20h04m 20h38m 2h13m 6h26m 0.81
2021-10-16 6h28m 7h01m 20h02m 20h36m 3h25m 6h28m 0.89
2021-10-17 6h29m 7h03m 20h01m 20h34m 4h35m 6h29m 0.94
2021-10-18 6h30m 7h04m 19h59m 20h33m 5h43m 6h30m 0.98
2021-10-19 6h31m 7h05m 19h57m 20h31m 1
2021-10-20 6h33m 7h06m 19h56m 20h30m 1
2021-10-21 6h34m 7h08m 19h54m 20h28m 0.98
2021-10-22 6h35m 7h09m 19h53m 20h26m 0.94
2021-10-23 6h36m 7h10m 19h51m 20h25m 0.89
2021-10-24 6h37m 7h11m 19h50m 20h24m 20h24m 20h56m 0.82
2021-10-25 6h39m 7h12m 19h48m 20h22m 20h22m 21h38m 0.74
2021-10-26 6h40m 7h14m 19h47m 20h21m 20h21m 22h29m 0.66
2021-10-27 6h41m 7h15m 19h45m 20h19m 20h19m 23h27m 0.56
2021-10-28 6h42m 7h16m 19h44m 20h18m 20h18m 0.46
2021-10-29 6h43m 7h17m 19h43m 20h17m 20h17m 0h31m 0.37
2021-10-30 6h45m 7h19m 19h41m 20h15m 20h15m 1h39m 0.27
2021-10-31 6h46m 7h20m 19h40m 20h14m 20h14m 2h50m 0.18

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

Date         Time ET  Event
Oct  1  Fr            Venus: 44.9° E
     1  Fr   9:08 am  Moon-Beehive: 3.3° S
     6  We   7:05 am  New Moon
     7  Th  11:50 pm  Mars Solar Conjunction
     8  Fr   1:28 pm  Moon Perigee: 363400 km
     9  Sa  12:12 pm  Mercury Inferior Conj.
     9  Sa   2:36 pm  Moon-Venus: 2.9° S
     9  Sa   3:35 pm  Moon Descending Node
    10  Su            S Taurid peak ZHR = 5 See IMO Calendar
    12  Tu   5:09 am  Moon South Dec.: 26.2° S
    12  Tu  11:25 pm  First Quarter
    14  Th   3:12 am  Moon-Saturn: 4.1° N
    15  Fr   5:58 am  Moon-Jupiter: 4.3° N
    16  Sa   9:24 am  Venus-Antares: 1.5° N
    20  We  10:57 am  Full Moon
    21  Th   7:30 am  Orionid Shower: ZHR = 20
    23  Sa   7:47 am  Moon Ascending Node
    24  Su  11:30 am  Moon Apogee: 405600 km
    25  Mo  12:59 am  Mercury Greatest Elongation: 18.4° W
    26  Tu  12:04 pm  Moon North Dec.: 26.3° N
    27  We   4:40 pm  Moon-Pollux: 2.8° N
    28  Th   4:05 pm  Last Quarter
    28  Th   5:32 pm  Moon-Beehive: 3.6° S
    29  Fr   5:59 pm  Venus Greatest Elongation: 47° E
Nov  1  Mo            Venus: 47° E

All event times are given for UTC-4 hr: Eastern Daylight Saving Time.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU                  Ephemeris of Sky Events for Interlochen/TC
October, 2021    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Fri  1| 07:41a  07:22p  11:41 | 08:25p  06:38a |      Rise 02:49a   23%|
|Sat  2| 07:42a  07:20p  11:38 | 08:23p  06:39a |      Rise 04:01a   15%|
+------+-----------------------+----------------+-----------------------+
|Sun  3| 07:43a  07:19p  11:35 | 08:21p  06:40a |      Rise 05:15a    8%|
|Mon  4| 07:44a  07:17p  11:32 | 08:20p  06:41a |      Rise 06:30a    3%|
|Tue  5| 07:46a  07:15p  11:29 | 08:18p  06:43a |      Rise 07:46a    0%|
|Wed  6| 07:47a  07:13p  11:26 | 08:16p  06:44a |New   Set  07:41p    0%|
|Thu  7| 07:48a  07:11p  11:23 | 08:14p  06:45a |      Set  08:06p    3%|
|Fri  8| 07:49a  07:09p  11:20 | 08:12p  06:46a |      Set  08:35p    9%|
|Sat  9| 07:51a  07:08p  11:17 | 08:11p  06:47a |      Set  09:09p   17%|
+------+-----------------------+----------------+-----------------------+
|Sun 10| 07:52a  07:06p  11:14 | 08:09p  06:49a |      Set  09:53p   26%|
|Mon 11| 07:53a  07:04p  11:11 | 08:07p  06:50a |      Set  10:46p   37%|
|Tue 12| 07:54a  07:02p  11:08 | 08:05p  06:51a |F Qtr Set  11:50p   48%|
|Wed 13| 07:56a  07:01p  11:05 | 08:04p  06:52a |      Set  01:00a   59%|
|Thu 14| 07:57a  06:59p  11:02 | 08:02p  06:54a |      Set  02:13a   70%|
|Fri 15| 07:58a  06:57p  10:59 | 08:00p  06:55a |      Set  03:25a   79%|
|Sat 16| 07:59a  06:55p  10:56 | 07:59p  06:56a |      Set  04:35a   87%|
+------+-----------------------+----------------+-----------------------+
|Sun 17| 08:01a  06:54p  10:53 | 07:57p  06:57a |      Set  05:43a   93%|
|Mon 18| 08:02a  06:52p  10:50 | 07:56p  06:58a |      Set  06:49a   97%|
|Tue 19| 08:03a  06:50p  10:47 | 07:54p  07:00a |      Set  07:54a  100%|
|Wed 20| 08:05a  06:49p  10:44 | 07:52p  07:01a |Full  Rise 07:07p  100%|
|Thu 21| 08:06a  06:47p  10:41 | 07:51p  07:02a |      Rise 07:29p   98%|
|Fri 22| 08:07a  06:46p  10:38 | 07:49p  07:03a |      Rise 07:53p   95%|
|Sat 23| 08:09a  06:44p  10:35 | 07:48p  07:05a |      Rise 08:22p   90%|
+------+-----------------------+----------------+-----------------------+
|Sun 24| 08:10a  06:42p  10:32 | 07:46p  07:06a |      Rise 08:56p   84%|
|Mon 25| 08:11a  06:41p  10:29 | 07:45p  07:07a |      Rise 09:38p   76%|
|Tue 26| 08:13a  06:39p  10:26 | 07:44p  07:08a |      Rise 10:29p   67%|
|Wed 27| 08:14a  06:38p  10:23 | 07:42p  07:10a |      Rise 11:27p   58%|
|Thu 28| 08:15a  06:36p  10:21 | 07:41p  07:11a |L Qtr Rise 12:31a   48%|
|Fri 29| 08:17a  06:35p  10:18 | 07:39p  07:12a |      Rise 01:39a   38%|
|Sat 30| 08:18a  06:33p  10:15 | 07:38p  07:13a |      Rise 02:50a   29%|
+------+-----------------------+----------------+-----------------------+
|Sun 31| 08:19a  06:32p  10:12 | 07:37p  07:14a |      Rise 04:03a   19%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.

08/31/2021 – Ephemeris – Previewing September skies

August 31, 2021 Comments off

This is Bob Moler with Ephemeris for Tuesday, August 31st. Today the Sun will be up for 13 hours and 16 minutes, setting at 8:20, and it will rise tomorrow at 7:05. The Moon, 1 day past last quarter, will rise at 1:07 tomorrow morning.

Let’s look at the skies for the month of September. The sun will be moving at its greatest speed in its retreat to the south. Daylight hours in the Interlochen/Traverse City area and will drop from 13 hours and 13 minutes tomorrow to 11 hours and 44 minutes on the 30th. The altitude of the Sun above the southern horizon at local noon will be 54 degrees tomorrow, and will descend to 42 degrees on the 30th. Local noon at mid-month will be around 1:37 pm. The season of summer is getting short, so enjoy it while you can. Summer ends and autumn begins at 3:21 p.m. on September 22nd, the autumnal equinox. This year the Harvest Moon, the nearest full moon to the equinox, will fall two days before it on the 20th.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hr). They may be different for your location.

Addendum

September Star Chart

September Evening Star Chart

Star Chart for September 2021. Created using my LookingUp program. Click on the image to enlarge it. Created using my LookingUp program.

The planets and stars are plotted for the 15th at 10 p.m. EDT in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.

September Morning Star Chart

September Morning Star Chart

Star Chart for September 2021 (10 p.m. EDT, September 15, 2021). Click on the image to enlarge it. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations, click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
  • Leaky dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus.
  • The Summer Triangle is in red.

Twilight Limits, Nautical and Astronomical

      EDT        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-09-01 5h26m 6h04m 21h28m 22h06m 22h06m 1h07m 0.24
2021-09-02 5h28m 6h06m 21h26m 22h04m 22h04m 1h57m 0.16
2021-09-03 5h29m 6h07m 21h24m 22h02m 22h02m 2h55m 0.09
2021-09-04 5h31m 6h08m 21h22m 22h00m 22h00m 4h01m 0.04
2021-09-05 5h32m 6h10m 21h20m 21h57m 21h57m 5h11m 0.01
2021-09-06 5h34m 6h11m 21h18m 21h55m 21h55m 5h34m 0
2021-09-07 5h35m 6h12m 21h16m 21h53m 21h53m 5h35m 0.02
2021-09-08 5h37m 6h14m 21h14m 21h51m 21h51m 5h37m 0.06
2021-09-09 5h38m 6h15m 21h12m 21h49m 21h49m 5h38m 0.13
2021-09-10 5h40m 6h16m 21h10m 21h46m 22h06m 5h40m 0.21
2021-09-11 5h41m 6h18m 21h08m 21h44m 22h35m 5h41m 0.32
2021-09-12 5h43m 6h19m 21h06m 21h42m 23h12m 5h43m 0.43
2021-09-13 5h44m 6h20m 21h04m 21h40m 23h57m 5h44m 0.54
2021-09-14 5h46m 6h22m 21h02m 21h38m 5h46m 0.65
2021-09-15 5h47m 6h23m 21h00m 21h36m 0h53m 5h47m 0.76
2021-09-16 5h48m 6h24m 20h58m 21h34m 1h59m 5h48m 0.84
2021-09-17 5h50m 6h25m 20h56m 21h31m 3h10m 5h50m 0.91
2021-09-18 5h51m 6h27m 20h54m 21h29m 4h24m 5h51m 0.96
2021-09-19 5h53m 6h28m 20h52m 21h27m 5h37m 5h53m 0.99
2021-09-20 5h54m 6h29m 20h50m 21h25m 1
2021-09-21 5h55m 6h31m 20h48m 21h23m 0.99
2021-09-22 5h57m 6h32m 20h46m 21h21m 0.95
2021-09-23 5h58m 6h33m 20h44m 21h19m 0.9
2021-09-24 6h00m 6h34m 20h42m 21h17m 21h17m 21h26m 0.84
2021-09-25 6h01m 6h36m 20h40m 21h15m 21h15m 21h52m 0.76
2021-09-26 6h02m 6h37m 20h38m 21h13m 21h13m 22h23m 0.67
2021-09-27 6h04m 6h38m 20h36m 21h11m 21h11m 23h00m 0.58
2021-09-28 6h05m 6h39m 20h34m 21h09m 21h09m 23h46m 0.49
2021-09-29 6h06m 6h41m 20h32m 21h07m 21h07m 0.39
2021-09-30 6h07m 6h42m 20h31m 21h05m 21h05m 0h40m 0.3

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

Sep  1  We            Venus: 39.9° E
     1  We   8:23 pm  Moon North Dec.: 25.9° N
     4  Sa  12:07 am  Moon-Beehive: 3.1° S
     5  Su  10:32 am  Venus-Spica: 1.6° N
     6  Mo   8:52 pm  New Moon
     9  Th  10:09 pm  Moon-Venus: 4.1° S
    11  Sa   6:06 am  Moon Perigee: 368500 km
    12  Su  12:35 pm  Moon Descending Node
    13  Mo   4:39 pm  First Quarter
    13  Mo  11:59 pm  Mercury Elongation: 26.8° E
    14  Tu   4:10 am  Neptune Opposition
    14  Tu  11:48 pm  Moon South Dec.: 26° S
    16  Th  10:37 pm  Moon-Saturn: 3.9° N
    18  Sa   2:50 am  Moon-Jupiter: 4.1° N
    20  Mo   7:55 pm  Full Moon, Harvest Moon 
    20  Mo  10:03 pm  Mercury-Spica: 1.4° S
    22  We   3:21 pm  Autumnal Equinox
    26  Su   3:33 am  Moon Ascending Node
    26  Su   5:44 pm  Moon Apogee: 404600 km
    28  Tu   9:57 pm  Last Quarter
    29  We   4:26 am  Moon North Dec.: 26.1° N
Oct  1  Fr            Venus: 44.9° E

All event times are given for UTC-4 hr: Eastern Daylight Saving Time.

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

LU                  Ephemeris of Sky Events for Interlochen/TC
September, 2021    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Wed  1| 07:05a  08:18p  13:13 | 09:25p  05:59a |      Rise 01:57a   25%|
|Thu  2| 07:06a  08:17p  13:10 | 09:23p  06:00a |      Rise 02:55a   17%|
|Fri  3| 07:07a  08:15p  13:07 | 09:21p  06:01a |      Rise 04:01a   10%|
|Sat  4| 07:09a  08:13p  13:04 | 09:18p  06:03a |      Rise 05:11a    5%|
+------+-----------------------+----------------+-----------------------+
|Sun  5| 07:10a  08:11p  13:01 | 09:16p  06:04a |      Rise 06:24a    1%|
|Mon  6| 07:11a  08:09p  12:58 | 09:14p  06:06a |New   Set  08:30p    0%|
|Tue  7| 07:12a  08:07p  12:55 | 09:12p  06:07a |      Set  08:53p    1%|
|Wed  8| 07:13a  08:06p  12:52 | 09:10p  06:08a |      Set  09:16p    5%|
|Thu  9| 07:14a  08:04p  12:49 | 09:08p  06:10a |      Set  09:40p   11%|
|Fri 10| 07:16a  08:02p  12:46 | 09:06p  06:11a |      Set  10:05p   19%|
|Sat 11| 07:17a  08:00p  12:43 | 09:04p  06:12a |      Set  10:35p   29%|
+------+-----------------------+----------------+-----------------------+
|Sun 12| 07:18a  07:58p  12:40 | 09:02p  06:13a |      Set  11:12p   40%|
|Mon 13| 07:19a  07:56p  12:37 | 09:00p  06:15a |F Qtr Set  11:57p   52%|
|Tue 14| 07:20a  07:54p  12:33 | 08:58p  06:16a |      Set  12:53a   63%|
|Wed 15| 07:21a  07:52p  12:30 | 08:56p  06:17a |      Set  01:59a   73%|
|Thu 16| 07:23a  07:51p  12:27 | 08:54p  06:19a |      Set  03:10a   82%|
|Fri 17| 07:24a  07:49p  12:24 | 08:52p  06:20a |      Set  04:24a   90%|
|Sat 18| 07:25a  07:47p  12:21 | 08:50p  06:21a |      Set  05:37a   95%|
+------+-----------------------+----------------+-----------------------+
|Sun 19| 07:26a  07:45p  12:18 | 08:48p  06:23a |      Set  06:47a   99%|
|Mon 20| 07:27a  07:43p  12:15 | 08:46p  06:24a |Full  Rise 08:03p  100%|
|Tue 21| 07:29a  07:41p  12:12 | 08:44p  06:25a |      Rise 08:23p   99%|
|Wed 22| 07:30a  07:39p  12:09 | 08:42p  06:26a |      Rise 08:43p   96%|
|Thu 23| 07:31a  07:37p  12:06 | 08:40p  06:28a |      Rise 09:03p   91%|
|Fri 24| 07:32a  07:35p  12:03 | 08:39p  06:29a |      Rise 09:26p   85%|
|Sat 25| 07:33a  07:33p  12:00 | 08:37p  06:30a |      Rise 09:52p   78%|
+------+-----------------------+----------------+-----------------------+
|Sun 26| 07:35a  07:32p  11:57 | 08:35p  06:31a |      Rise 10:23p   69%|
|Mon 27| 07:36a  07:30p  11:53 | 08:33p  06:33a |      Rise 11:00p   60%|
|Tue 28| 07:37a  07:28p  11:50 | 08:31p  06:34a |L Qtr Rise 11:46p   51%|
|Wed 29| 07:38a  07:26p  11:47 | 08:29p  06:35a |      Rise 12:40a   41%|
|Thu 30| 07:39a  07:24p  11:44 | 08:27p  06:36a |      Rise 01:42a   32%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset
Generated using my LookingUp for DOS program.

07/30/2021 – Ephemeris – Previewing August skies

July 30, 2021 Comments off

This is Bob Moler with Ephemeris for Friday, July 30th. Today the Sun will be up for 14 hours and 43 minutes, setting at 9:10, and it will rise tomorrow at 6:28. The Moon, 1 day before last quarter, will rise at 12:38 tomorrow morning.

Let’s look ahead at the month of August in the skies. Daylight hours will decrease from 14 hours and 38 minutes on the 1st to 13 hours 16 minutes on the 31st. The altitude of the Sun at local noon, that is, degrees of angle above the horizon, will decrease from 63 degrees Sunday to just over 53 degrees on the 31st. Straits area listeners can subtract one more degree from those angles, but their daylight hours will be a few minutes longer. Local noon, when the Sun is due south, is about 1:43 p.m. The Perseid meteor shower will reach its peak at between 3 and 6 p.m. on the 12th. That means that more than likely the early mornings of the 12th and 13th will be equally good for viewing them. I tend to prefer viewing before the peak, if given a choice.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hr). They may be different for your location.

Addendum

August Evening Star Chart

August evening star chart

Star Chart for August 2020 (10 pm EDT, August 15, 2021). Click on image to enlarge it. Created using my LookingUp program.

The planets and stars are plotted for the 15th at 10 p.m. EDT in the evening and 5 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.

Note the chart times are for the 15th. For each week before the 15th, add ½ hour (28 minutes if you’re picky). For each week after the 15th, subtract ½ hour. The planet positions are updated each Wednesday on this blog. For planet positions on dates other than the 15th.

August Morning Star Chart

StarChart August Morning

Star Chart for August mornings, (5 a.m. EDT, August 15, 2021). Click on image to enlarge. Created using my LookingUp program.

For a list of constellation names to go with the abbreviations click here.

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus, and
  • Extend like a spike to Spica.
  • The Summer Triangle is in red.
  • PerR is the radiant of the Perseid meteor shower (Peaks on the 12th)

Twilight Limits, Nautical and Astronomical

      EDT        
  Morning Twilight Evening Twilight Dark Night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2021-08-01 4h31m 5h19m 22h26m 23h15m 23h15m 1h00m 0.35
2021-08-02 4h32m 5h20m 22h25m 23h13m 23h13m 1h25m 0.26
2021-08-03 4h34m 5h22m 22h23m 23h11m 23h11m 1h55m 0.18
2021-08-04 4h36m 5h23m 22h21m 23h08m 23h08m 2h31m 0.11
2021-08-05 4h38m 5h25m 22h20m 23h06m 23h06m 3h16m 0.06
2021-08-06 4h40m 5h26m 22h18m 23h04m 23h04m 4h09m 0.02
2021-08-07 4h42m 5h28m 22h16m 23h02m 23h02m 4h42m 0
2021-08-08 4h44m 5h29m 22h14m 23h00m 23h00m 4h44m 0
2021-08-09 4h46m 5h31m 22h13m 22h58m 22h58m 4h46m 0.03
2021-08-10 4h48m 5h32m 22h11m 22h55m 22h55m 4h48m 0.08
2021-08-11 4h50m 5h34m 22h09m 22h53m 22h53m 4h50m 0.15
2021-08-12 4h51m 5h35m 22h07m 22h51m 23h13m 4h51m 0.24
2021-08-13 4h53m 5h37m 22h05m 22h49m 23h36m 4h53m 0.34
2021-08-14 4h55m 5h38m 22h03m 22h47m 4h55m 0.45
2021-08-15 4h57m 5h40m 22h02m 22h44m 0h03m 4h57m 0.57
2021-08-16 4h59m 5h41m 22h00m 22h42m 0h34m 4h59m 0.68
2021-08-17 5h01m 5h43m 21h58m 22h40m 1h13m 5h01m 0.78
2021-08-18 5h02m 5h44m 21h56m 22h38m 2h02m 5h02m 0.87
2021-08-19 5h04m 5h46m 21h54m 22h36m 3h02m 5h04m 0.94
2021-08-20 5h06m 5h47m 21h52m 22h33m 4h12m 5h06m 0.98
2021-08-21 5h08m 5h49m 21h50m 22h31m 1
2021-08-22 5h09m 5h50m 21h48m 22h29m 0.99
2021-08-23 5h11m 5h52m 21h46m 22h27m 0.97
2021-08-24 5h13m 5h53m 21h44m 22h24m 0.92
2021-08-25 5h15m 5h54m 21h42m 22h22m 0.86
2021-08-26 5h16m 5h56m 21h40m 22h20m 22h20m 22h40m 0.78
2021-08-27 5h18m 5h57m 21h38m 22h18m 22h18m 23h01m 0.69
2021-08-28 5h20m 5h59m 21h36m 22h15m 22h15m 23h25m 0.6
2021-08-29 5h21m 6h00m 21h34m 22h13m 22h13m 23h53m 0.51
2021-08-30 5h23m 6h01m 21h32m 22h11m 22h11m 0.42
2021-08-31 5h24m 6h03m 21h30m 22h09m 22h09m 0h26m 0.32

Twilight calendar was generated using Cartes du Ciel (Sky Charts).

See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.

NASA Calendar of Planetary Events

    Date     Time    Event
Aug  1  Su            Venus: 33.1° E
     1  Su  10:00 am  Mercury Superior Conj.
     2  Mo   1:24 am  Saturn Opposition
     2  Mo   3:35 am  Moon Apogee: 404400 km
     2  Mo  10:51 pm  Moon Ascending Node
     5  Th  12:46 pm  Moon North Dec.: 25.7° N
     8  Su   9:50 am  New Moon
    11  We   3:00 am  Moon-Venus: 4.4° S
    12  Th   3:11 pm  Perseid Shower: ZHR = 90
    15  Su  11:20 am  First Quarter
    16  Mo  12:04 pm  Moon Descending Node
    17  Tu   5:23 am  Moon Perigee: 369100 km
    18  We   6:24 pm  Moon South Dec.: 25.8° S
    18  We  11:03 pm  Mercury-Mars: 0.1° N
    19  Th   7:05 pm  Jupiter Opposition
    20  Fr   6:19 pm  Moon-Saturn: 3.8° N
    22  Su  12:52 am  Moon-Jupiter: 4.1° N
    22  Su   8:02 am  Full Moon
    29  Su  10:22 pm  Moon Apogee: 404100 km
    30  Mo   1:13 am  Moon Ascending Node
    30  Mo   3:13 am  Last Quarter
Sep  1  We            Venus: 39.9° E

Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.

If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

                  Ephemeris of Sky Events for Interlochen/TC
August, 2021    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun  1| 06:29a  09:08p  14:38 | 10:23p  05:13a |      Rise 01:25a   36%|
|Mon  2| 06:30a  09:06p  14:36 | 10:21p  05:15a |      Rise 01:55a   28%|
|Tue  3| 06:31a  09:05p  14:33 | 10:20p  05:16a |      Rise 02:31a   20%|
|Wed  4| 06:32a  09:04p  14:31 | 10:18p  05:18a |      Rise 03:16a   13%|
|Thu  5| 06:33a  09:02p  14:29 | 10:16p  05:19a |      Rise 04:09a    7%|
|Fri  6| 06:35a  09:01p  14:26 | 10:14p  05:21a |      Rise 05:11a    3%|
|Sat  7| 06:36a  09:00p  14:23 | 10:13p  05:22a |      Rise 06:18a    1%|
+------+-----------------------+----------------+-----------------------+
|Sun  8| 06:37a  08:58p  14:21 | 10:11p  05:24a |New   Set  09:35p    0%|
|Mon  9| 06:38a  08:57p  14:18 | 10:09p  05:25a |      Set  10:03p    2%|
|Tue 10| 06:39a  08:55p  14:16 | 10:07p  05:27a |      Set  10:27p    7%|
|Wed 11| 06:40a  08:54p  14:13 | 10:05p  05:28a |      Set  10:50p   13%|
|Thu 12| 06:42a  08:52p  14:10 | 10:04p  05:30a |      Set  11:13p   22%|
|Fri 13| 06:43a  08:51p  14:08 | 10:02p  05:31a |      Set  11:36p   32%|
|Sat 14| 06:44a  08:49p  14:05 | 10:00p  05:33a |      Set  12:03a   43%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 06:45a  08:48p  14:02 | 09:58p  05:34a |F Qtr Set  12:34a   54%|
|Mon 16| 06:46a  08:46p  13:59 | 09:56p  05:36a |      Set  01:13a   65%|
|Tue 17| 06:47a  08:44p  13:56 | 09:54p  05:37a |      Set  02:02a   76%|
|Wed 18| 06:49a  08:43p  13:54 | 09:52p  05:39a |      Set  03:02a   85%|
|Thu 19| 06:50a  08:41p  13:51 | 09:50p  05:40a |      Set  04:11a   92%|
|Fri 20| 06:51a  08:39p  13:48 | 09:48p  05:42a |      Set  05:26a   97%|
|Sat 21| 06:52a  08:38p  13:45 | 09:46p  05:43a |      Set  06:40a  100%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 06:53a  08:36p  13:42 | 09:45p  05:44a |Full  Rise 09:15p  100%|
|Mon 23| 06:54a  08:34p  13:39 | 09:43p  05:46a |      Rise 09:39p   97%|
|Tue 24| 06:56a  08:33p  13:36 | 09:41p  05:47a |      Rise 10:00p   93%|
|Wed 25| 06:57a  08:31p  13:34 | 09:39p  05:49a |      Rise 10:20p   87%|
|Thu 26| 06:58a  08:29p  13:31 | 09:37p  05:50a |      Rise 10:40p   79%|
|Fri 27| 06:59a  08:27p  13:28 | 09:35p  05:52a |      Rise 11:01p   71%|
|Sat 28| 07:00a  08:26p  13:25 | 09:33p  05:53a |      Rise 11:25p   62%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 07:02a  08:24p  13:22 | 09:31p  05:54a |      Rise 11:53p   53%|
|Mon 30| 07:03a  08:22p  13:19 | 09:29p  05:56a |L Qtr Rise 12:26a   43%|
|Tue 31| 07:04a  08:20p  13:16 | 09:27p  05:57a |      Rise 01:07a   34%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset

Generated using my LookingUp for DOS program.