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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.