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06/29/2018 – Ephemeris – Previewing July skies

June 29, 2018 Comments off

Ephemeris for Friday, June 29th. Today the Sun will be up for 15 hours and 32 minutes, setting at 9:32, and it will rise tomorrow at 6:00. The Moon, 1 day past full, will rise at 10:38 this evening.

Lets preview July’s skies. The Sun, having reached its northern solstice, is beginning to slide southward again, at first imperceptibly, then with greater speed. The daylight hours will decrease from 15 hours and 30 minutes Sunday to 14 hours 41 minutes at month’s end. The daylight hours will be slightly shorter south of Interlochen, and slightly longer to the north. The altitude of the Sun at local noon, when the Sun is due south will decrease from 68 degrees today to 63 degrees at month’s end. The Sun will be a degree lower in the Straits area. Despite the warmth, the Earth will reach its greatest distance from the Sun on Friday the 6th. The planets visible this month in the evening are Venus, Jupiter, Saturn and later, Mars.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

July Evening Star Chart

June evening star chart

Star Chart for July 2018 (11 p.m. EDT July 15, 2018). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 4:30 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 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 4:30 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.

July Morning Star Chart

July Morning Star Chart

Star Chart for July 2018 mornings based on 4:30 a.m. July 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.
  • DAqR – Delta Aquariid meteor shower radiant

Twilight

Evening nautical twilight ends at 11:00 p.m. EDT on the 1st, decreasing to 10:28 p.m. EDT on the 31st.
Evening astronomical twilight ends at 12:03 a.m. EDT on the 1st, decreasing to 11:28 a.m. EDT on the 31st.
Morning astronomical twilight starts at 3:38 a.m. EDT on the 1st, and increasing to 4:28 a.m. EDT on the 31st.
Morning nautical twilight starts at 4:41 a.m. EDT on the 1st, and increasing to 5:17 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

Date        Time    Event
Jul 01  Su          Venus: 40.7° E
    04  We  1:39 am Mercury-Beehive: 0.6° S
    06  Fr  3:51 am Last Quarter
    06  Fr 11:59 am Aphelion: 1.0167 AU
    09  Mo  7:36 pm Venus-Regulus: 1° N
    10  Tu  5:30 am Moon-Aldebaran: 1.1° S
    12  Th 12:59 am Mercury Elongation: 26.4° E
    12  Th  8:01 am Moon North Dec.: 20.8° N
    12  Th 10:48 pm New Moon
    12  Th 11:01 pm Partial Solar Eclipse (S Australia)
    13  Fr  4:28 am Moon Perigee: 357400 km
    13  Fr 10:50 pm Moon Ascending Node
    14  Sa  6:04 pm Moon-Mercury: 2.2° S
    15  Su 12:14 pm Moon-Regulus: 1.7° S
    15  Su 11:31 pm Moon-Venus: 1.6° S
    19  Th  3:52 pm First Quarter
    20  Fr  7:57 pm Moon-Jupiter: 4.8° S
    25  We  2:10 am Moon-Saturn: 2.2° S
    25  We  4:55 pm Moon South Dec.: 20.8° S
    27  Fr  1:31 am Mars Opposition
    27  Fr  1:44 am Moon Apogee: 406200 km
    27  Fr  4:21 pm Full Moon
    27  Fr  4:22 pm Total Lunar Eclipse (S.America, Europe, Africa, Asia)
    27  Fr  6:40 pm Moon Descending Node
    28  Sa  4:50 pm Delta Aquarid Shower: ZHR = 20
    31  Tu  3:51 am Mars closest to the Earth 57.59 mkm
Aug 01  We          Venus: 45.1° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     July, 2018    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Sun  1| 06:01a  09:32p  15:30 | 10:57p  04:35a |      Rise 11:49p   88%|
     |Mon  2| 06:01a  09:31p  15:30 | 10:56p  04:36a |      Rise 12:19a   81%|
     |Tue  3| 06:02a  09:31p  15:29 | 10:56p  04:37a |      Rise 12:47a   72%|
     |Wed  4| 06:02a  09:31p  15:28 | 10:56p  04:37a |      Rise 01:13a   63%|
     |Thu  5| 06:03a  09:30p  15:27 | 10:55p  04:38a |      Rise 01:39a   53%|
     |Fri  6| 06:04a  09:30p  15:26 | 10:54p  04:39a |L Qtr Rise 02:06a   43%|
     |Sat  7| 06:04a  09:30p  15:25 | 10:54p  04:40a |      Rise 02:36a   33%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  8| 06:05a  09:29p  15:24 | 10:53p  04:41a |      Rise 03:10a   23%|
     |Mon  9| 06:06a  09:29p  15:22 | 10:52p  04:42a |      Rise 03:50a   14%|
     |Tue 10| 06:07a  09:28p  15:21 | 10:51p  04:43a |      Rise 04:38a    7%|
     |Wed 11| 06:08a  09:28p  15:20 | 10:51p  04:44a |      Rise 05:36a    2%|
     |Thu 12| 06:08a  09:27p  15:18 | 10:50p  04:46a |New   Set  09:09p    0%|
     |Fri 13| 06:09a  09:26p  15:17 | 10:49p  04:47a |      Set  10:04p    1%|
     |Sat 14| 06:10a  09:26p  15:15 | 10:48p  04:48a |      Set  10:50p    5%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 15| 06:11a  09:25p  15:14 | 10:47p  04:49a |      Set  11:29p   12%|
     |Mon 16| 06:12a  09:24p  15:12 | 10:46p  04:50a |      Set  12:02a   21%|
     |Tue 17| 06:13a  09:24p  15:10 | 10:44p  04:52a |      Set  12:32a   31%|
     |Wed 18| 06:14a  09:23p  15:08 | 10:43p  04:53a |      Set  01:01a   41%|
     |Thu 19| 06:15a  09:22p  15:07 | 10:42p  04:54a |F Qtr Set  01:29a   52%|
     |Fri 20| 06:16a  09:21p  15:05 | 10:41p  04:56a |      Set  01:57a   62%|
     |Sat 21| 06:17a  09:20p  15:03 | 10:40p  04:57a |      Set  02:28a   72%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 22| 06:18a  09:19p  15:01 | 10:38p  04:58a |      Set  03:03a   80%|
     |Mon 23| 06:19a  09:18p  14:59 | 10:37p  05:00a |      Set  03:41a   87%|
     |Tue 24| 06:20a  09:17p  14:57 | 10:36p  05:01a |      Set  04:25a   93%|
     |Wed 25| 06:21a  09:16p  14:55 | 10:34p  05:03a |      Set  05:13a   97%|
     |Thu 26| 06:22a  09:15p  14:53 | 10:33p  05:04a |      Set  06:06a   99%|
     |Fri 27| 06:23a  09:14p  14:50 | 10:31p  05:05a |Full  Rise 09:16p  100%|
     |Sat 28| 06:24a  09:13p  14:48 | 10:30p  05:07a |      Rise 09:51p   99%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 29| 06:25a  09:12p  14:46 | 10:28p  05:08a |      Rise 10:23p   96%|
     |Mon 30| 06:26a  09:10p  14:44 | 10:27p  05:10a |      Rise 10:51p   91%|
     |Tue 31| 06:27a  09:09p  14:41 | 10:25p  05:11a |      Rise 11:17p   85%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunrise and sunset

Ephemeris of Sky Events is created with my DOS version LookingUp program.

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05/31/2018 – Ephemeris – Previewing June skies

May 31, 2018 Comments off

Ephemeris for Thursday, May 31st. Today the Sun will be up for 15 hours and 19 minutes, setting at 9:20, and it will rise tomorrow at 6:00. The Moon, 2 days past full, will rise at 11:10 this evening.

Let’s preview June skies. There will be a lot of Sun in June and very little night. The daylight hours will increase a bit from 15 hours and 21 minutes Tomorrow to 15 hours and 34 minutes on the 21st, retreating back to 15 hours 31 minutes at month’s end. The altitude of the sun above the southern horizon at local noon will hover around 68 to 69 degrees. Local noon, when the sun is actually due south will occur at about 1:43 p.m. Summer begins on the 21st at 6:07 a.m. when the sun reaches its farthest north. The actual amount of night-time will be quite short mostly due to the length of daylight, but also because twilight lasts much longer than average because the sun sets at a shallow angle. On the 21st there’s theoretically only 3 ½ hours of total darkness.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

June Evening Star Chart

June evening star chart

Star Chart for June 2018 (11 p.m. EDT June 15, 2018). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 4:30 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 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 4:30 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.

June Morning Star Chart

June Morning Star Chart

Star Chart for June 2018 mornings based on 4:30 a.m. June 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations

 

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.

Twilight

Evening nautical twilight ends at 10:46 p.m. EDT on the 1st, increasing to 10:59 p.m. EDT on the 30th.
Evening astronomical twilight ends at 11:44 p.m. EDT on the 1st, increasing to 12:02 a.m. EDT on the 30th.
Morning astronomical twilight starts at 3:44 a.m. EDT on the 1st, and decreasing to 3:38 a.m. EDT on the 30th.
Morning nautical twilight starts at 4:42 a.m. EDT on the 1st, and decreasing to 4:40 a.m. EDT on the 30th.

NASA Calendar of Planetary Events

Date        Time    Event
Jun 01  Fr          Venus: 34.5° E
    01  Fr  3:09 am Moon South Dec.: 20.7° S
    02  Sa 12:34 pm Moon Apogee: 405300 km
    03  Su  7:58 am Moon-Mars: 3.5° S
    03  Su  8:39 am Moon Descending Node
    05  Tu  9:53 pm Mercury Superior Conj.
    06  We  2:32 pm Last Quarter
    07  Th 11:35 pm Venus-Pollux: 4.7° S
    13  We  3:43 pm New Moon
    14  Th  7:55 pm Moon Perigee: 359500 km
    14  Th  8:52 pm Moon North Dec.: 20.8° N
    16  Sa  9:13 am Moon-Venus: 2.3° N
    16  Sa  1:50 pm Moon Ascending Node
    16  Sa  3:38 pm Moon-Beehive: 1.5° N
    18  Mo  3:25 am Moon-Regulus: 1.7° S
    19  Tu 10:23 pm Venus-Beehive: 0.4° N
    20  We  6:51 am First Quarter
    21  Th  6:07 am Summer Solstice
    23  Sa  2:47 pm Moon-Jupiter: 4.6° S
    24  Su  5:35 pm Mercury-Pollux: 4.8° S
    27  We  8:25 am Saturn Opposition
    27  We 11:59 pm Moon-Saturn: 2° S
    28  Th 12:53 am Full Moon
    28  Th 10:30 am Moon South Dec.: 20.8° S
    29  Fr 10:43 pm Moon Apogee: 406100 km
    30  Sa 12:44 pm Moon Descending Node
Jul 01  Su          Venus: 40.7° 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

     LU                  Ephemeris of Sky Events for NMC Observatory
     June, 2018    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Fri  1| 06:00a  09:20p  15:20 | 10:43p  04:37a |      Rise 11:56p   90%|
     |Sat  2| 05:59a  09:21p  15:21 | 10:44p  04:36a |      Rise 12:38a   83%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  3| 05:59a  09:22p  15:22 | 10:45p  04:36a |      Rise 01:14a   75%|
     |Mon  4| 05:59a  09:22p  15:23 | 10:46p  04:35a |      Rise 01:46a   67%|
     |Tue  5| 05:58a  09:23p  15:25 | 10:47p  04:34a |      Rise 02:15a   58%|
     |Wed  6| 05:58a  09:24p  15:26 | 10:48p  04:34a |L Qtr Rise 02:43a   48%|
     |Thu  7| 05:57a  09:25p  15:27 | 10:49p  04:33a |      Rise 03:10a   38%|
     |Fri  8| 05:57a  09:25p  15:28 | 10:50p  04:33a |      Rise 03:37a   28%|
     |Sat  9| 05:57a  09:26p  15:28 | 10:51p  04:32a |      Rise 04:06a   19%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 10| 05:57a  09:26p  15:29 | 10:52p  04:32a |      Rise 04:39a   11%|
     |Mon 11| 05:57a  09:27p  15:30 | 10:52p  04:31a |      Rise 05:17a    5%|
     |Tue 12| 05:56a  09:28p  15:31 | 10:53p  04:31a |      Rise 06:02a    1%|
     |Wed 13| 05:56a  09:28p  15:31 | 10:54p  04:31a |New   Set  09:20p    0%|
     |Thu 14| 05:56a  09:29p  15:32 | 10:54p  04:31a |      Set  10:26p    2%|
     |Fri 15| 05:56a  09:29p  15:32 | 10:55p  04:31a |      Set  11:25p    7%|
     |Sat 16| 05:56a  09:29p  15:33 | 10:55p  04:30a |      Set  12:14a   14%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 17| 05:56a  09:30p  15:33 | 10:56p  04:30a |      Set  12:55a   24%|
     |Mon 18| 05:56a  09:30p  15:33 | 10:56p  04:30a |      Set  01:30a   34%|
     |Tue 19| 05:56a  09:30p  15:33 | 10:56p  04:31a |      Set  02:01a   45%|
     |Wed 20| 05:57a  09:31p  15:33 | 10:57p  04:31a |F Qtr Set  02:29a   56%|
     |Thu 21| 05:57a  09:31p  15:33 | 10:57p  04:31a |      Set  02:57a   66%|
     |Fri 22| 05:57a  09:31p  15:33 | 10:57p  04:31a |      Set  03:24a   76%|
     |Sat 23| 05:57a  09:31p  15:33 | 10:57p  04:31a |      Set  03:54a   84%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 24| 05:58a  09:31p  15:33 | 10:57p  04:32a |      Set  04:26a   90%|
     |Mon 25| 05:58a  09:31p  15:33 | 10:57p  04:32a |      Set  05:02a   95%|
     |Tue 26| 05:58a  09:31p  15:32 | 10:57p  04:33a |      Set  05:42a   99%|
     |Wed 27| 05:59a  09:31p  15:32 | 10:57p  04:33a |      Set  06:27a  100%|
     |Thu 28| 05:59a  09:31p  15:31 | 10:57p  04:34a |Full  Rise 09:54p   99%|
     |Fri 29| 06:00a  09:31p  15:31 | 10:56p  04:34a |      Rise 10:37p   97%|
     |Sat 30| 06:00a  09:31p  15:30 | 10:56p  04:35a |      Rise 11:15p   93%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunrise and sunset

 

05/01/2018 – Ephemeris – Previewing May Skies

May 1, 2018 Comments off

Ephemeris for Tuesday, the first day of May. The Sun rises at 6:32. It’ll be up for 14 hours and 15 minutes, setting at 8:47. The Moon, 2 days past full, will rise at 10:32 this evening.

They say April showers bring May flowers, but I don’t think they meant snow showers. Daylight hours in the Interlochen/Traverse City area will increase from 14 hours and 15 minutes today 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 today 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. this Saturday morning the 5th, but the bright morning Moon will interfere.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

May Evening Sky Chart

May evening star chart

Star Chart for May 2018 (11 p.m. EDT May 15, 2018). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 11 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. (An hour 45 minutes behind our daylight saving time meridian during EDT and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time.

Note the chart times of 11 p.m. and 5 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.

May Morning Star Chart

May Morning Star Chart

Star Chart for May 2018 mornings based on 5 a.m. May 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.
  • EAqr is the Eta Aquariid meteor shower radiant.  This shower will be plagued by a waning gibbous moon. It will be addressed in the May 3rd program.  This is a shower of bits from Halley’s Comet.

Twilight

Evening nautical twilight ends at 10:02 p.m. EDT on the 1st, increasing to 10:44 p.m. EDT on the 31st.
Evening astronomical twilight ends at 10:46 p.m. EDT on the 1st, increasing to 11:42 p.m. EDT on the 31st.
Morning astronomical twilight starts at 4:40 a.m. EDT on the 1st, and decreasing to 3:45 a.m. EDT on the 31st.
Morning nautical twilight starts at 5:25 a.m. EDT on the 1st, and decreasing to 4:44 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

    Date    Time    Event
May 01  Tu          Venus: 27.2° E
    02  We  9:24 am Venus-Aldebaran: 6.4° N
    04  Fr  4:31 pm Moon-Saturn: 1.9° S
    04  Fr  7:00 pm Moon South Dec.: 20.6° S
    05  Sa  3:03 am Eta Aquarid Shower: ZHR = 60
    05  Sa  8:35 pm Moon Apogee: 404500 km
    06  Su  3:24 am Moon-Mars: 3° S
    07  Mo  6:24 am Moon Descending Node
    07  Mo 10:09 pm Last Quarter
    08  Tu  8:10 pm Jupiter Opposition
    13  Su  1:21 pm Moon-Mercury: 2.5° N
    15  Tu  7:48 am New Moon
    17  Th  2:11 pm Moon-Venus: 4.8° N
    17  Th  5:06 pm Moon Perigee: 363800 km
    18  Fr 11:02 am Moon North Dec.: 20.7° N
    20  Su  7:57 am Moon-Beehive: 1.7° N
    20  Su  9:13 am Moon Ascending Node
    21  Mo  8:53 pm Moon-Regulus: 1.5° S
    21  Mo 11:49 pm First Quarter
    27  Su  1:39 pm Moon-Jupiter: 4.3° S
    29  Tu 10:20 am Full Moon
    31  Th  9:20 pm Moon-Saturn: 1.8° S
Jun 01  Fr          Venus: 34.5° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     May, 2018    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Tue  1| 06:32a  08:47p  14:15 | 10:00p  05:20a |      Rise 10:32p   96%|
     |Wed  2| 06:31a  08:49p  14:17 | 10:01p  05:18a |      Rise 11:31p   91%|
     |Thu  3| 06:29a  08:50p  14:20 | 10:03p  05:17a |      Rise 12:26a   85%|
     |Fri  4| 06:28a  08:51p  14:23 | 10:04p  05:15a |      Rise 01:15a   78%|
     |Sat  5| 06:27a  08:52p  14:25 | 10:06p  05:13a |      Rise 02:00a   69%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  6| 06:25a  08:53p  14:28 | 10:07p  05:12a |      Rise 02:39a   60%|
     |Mon  7| 06:24a  08:55p  14:30 | 10:09p  05:10a |L Qtr Rise 03:14a   51%|
     |Tue  8| 06:23a  08:56p  14:33 | 10:11p  05:08a |      Rise 03:45a   41%|
     |Wed  9| 06:21a  08:57p  14:35 | 10:12p  05:06a |      Rise 04:14a   32%|
     |Thu 10| 06:20a  08:58p  14:38 | 10:14p  05:05a |      Rise 04:42a   23%|
     |Fri 11| 06:19a  08:59p  14:40 | 10:15p  05:03a |      Rise 05:09a   15%|
     |Sat 12| 06:18a  09:00p  14:42 | 10:17p  05:02a |      Rise 05:38a    8%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 13| 06:16a  09:02p  14:45 | 10:18p  05:00a |      Rise 06:09a    3%|
     |Mon 14| 06:15a  09:03p  14:47 | 10:20p  04:59a |      Rise 06:45a    1%|
     |Tue 15| 06:14a  09:04p  14:49 | 10:21p  04:57a |New   Set  09:20p    1%|
     |Wed 16| 06:13a  09:05p  14:52 | 10:23p  04:56a |      Set  10:32p    3%|
     |Thu 17| 06:12a  09:06p  14:54 | 10:24p  04:54a |      Set  11:40p    9%|
     |Fri 18| 06:11a  09:07p  14:56 | 10:26p  04:53a |      Set  12:41a   17%|
     |Sat 19| 06:10a  09:08p  14:58 | 10:27p  04:51a |      Set  01:33a   26%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 20| 06:09a  09:09p  15:00 | 10:29p  04:50a |      Set  02:17a   37%|
     |Mon 21| 06:08a  09:10p  15:02 | 10:30p  04:49a |F Qtr Set  02:55a   48%|
     |Tue 22| 06:07a  09:12p  15:04 | 10:32p  04:47a |      Set  03:27a   59%|
     |Wed 23| 06:06a  09:13p  15:06 | 10:33p  04:46a |      Set  03:56a   70%|
     |Thu 24| 06:05a  09:14p  15:08 | 10:34p  04:45a |      Set  04:24a   79%|
     |Fri 25| 06:05a  09:15p  15:09 | 10:36p  04:44a |      Set  04:52a   87%|
     |Sat 26| 06:04a  09:16p  15:11 | 10:37p  04:43a |      Set  05:20a   93%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 27| 06:03a  09:16p  15:13 | 10:38p  04:42a |      Set  05:51a   97%|
     |Mon 28| 06:02a  09:17p  15:15 | 10:39p  04:41a |      Set  06:24a   99%|
     |Tue 29| 06:02a  09:18p  15:16 | 10:41p  04:40a |Full  Rise 09:21p  100%|
     |Wed 30| 06:01a  09:19p  15:18 | 10:42p  04:39a |      Rise 10:18p   98%|
     |Thu 31| 06:00a  09:20p  15:19 | 10:43p  04:38a |      Rise 11:10p   95%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunset and sunrise

 

03/30/2018 – Ephemeris – Previewing April skies

March 30, 2018 Comments off

Ephemeris for Good Friday, Friday, March 30th. The Sun will rise at 7:27. It’ll be up for 12 hours and 40 minutes, setting at 8:07. The Moon, 1 day before full, will set at 7:50 tomorrow morning.

The 4th month of the year begins on Sunday. Daylight hours in the Interlochen/Traverse City area and will increase from 12 hours and 46 minutes Sunday to 14 hours 12 minutes on April 30th. The altitude, or angle, of the Sun above the southern horizon at local noon will be 50 degrees Sunday and will ascend to 60 degrees on April 30th. The altitude of the Sun in the Straits area will be a degree lower. 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 it’s peak on the early afternoon of the 22nd. So the early morning hours between 3 and 5 a.m. are the best time to see it when the Moon has set and the radiant is high in the sky.

Addendum

April Evening Sky Chart

April evening star chart

Star Chart for April 2018 (10 p.m. EDT April 15, 2018). 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 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. (An hour 45 minutes behind our daylight saving time meridian during EDT and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time.

Note the chart times of 10 p.m. and 5 a.m. are for the 15th. For each week before the 15th add ½ hour (28 minutes if you’re picky). Watch out for the time change. 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.

April Morning Star Chart

April Morning Star Chart

Star Chart for April 2018 mornings based on 5 a.m. April 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.
  • LyrR is the Lyrid meteor shower radiant.  The Lyrid meteor shower will reach its peak for us on the morning of the 22nd. The actual peak time is variable for this shower and can occur as early as 6 a.m. to as late as 5 p.m. Also the peak numbers of meteors are variable. Best time to observe without the Moon is between 3 a.m. and the start of twilight.

Twilight

Evening nautical twilight ends at 9:17 p.m. EDT on the 1st, increasing to 10:00 p.m. EDT on the 30th.
Evening astronomical twilight ends at 9:54 p.m. EDT on the 1st, increasing to 10:44 p.m. EDT on the 30th.
Morning astronomical twilight starts at 5:47 a.m. EDT on the 1st, and decreasing to 4:43 a.m. EDT on the 30th.
Morning nautical twilight starts at 6:23 a.m. EDT on the 1st, and decreasing to 5:27 a.m. EDT on the 30th.

NASA Calendar of Planetary Events

    Date    Time    Event
Apr 01  Su          Venus: 19.9° E
    01  Su  1:47 pm Mercury Inferior Conj.
    02  Mo  3:02 pm Mars-Saturn: 1.3° N
    03  Tu 10:14 am Moon-Jupiter: 4.2° S
    07  Sa  8:50 am Moon-Saturn: 2.1° S
    07  Sa 10:37 am Moon South Dec.: 20.3° S
    07  Sa  2:15 pm Moon-Mars: 3.5° S
    08  Su  1:32 am Moon Apogee: 404100 km
    08  Su  3:18 am Last Quarter
    10  Tu  4:09 am Moon Descending Node
    15  Su  9:57 pm New Moon
    17  Tu  3:29 pm Moon-Venus: 5.5° N
    18  We 10:35 am Uranus Conjunction
    19  Th 12:45 am Moon-Aldebaran: 1.1° S
    20  Fr 10:44 am Moon Perigee: 368700 km
    21  Sa  3:38 am Moon North Dec.: 20.4° N
    22  Su  1:49 pm Lyrid Shower: ZHR = 20
    22  Su  5:46 pm First Quarter
    23  Mo  2:17 am Moon-Beehive: 2° N
    23  Mo  8:19 am Moon Ascending Node
    24  Tu 12:47 pm Venus-Pleiades: 3.5° S
    24  Tu  3:39 pm Moon-Regulus: 1.2° S
    29  Su  1:59 pm Mercury Elongation: 27° W
    29  Su  8:58 pm Full Moon
    30  Mo  1:16 pm Moon-Jupiter: 4.1° S
May 01  Tu          Venus: 27.2° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     April, 2018    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Sun  1| 07:23a  08:10p  12:46 | 09:15p  06:19a |      Rise 09:35p   97%|
     |Mon  2| 07:21a  08:11p  12:49 | 09:16p  06:17a |      Rise 10:40p   93%|
     |Tue  3| 07:19a  08:12p  12:53 | 09:18p  06:15a |      Rise 11:44p   87%|
     |Wed  4| 07:18a  08:14p  12:56 | 09:19p  06:13a |      Rise 12:44a   80%|
     |Thu  5| 07:16a  08:15p  12:59 | 09:20p  06:11a |      Rise 01:41a   71%|
     |Fri  6| 07:14a  08:16p  13:02 | 09:22p  06:09a |      Rise 02:33a   62%|
     |Sat  7| 07:12a  08:17p  13:05 | 09:23p  06:07a |      Rise 03:20a   53%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  8| 07:10a  08:19p  13:08 | 09:25p  06:05a |L Qtr Rise 04:03a   43%|
     |Mon  9| 07:09a  08:20p  13:11 | 09:26p  06:03a |      Rise 04:40a   34%|
     |Tue 10| 07:07a  08:21p  13:14 | 09:28p  06:01a |      Rise 05:14a   25%|
     |Wed 11| 07:05a  08:22p  13:17 | 09:29p  05:59a |      Rise 05:45a   17%|
     |Thu 12| 07:03a  08:24p  13:20 | 09:31p  05:57a |      Rise 06:14a   11%|
     |Fri 13| 07:01a  08:25p  13:23 | 09:32p  05:55a |      Rise 06:42a    5%|
     |Sat 14| 07:00a  08:26p  13:26 | 09:34p  05:53a |      Rise 07:10a    2%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 15| 06:58a  08:27p  13:29 | 09:35p  05:51a |New   Set  08:05p    0%|
     |Mon 16| 06:56a  08:29p  13:32 | 09:37p  05:49a |      Set  09:16p    1%|
     |Tue 17| 06:55a  08:30p  13:35 | 09:38p  05:47a |      Set  10:27p    5%|
     |Wed 18| 06:53a  08:31p  13:38 | 09:40p  05:45a |      Set  11:38p   11%|
     |Thu 19| 06:51a  08:32p  13:41 | 09:41p  05:43a |      Set  12:47a   19%|
     |Fri 20| 06:50a  08:34p  13:44 | 09:43p  05:41a |      Set  01:50a   29%|
     |Sat 21| 06:48a  08:35p  13:47 | 09:44p  05:39a |      Set  02:46a   40%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 22| 06:46a  08:36p  13:49 | 09:46p  05:37a |F Qtr Set  03:34a   51%|
     |Mon 23| 06:45a  08:37p  13:52 | 09:47p  05:35a |      Set  04:15a   62%|
     |Tue 24| 06:43a  08:39p  13:55 | 09:49p  05:33a |      Set  04:51a   73%|
     |Wed 25| 06:41a  08:40p  13:58 | 09:50p  05:31a |      Set  05:22a   82%|
     |Thu 26| 06:40a  08:41p  14:01 | 09:52p  05:29a |      Set  05:52a   90%|
     |Fri 27| 06:38a  08:42p  14:04 | 09:53p  05:28a |      Set  06:20a   95%|
     |Sat 28| 06:37a  08:44p  14:06 | 09:55p  05:26a |      Set  06:48a   99%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 29| 06:35a  08:45p  14:09 | 09:57p  05:24a |Full  Rise 08:25p  100%|
     |Mon 30| 06:34a  08:46p  14:12 | 09:58p  05:22a |      Rise 09:30p   99%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunset and sunrise

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

03/01/2018 – Ephemeris – Previewing March skies

March 1, 2018 Comments off

Ephemeris for Thursday, March 1st. The Sun will rise at 7:20. It’ll be up for 11 hours and 10 minutes, setting at 6:30. The Moon, at full today, will rise at 6:16 this evening.

Let’s look at the skies for the month of March. The Sun will pass 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 12:49 p.m. and an hour later when daylight time starts. Spring will begin on the 20th at 12:15 p.m. Daylight Time, which now rules most of the year will start on the 11th.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addendum

March Evening Sky Chart

March evening star chart

Star Chart for March 2018 (10 p.m. EDT March 15, 2018). 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. (An hour 45 minutes behind our daylight saving time meridian. during EDT and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time if you are near your time meridian.  Note that Daylight time starts at 2 a.m. Sunday March 11th for most US states.

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). Watch out for the time change. 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.

March Morning Star Chart

March Morning Star Chart

Star Chart for March 2018 mornings based on 6 a.m. March 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations
  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.

Twilight

Evening nautical twilight ends at 7:32 p.m. EST on the 1st, increasing to 9:16 p.m. EDT on the 31st.
Evening astronomical twilight ends at 8:06 p.m. EST on the 1st, increasing to 9:52 p.m. EDT on the 31st.
Morning astronomical twilight starts at 5:44 a.m. EST on the 1st, and decreasing to 5:49 a.m. EDT on the 31st.
Morning nautical twilight starts at 6:17 a.m. EST on the 1st, and decreasing to 6:25 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

    Date    Time    Event
Mar 01  Th          Venus: 12.4° E
    01  Th 12:09 am Moon-Regulus: 0.9° S
    01  Th  7:51 pm Full Moon (Worm Moon)
    04  Su  8:32 am Neptune Solar Conjunction
    07  We  1:57 am Moon-Jupiter: 4.4° S
    09  Fr  6:20 am Last Quarter
    09  Fr  7:37 pm Moon-Mars: 4.2° S
    10  Sa  9:37 pm Moon-Saturn: 2.5° S
    11  Su  1:39 am Moon South Dec.: 20.1° S
    11  Su  2:00 am Daylight Saving Time begins
    11  Su  4:13 am Moon Apogee: 404700 km
    13  Tu 11:48 pm Moon Descending Node
    15  Th 10:59 am Mercury Greatest Eastern Elongation: 18.4°
    17  Sa  9:12 am New Moon
    18  Su  3:07 pm Moon-Venus: 3.9° N
    19  Mo  3:51 am Mercury-Venus: 3.8° N
    20  Tu 12:15 pm Vernal Equinox
    22  Th  6:33 pm Moon-Aldebaran: 0.9° S
    24  Sa 11:35 am First Quarter
    24  Sa 10:04 pm Moon North Dec.: 20.2° N
    26  Mo  1:17 pm Moon Perigee: 369100 km
    26  Mo  8:52 pm Moon-Beehive: 2.2° N
    27  Tu  6:56 am Moon Ascending Node
    28  We  9:38 am Moon-Regulus: 1° S
    31  Sa  8:37 am Full Moon (Blue Moon)
Apr 01  Su          Venus: 19.9° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     March, 2018    Local time zone: EST
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Thu  1| 07:20a  06:30p  11:10 | 07:33p  06:17a |Full  Rise 06:16p  100%|
     |Fri  2| 07:18a  06:31p  11:13 | 07:35p  06:15a |      Rise 07:29p   99%|
     |Sat  3| 07:16a  06:33p  11:16 | 07:36p  06:13a |      Rise 08:40p   95%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  4| 07:15a  06:34p  11:19 | 07:37p  06:12a |      Rise 09:48p   89%|
     |Mon  5| 07:13a  06:35p  11:22 | 07:38p  06:10a |      Rise 10:53p   82%|
     |Tue  6| 07:11a  06:37p  11:25 | 07:40p  06:08a |      Rise 11:57p   73%|
     |Wed  7| 07:09a  06:38p  11:28 | 07:41p  06:06a |      Rise 12:58a   64%|
     |Thu  8| 07:07a  06:39p  11:31 | 07:42p  06:05a |      Rise 01:56a   55%|
     |Fri  9| 07:06a  06:41p  11:35 | 07:44p  06:03a |L Qtr Rise 02:50a   45%|
     |Sat 10| 07:04a  06:42p  11:38 | 07:45p  06:01a |      Rise 03:40a   36%|
     +------+-----------------------+----------------+-----------------------+
     | EDT  |      Time Change      |                |                       |
     |Sun 11| 08:02a  07:43p  11:41 | 08:46p  06:59a |      Rise 05:25a   27%|
     |Mon 12| 08:00a  07:45p  11:44 | 08:48p  06:57a |      Rise 06:05a   19%|
     |Tue 13| 07:58a  07:46p  11:47 | 08:49p  06:55a |      Rise 06:42a   12%|
     |Wed 14| 07:57a  07:47p  11:50 | 08:50p  06:54a |      Rise 07:15a    7%|
     |Thu 15| 07:55a  07:48p  11:53 | 08:52p  06:52a |      Rise 07:45a    3%|
     |Fri 16| 07:53a  07:50p  11:56 | 08:53p  06:50a |      Rise 08:13a    0%|
     |Sat 17| 07:51a  07:51p  12:00 | 08:54p  06:48a |New   Set  08:06p    0%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 18| 07:49a  07:52p  12:03 | 08:56p  06:46a |      Set  09:13p    2%|
     |Mon 19| 07:47a  07:54p  12:06 | 08:57p  06:44a |      Set  10:21p    7%|
     |Tue 20| 07:45a  07:55p  12:09 | 08:58p  06:42a |      Set  11:30p   13%|
     |Wed 21| 07:44a  07:56p  12:12 | 09:00p  06:40a |      Set  12:39a   22%|
     |Thu 22| 07:42a  07:57p  12:15 | 09:01p  06:38a |      Set  01:48a   32%|
     |Fri 23| 07:40a  07:59p  12:18 | 09:02p  06:36a |      Set  02:53a   43%|
     |Sat 24| 07:38a  08:00p  12:21 | 09:04p  06:34a |F Qtr Set  03:54a   54%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 25| 07:36a  08:01p  12:25 | 09:05p  06:32a |      Set  04:47a   65%|
     |Mon 26| 07:34a  08:02p  12:28 | 09:06p  06:30a |      Set  05:34a   76%|
     |Tue 27| 07:32a  08:04p  12:31 | 09:08p  06:28a |      Set  06:14a   85%|
     |Wed 28| 07:31a  08:05p  12:34 | 09:09p  06:26a |      Set  06:49a   92%|
     |Thu 29| 07:29a  08:06p  12:37 | 09:11p  06:25a |      Set  07:21a   97%|
     |Fri 30| 07:27a  08:07p  12:40 | 09:12p  06:23a |      Set  07:50a  100%|
     |Sat 31| 07:25a  08:09p  12:43 | 09:13p  06:21a |Full  Rise 08:27p  100%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunset and sunrise

 

02/01/2018 – Ephemeris – Previewing February skies

February 1, 2018 2 comments

Ephemeris for Thursday, February 1st. The Sun will rise at 8:01. It’ll be up for 9 hours and 49 minutes, setting at 5:51. The Moon, 1 day past full, will rise at 7:30 this evening.

Lets look ahead at our short month of February. It’s so short that this year it has no full moons. To make up for it both January and March have two. 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. Daylight durations are 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. Venus is moving away from the Sun and will become more and more visible after sunset as the month wears on. Today Venus will set 24 minutes after the Sun. This will increase to an hour after the Sun.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addenda

February Evening Sky Chart

February Evening Star Chart

Star Chart for February 2018 (9 p.m. EST February 15, 2018). 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 and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time if you are near your time meridian.

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. 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

February Morning Star Chart

Star Chart for February 2018 mornings based on 6 a.m. February 15th. Created using my LookingUp program. Click on image to enlarge.

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

Star chart annotations

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • Leaky Big 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

Evening nautical twilight ends at 6:58 p.m. EST on the 1st, increasing to 7:31 p.m. EST on the 28th.
Evening astronomical twilight ends at 7:30 p.m. EST on the 1st, increasing to 8:04 p.m. EST on the 28th.
Morning astronomical twilight starts at 6:22 a.m. EST on the 1st, and decreasing to 5:45 a.m. EST on the 28th.
Morning nautical twilight starts at 6:56 a.m. EST on the 1st, and decreasing to 6:19 a.m. EST on the 28th.

NASA Calendar of Planetary Events

    Date    Time    Event
Feb 01 	Th	    Venus: 5.7° E
    01  Th  1:24 pm Moon-Regulus: 0.9° S
    07  We 10:54 am Last Quarter
    07  We  2:47 pm Moon-Jupiter: 4.7° S
    09  Fr 12:12 am Moon-Mars: 4.8° S
    11  Su  9:16 am Moon Apogee: 405700 km
    11  Su  9:46 am Moon-Saturn: 2.7° S
    11  Su 11:40 am Mars-Antares: 5.1° N
    11  Su  6:21 pm Moon South Dec.: 20° S
    14  We  4:11 pm Moon Descending Node
    15  Th  3:52 pm Partial Solar Eclipse - S. America, Antarctica
    15  Th  4:05 pm New Moon
    17  Sa  7:08 am Mercury Superior Conj.
    23  Fr  3:09 am First Quarter
    23  Fr 12:07 pm Moon-Aldebaran: 0.7° S
    25  Su  3:07 pm Moon North Dec.: 20.1° N
    27  Tu  9:48 pm Moon Perigee: 363900 km
    27  Tu 12:28 pm Moon-Beehive: 2.3° N
    28  We 12:03 am Moon Ascending Node
Mar 01  Th          Venus: 12.4° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     February, 2018    Local time zone: EST
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Thu  1| 08:01a  05:51p  09:49 | 06:57p  06:55a |      Rise 07:30p   97%|
     |Fri  2| 08:00a  05:52p  09:52 | 06:58p  06:54a |      Rise 08:43p   92%|
     |Sat  3| 07:59a  05:54p  09:54 | 07:00p  06:53a |      Rise 09:53p   85%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  4| 07:58a  05:55p  09:57 | 07:01p  06:52a |      Rise 11:01p   76%|
     |Mon  5| 07:57a  05:57p  10:00 | 07:02p  06:51a |      Rise 12:06a   66%|
     |Tue  6| 07:55a  05:58p  10:02 | 07:04p  06:50a |      Rise 01:09a   57%|
     |Wed  7| 07:54a  06:00p  10:05 | 07:05p  06:49a |L Qtr Rise 02:10a   47%|
     |Thu  8| 07:53a  06:01p  10:08 | 07:06p  06:48a |      Rise 03:09a   37%|
     |Fri  9| 07:51a  06:02p  10:11 | 07:07p  06:46a |      Rise 04:05a   28%|
     |Sat 10| 07:50a  06:04p  10:13 | 07:09p  06:45a |      Rise 04:57a   20%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 11| 07:48a  06:05p  10:16 | 07:10p  06:44a |      Rise 05:45a   13%|
     |Mon 12| 07:47a  06:07p  10:19 | 07:11p  06:42a |      Rise 06:29a    8%|
     |Tue 13| 07:46a  06:08p  10:22 | 07:13p  06:41a |      Rise 07:07a    3%|
     |Wed 14| 07:44a  06:09p  10:25 | 07:14p  06:40a |      Rise 07:42a    1%|
     |Thu 15| 07:43a  06:11p  10:28 | 07:15p  06:38a |New   Set  06:07p    0%|
     |Fri 16| 07:41a  06:12p  10:31 | 07:16p  06:37a |      Set  07:09p    1%|
     |Sat 17| 07:40a  06:14p  10:34 | 07:18p  06:36a |      Set  08:13p    5%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 18| 07:38a  06:15p  10:37 | 07:19p  06:34a |      Set  09:17p   10%|
     |Mon 19| 07:36a  06:16p  10:40 | 07:20p  06:33a |      Set  10:23p   17%|
     |Tue 20| 07:35a  06:18p  10:43 | 07:22p  06:31a |      Set  11:29p   25%|
     |Wed 21| 07:33a  06:19p  10:46 | 07:23p  06:30a |      Set  12:38a   35%|
     |Thu 22| 07:32a  06:21p  10:49 | 07:24p  06:28a |      Set  01:46a   46%|
     |Fri 23| 07:30a  06:22p  10:52 | 07:25p  06:27a |F Qtr Set  02:54a   57%|
     |Sat 24| 07:28a  06:23p  10:55 | 07:27p  06:25a |      Set  04:00a   69%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 25| 07:27a  06:25p  10:58 | 07:28p  06:23a |      Set  04:59a   79%|
     |Mon 26| 07:25a  06:26p  11:01 | 07:29p  06:22a |      Set  05:52a   88%|
     |Tue 27| 07:23a  06:27p  11:04 | 07:31p  06:20a |      Set  06:38a   94%|
     |Wed 28| 07:22a  06:29p  11:07 | 07:32p  06:18a |      Set  07:17a   99%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunset and sunrise

 

12/31/2017 – Ephemeris Extra – January 2018 preview

December 31, 2017 Comments off

This isn’t going to be recorded as an actual program.  I’m not sure how much information one could retain at 6 or 7 New Years Day morning.

Year end is a busy time astronomically with Earth’s perihelion and the Quadrantid meteor shower following rapidly on New Years day

Let’s look ahead at January 2018. Tuesday the 2nd is the date of the latest sunrise. The Sun is already beginning to head north, as can be seen in the sunset time on the 1st, 11 minutes later than at its earliest three weeks ago. Both sunrise and sunset will be moving in January with sunrise time at 8:20 a.m. and sunset time at 5:12 p.m. on the 1st moving to 8:02 a.m. and 5:50 p.m. at month’s end. The sun’s altitude at noon will increase from 22 degrees on the 1st to nearly 28 degrees by the 31st. The Earth will reach its closest to the Sun in its orbit, called perihelion, on the 2nd at 91.4 million miles (147.1 million km).

We’ll have a full moon on the 1st and the 31st, the so-called blue moon.  Both those moons will be super moons, occurring at or near perigee.  On  top of all that the  full moon on the 31st will be totally eclipsed.  We in Michigan will see nearly the first half of the eclipse before the Moon sets at 8:04 in the grand Traverse area.  Folks farther west will see more, if not all of the eclipse. February will have no full moons, so March again will have two full moons.

The Quadrantid meteor shower will reach peak on the 3rd, in the afternoon.  The radiant is circumpolar here, being off the handle of the Big Dipper.  Mercury will reach its greatest western elongation on the 1st and be visible shortly before sunrise for the next week rising after 6:30, but brightening a bit each day.  It’s not a particularly favorable elongation, now that winter is here.  The next evening elongation in  March will be a lot better.  Venus will be in superior conjunction with the Sun on the 9th and will enter the evening sky, but don’t look for it this month.  Mars and Jupiter will have a close conjunction on the 6th.  It will look about equally OK on the morning of the 6th or 7th around here because it occurs on the evening of the 6th, when they are not up.

Addenda

January Evening Sky Chart

January Evening Star Chart

Star Chart for January 2018 (9 p.m. January 15, 2018). 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 and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time if you are near your time meridian.

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. 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.

January Morning Star Chart

January Morning Star Chart

Star Chart for January 2018 mornings based on 6 a.m. January 15th. 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.
  • Leaky Big Dipper drips on Leo.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus.
  • The Summer Triangle is in red
  • QuadR is the Quadrantid meteor shower radiant. Peaks on January 2nd, but the almost full moon will interfere this year.

Twilight

Evening nautical twilight ends at 6:22 p.m. EST on the 1st, increasing to 6:55 p.m. EST on the 31st.
Evening astronomical twilight ends at 6:57 p.m. EST on the 1st, increasing to 7:29 p.m. EST on the 31st.
Morning astronomical twilight starts at 6:35 a.m. EST on the 1st, and decreasing to 6:23 a.m. EST on the 31st.
Morning nautical twilight starts at 7:10 a.m. EST on the 1st, and decreasing to 6:57 a.m. EST on the 31st.

NASA Calendar of Planetary Events

    Date    Time    Event
Jan 01  Mo          Venus: 1.9° W
    01  Mo  2:59 pm Mercury Elongation: 22.7° W
    01  Mo  4:54 pm Moon Perigee: 356600 km
    01  Mo  7:01 pm Moon North Dec.: 20.1° N
    01  Mo  9:24 pm Full Moon
    02  Tu  9:59 pm Perihelion: 0.9833 AU
    03  We  2:50 pm Moon-Beehive: 2.3° N
    03  We  3:19 pm Quadrantid Meteor Shower: ZHR = 120
    04  Th  2:48 am Moon Ascending Node
    05  Fr  2:24 am Moon-Regulus: 0.9° S
    06  Sa  7:39 pm Mars-Jupiter: 0.2° N
    08  Mo  5:25 pm Last Quarter
    09  Tu  1:16 am Venus Superior Conjunction w/Sun
    11  Th 12:59 am Moon-Jupiter: 4.7° S
    13  Sa  2:58 am Mercury-Saturn: 0.7° N
    14  Su  9:09 pm Moon Apogee: 406500 km
    14  Su  9:13 pm Moon-Saturn: 2.9° S
    15  Mo 11:28 am Moon South Dec.: 20° S
    16  Tu  9:17 pm New Moon
    18  Th  9:28 am Moon Descending Node
    24  We  5:20 pm First Quarter
    27  Sa  5:09 am Moon-Aldebaran: 0.7° S
    29  Mo  6:32 am Moon North Dec.: 20° N
    30  Tu  4:54 am Moon Perigee: 359000 km
    31  We  2:19 am Moon-Beehive: 2.3° N
    31  We  8:27 am Full Moon
    31  We  8:30 am Total Lunar Eclipse (See Below)
    31  We  1:46 pm Moon Ascending Node
Feb 01  Th          Venus: 5.7° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
     January, 2018    Local time zone: EST
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Mon  1| 08:20a  05:13p  08:52 | 06:23p  07:09a |Full  Rise 05:11p  100%|
     |Tue  2| 08:20a  05:13p  08:53 | 06:24p  07:09a |      Rise 06:18p   99%|
     |Wed  3| 08:20a  05:14p  08:54 | 06:25p  07:10a |      Rise 07:30p   95%|
     |Thu  4| 08:20a  05:15p  08:55 | 06:25p  07:10a |      Rise 08:44p   88%|
     |Fri  5| 08:19a  05:16p  08:56 | 06:26p  07:10a |      Rise 09:56p   80%|
     |Sat  6| 08:19a  05:17p  08:58 | 06:27p  07:09a |      Rise 11:05p   70%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  7| 08:19a  05:19p  08:59 | 06:28p  07:09a |      Rise 12:12a   60%|
     |Mon  8| 08:19a  05:20p  09:00 | 06:29p  07:09a |L Qtr Rise 01:17a   49%|
     |Tue  9| 08:19a  05:21p  09:02 | 06:30p  07:09a |      Rise 02:19a   39%|
     |Wed 10| 08:18a  05:22p  09:03 | 06:31p  07:09a |      Rise 03:20a   30%|
     |Thu 11| 08:18a  05:23p  09:05 | 06:32p  07:09a |      Rise 04:19a   22%|
     |Fri 12| 08:18a  05:24p  09:06 | 06:33p  07:08a |      Rise 05:16a   14%|
     |Sat 13| 08:17a  05:25p  09:08 | 06:34p  07:08a |      Rise 06:11a    8%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 14| 08:17a  05:27p  09:10 | 06:36p  07:08a |      Rise 07:02a    4%|
     |Mon 15| 08:16a  05:28p  09:11 | 06:37p  07:07a |      Rise 07:49a    1%|
     |Tue 16| 08:15a  05:29p  09:13 | 06:38p  07:07a |New   Set  05:21p    0%|
     |Wed 17| 08:15a  05:31p  09:15 | 06:39p  07:06a |      Set  06:17p    1%|
     |Thu 18| 08:14a  05:32p  09:17 | 06:40p  07:06a |      Set  07:15p    3%|
     |Fri 19| 08:14a  05:33p  09:19 | 06:41p  07:05a |      Set  08:15p    8%|
     |Sat 20| 08:13a  05:34p  09:21 | 06:42p  07:05a |      Set  09:17p   14%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 21| 08:12a  05:36p  09:23 | 06:44p  07:04a |      Set  10:20p   21%|
     |Mon 22| 08:11a  05:37p  09:25 | 06:45p  07:04a |      Set  11:24p   30%|
     |Tue 23| 08:10a  05:38p  09:28 | 06:46p  07:03a |      Set  12:30a   40%|
     |Wed 24| 08:10a  05:40p  09:30 | 06:47p  07:02a |F Qtr Set  01:38a   51%|
     |Thu 25| 08:09a  05:41p  09:32 | 06:48p  07:01a |      Set  02:48a   62%|
     |Fri 26| 08:08a  05:43p  09:34 | 06:50p  07:01a |      Set  03:59a   72%|
     |Sat 27| 08:07a  05:44p  09:37 | 06:51p  07:00a |      Set  05:09a   82%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 28| 08:06a  05:45p  09:39 | 06:52p  06:59a |      Set  06:14a   90%|
     |Mon 29| 08:05a  05:47p  09:42 | 06:53p  06:58a |      Set  07:13a   96%|
     |Tue 30| 08:04a  05:48p  09:44 | 06:55p  06:57a |      Set  08:04a  100%|
     |Wed 31| 08:02a  05:50p  09:47 | 06:56p  06:56a |Full  Rise 06:15p  100%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunrise and sunset

Total Lunar Eclipse January 31, 2018

Lunar Eclipse January 31, 2018

I’ll have more on this toward the end of the month. Credit NASA.

The original page for this graphic is:  https://eclipse.gsfc.nasa.gov/LEplot/LEplot2001/LE2018Jan31T.pdf

    Total Lunar Eclipse January 31
Event               Time EST   Time UT
                    GT Area    
Enter penumbra      5:51 a.m.  10:51   Unseen
Begin partial phase 6:48 a.m.  11:48
Totality begins     7:51 a.m.  12:51
Moon sets           8:04 a.m.
Mid eclipse                    13:28
Totality ends                  14:07
End partial phase              15:11
Leave penumbra                 16:08   Unseen

The shading of the penumbra is generally seen within 1/2
hour before and after the partial begins and ends.

Update

Lunch time at the bird feeder

Our bird feeder at about 2 p.m. It was cleaned off and filled 6 hours before. Dining are a downy woodpecker, behind the suet block; a flicker with a seed in its beak and three chickadees. Can you spot the third?

While I was writing this post on the afternoon of the 30th, we were getting a rather intense lake effect snow storm, at about an inch an hour.  By nightfall the snow on top of the feeder just about reached the hook.  We also get cardinals, blue jays, sparrows.   Poor juncos.  They seem to feed on the ground, and the snow came too fast and covered the seed that had dropped, so they were looking in vain.

I really love the chickadees, they’re fearless.  When I’m filling the bird feeder the other birds scatter, but the chickadees sit in the tree, a couple of feet over my head and wait patiently until I hang it back up.