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07/01/2019 – Ephemeris – Previewing July skies

July 1, 2019 Comments off

Ephemeris for Monday, July 1st. Today the Sun will be up for 15 hours and 31 minutes, setting at 9:32, and it will rise tomorrow at 6:01. The Moon, 1 day before new, will rise at 5:49 tomorrow morning.

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 31 minutes today to 14 hours 42 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 it is due south will decrease from 68 degrees now 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 this Friday the 5th. On that day the Earth will reach 94.5 million miles (152.1 million km) from the Sun.

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

Addendum

July Evening Star Chart

July Evening Star Chart

Star Chart for July 2019 (11 p.m. EDT July 15, 2019). 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, 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.

July Morning Star Chart

July 2019 morning star chart

Star Chart for July mornings 2019 (4:30 a.m. EDT July 15, 2019). 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 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.
  • DAqR is the radiant of the South Delta Aquariid meteor shower (Peaks on the 30th)

Twilight Limits, Nautical and Astronomical

EDT
Traverse
City
Morning twilight Evening twilight Dark night Moon
Date Astro. Nautical Nautical Astro. Start End Illum.
2019-07-01 3h37m 4h40m 23h00m 0h03m 0h03m 3h37m 0.02
2019-07-02 3h38m 4h41m 23h00m 0h02m 0h02m 3h38m 0
2019-07-03 3h40m 4h42m 22h59m 0h02m 0h02m 3h40m 0.01
2019-07-04 3h41m 4h43m 22h59m 0h01m 0h01m 3h41m 0.06
2019-07-05 3h42m 4h44m 22h58m 0h00m 0h00m 3h42m 0.13
2019-07-06 3h43m 4h45m 22h58m 23h59m 3h43m 0.22
2019-07-07 3h45m 4h46m 22h57m 23h58m 0h34m 3h45m 0.33
2019-07-08 3h46m 4h47m 22h56m 23h57m 1h03m 3h46m 0.45
2019-07-09 3h48m 4h48m 22h56m 23h55m 1h31m 3h48m 0.56
2019-07-10 3h49m 4h49m 22h55m 23h54m 1h58m 3h49m 0.67
2019-07-11 3h51m 4h50m 22h54m 23h53m 2h26m 3h51m 0.77
2019-07-12 3h52m 4h51m 22h53m 23h52m 2h57m 3h52m 0.86
2019-07-13 3h54m 4h52m 22h52m 23h50m 3h32m 3h54m 0.92
2019-07-14 3h56m 4h53m 22h51m 23h49m 0.92
2019-07-15 3h58m 4h54m 22h50m 23h47m 0.97
2019-07-16 3h59m 4h56m 22h49m 23h46m 1
2019-07-17 4h01m 4h57m 22h48m 23h44m 1
2019-07-18 4h03m 4h58m 22h47m 23h42m 0.98
2019-07-19 4h05m 5h00m 22h46m 23h41m 0.95
2019-07-20 4h07m 5h01m 22h44m 23h39m 23h39m 23h40m 0.89
2019-07-21 4h08m 5h02m 22h43m 23h37m 23h37m 0.83
2019-07-22 4h10m 5h04m 22h42m 23h35m 23h35m 0h04m 0.75
2019-07-23 4h12m 5h05m 22h41m 23h33m 23h33m 0h27m 0.66
2019-07-24 4h14m 5h06m 22h39m 23h32m 23h32m 0h50m 0.56
2019-07-25 4h16m 5h08m 22h38m 23h30m 23h30m 1h14m 0.46
2019-07-26 4h18m 5h09m 22h36m 23h28m 23h28m 1h40m 0.36
2019-07-27 4h20m 5h11m 22h35m 23h26m 23h26m 2h11m 0.26
2019-07-28 4h22m 5h12m 22h33m 23h24m 23h24m 2h48m 0.16
2019-07-29 4h24m 5h14m 22h32m 23h22m 23h22m 3h34m 0.09
2019-07-30 4h26m 5h15m 22h30m 23h20m 23h20m 4h26m 0.03
2019-07-31 4h28m 5h17m 22h29m 23h18m 23h18m 4h28m 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

Jul	1	Mo		        Venus: 12° W
 	2	Tu	 3:16 pm	New Moon
 	2	Tu	 3:23 pm	Total Solar Eclipse
                                        S Pacific, Chile, Argentina
 	2	Tu	 6:02 pm	Moon North Dec.: 22.4° N
 	3	We	 2:53 am	Moon Ascending Node
 	4	Th	 4:34 am	Moon-Mercury: 3.3° S
 	4	Th	 8:53 am	Mercury-Beehive: 4.6° S
 	4	Th	11:02 am	Moon-Beehive: 0.2° S
 	4	Th	 2:59 pm	Aphelion: 1.0168 AU
 	5	Fr	12:54 am	Moon Perigee: 363700 km
 	5	Fr	 7:18 pm	Mercury-Mars: 3.8° N
 	9	Tu	 6:55 am	First Quarter
 	9	Tu	12:12 pm	Saturn Opposition
 	13	Sa	 3:06 am	Mars-Beehive: 0.4° S
 	13	Sa	 3:43 pm	Moon-Jupiter: 2.5° S
 	15	Mo	 6:49 pm	Moon South Dec.: 22.4° S
 	16	Tu	 3:27 am	Moon-Saturn: 0.2° N
 	16	Tu	 5:05 am	Moon Descending Node
 	16	Tu	 5:31 pm	Partial Lunar Eclipse
                                        S America, most of E Hemisphere
 	16	Tu	 5:38 pm	Full Moon
 	20	Sa	 8:01 pm	Moon Apogee: 405500 km
 	21	Su	 8:32 am	Mercury Inferior Conj.
 	24	We	 9:18 pm	Last Quarter
 	27	Sa	 8:47 pm	Moon-Aldebaran: 2.4° S
 	28	Su	10:59 am	Delta Aquarid Shower: ZHR = 20
                                        Intl. Meteor Org. has the peak on the 30th.
 	30	Tu	 4:10 am	Moon North Dec.: 22.4° N
 	30	Tu	 1:02 pm	Moon Ascending Node
 	31	We	11:12 pm	New Moon
Aug	1	Th		        Venus: 3.6° W

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
     July, 2019    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Mon  1| 06:00a  09:32p  15:31 | 10:57p  04:35a |      Rise 05:49a    1%|
     |Tue  2| 06:01a  09:31p  15:30 | 10:57p  04:36a |New   Set  09:37p    0%|
     |Wed  3| 06:02a  09:31p  15:29 | 10:56p  04:36a |      Set  10:33p    2%|
     |Thu  4| 06:02a  09:31p  15:28 | 10:56p  04:37a |      Set  11:20p    7%|
     |Fri  5| 06:03a  09:31p  15:27 | 10:55p  04:38a |      Set  11:59p   14%|
     |Sat  6| 06:04a  09:30p  15:26 | 10:55p  04:39a |      Set  12:33a   23%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  7| 06:04a  09:30p  15:25 | 10:54p  04:40a |      Set  01:03a   34%|
     |Mon  8| 06:05a  09:29p  15:24 | 10:53p  04:41a |      Set  01:31a   45%|
     |Tue  9| 06:06a  09:29p  15:23 | 10:52p  04:42a |F Qtr Set  01:58a   56%|
     |Wed 10| 06:07a  09:28p  15:21 | 10:52p  04:43a |      Set  02:26a   67%|
     |Thu 11| 06:07a  09:28p  15:20 | 10:51p  04:44a |      Set  02:57a   77%|
     |Fri 12| 06:08a  09:27p  15:19 | 10:50p  04:45a |      Set  03:32a   85%|
     |Sat 13| 06:09a  09:27p  15:17 | 10:49p  04:46a |      Set  04:11a   92%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 14| 06:10a  09:26p  15:16 | 10:48p  04:48a |      Set  04:57a   96%|
     |Mon 15| 06:11a  09:25p  15:14 | 10:47p  04:49a |      Set  05:48a   99%|
     |Tue 16| 06:12a  09:25p  15:12 | 10:46p  04:50a |Full  Rise 09:30p  100%|
     |Wed 17| 06:13a  09:24p  15:11 | 10:45p  04:51a |      Rise 10:10p   99%|
     |Thu 18| 06:14a  09:23p  15:09 | 10:44p  04:53a |      Rise 10:45p   96%|
     |Fri 19| 06:15a  09:22p  15:07 | 10:42p  04:54a |      Rise 11:14p   91%|
     |Sat 20| 06:16a  09:21p  15:05 | 10:41p  04:55a |      Rise 11:40p   85%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 21| 06:17a  09:20p  15:03 | 10:40p  04:57a |      Rise 12:04a   78%|
     |Mon 22| 06:18a  09:19p  15:01 | 10:39p  04:58a |      Rise 12:27a   69%|
     |Tue 23| 06:19a  09:18p  14:59 | 10:37p  04:59a |      Rise 12:50a   60%|
     |Wed 24| 06:20a  09:17p  14:57 | 10:36p  05:01a |L Qtr Rise 01:14a   51%|
     |Thu 25| 06:21a  09:16p  14:55 | 10:34p  05:02a |      Rise 01:40a   41%|
     |Fri 26| 06:22a  09:15p  14:53 | 10:33p  05:04a |      Rise 02:11a   31%|
     |Sat 27| 06:23a  09:14p  14:51 | 10:32p  05:05a |      Rise 02:48a   21%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 28| 06:24a  09:13p  14:49 | 10:30p  05:07a |      Rise 03:34a   13%|
     |Mon 29| 06:25a  09:12p  14:47 | 10:29p  05:08a |      Rise 04:30a    6%|
     |Tue 30| 06:26a  09:11p  14:44 | 10:27p  05:09a |      Rise 05:37a    2%|
     |Wed 31| 06:27a  09:10p  14:42 | 10:25p  05:11a |New   Set  09:10p    0%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moonrise or moonset, whichever occurs between sunrise and sunset