06/01/2020 – Ephemeris – Let’s preview June’s bright skies (Long days and short nights)

This is Bob Moler with Ephemeris for Monday, June 1st. Today the Sun will be up for 15 hours and 21 minutes, setting at 9:21, and it will rise tomorrow at 5:59. The Moon, 3 days past first quarter, will set at 4:15 tomorrow morning.

Ephemeris start’s its 46th orbit of the Sun today, so let’s preview June skies. There will be a lot of sunlight in June. The daylight hours will increase a bit from 15 hours and 21 minutes today to 15 hours and 34 minutes on the 20th, the solstice, retreating back to 15 hours 31 minutes at month’s end. At this time of the year the sunset times for Ludington, Interlochen, Petoskey and Mackinaw City are very nearly the same. However the sunrise times are at their most divergent. With Ludington’s sunrise being 14 minutes later than Mackinaw City’s. The altitude of the Sun above the southern horizon at local noon will increase from about 67 and a half degrees to 68 and three-quarters on the 20th. Local noon, when the Sun is actually due south in the Interlochen area will occur at about 1:43 p.m.

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

Addendum

June Evening Star Chart

Star Chart for June 2020 (11 p.m. EDT June 15, 2020). 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 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. 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

Star Chart for June mornings 2020 (4 a.m. EDT June 15, 2020). 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.

Twilight Limits, Nautical and Astronomical

			EDT
	Morning twilight		Evening twilight		Dark night		Moon
Date	Astro.	Nautical	Nautical	Astro.	Start	End	Illum.
2020-06-01	3h42m	4h41m	22h47m	23h47m	–	–	0.82
2020-06-02	3h41m	4h41m	22h48m	23h48m	–	–	0.9
2020-06-03	3h40m	4h40m	22h49m	23h50m	–	–	0.9
2020-06-04	3h39m	4h39m	22h50m	23h51m	–	–	0.96
2020-06-05	3h37m	4h39m	22h51m	23h52m	–	–	1
2020-06-06	3h36m	4h38m	22h52m	23h54m	–	–	1
2020-06-07	3h36m	4h37m	22h53m	23h55m	–	–	0.97
2020-06-08	3h35m	4h37m	22h54m	23h56m	23h56m	–	0.92
2020-06-09	3h34m	4h37m	22h55m	23h58m	23h58m	0h28m	0.85
2020-06-10	3h33m	4h36m	22h56m	23h59m	23h59m	1h07m	0.77
2020-06-11	3h33m	4h36m	22h56m	0h00m	0h00m	1h38m	0.67
2020-06-12	3h32m	4h36m	22h57m	0h01m	0h01m	2h04m	0.58
2020-06-13	3h32m	4h35m	22h58m	0h01m	0h01m	2h27m	0.48
2020-06-14	3h31m	4h35m	22h58m	0h02m	0h02m	2h48m	0.38
2020-06-15	3h31m	4h35m	22h59m	0h03m	0h03m	3h09m	0.29
2020-06-16	3h31m	4h35m	22h59m	0h04m	0h04m	3h30m	0.21
2020-06-17	3h31m	4h35m	23h00m	0h04m	0h04m	3h31m	0.13
2020-06-18	3h31m	4h35m	23h00m	0h05m	0h05m	3h31m	0.07
2020-06-19	3h31m	4h35m	23h00m	0h05m	0h05m	3h31m	0.03
2020-06-20	3h31m	4h36m	23h01m	0h05m	0h05m	3h31m	0
2020-06-21	3h31m	4h36m	23h01m	0h05m	0h05m	3h31m	0
2020-06-22	3h31m	4h36m	23h01m	0h06m	0h06m	3h31m	0.03
2020-06-23	3h32m	4h36m	23h01m	0h06m	0h06m	3h32m	0.07
2020-06-24	3h32m	4h37m	23h01m	0h05m	0h05m	3h32m	0.15
2020-06-25	3h33m	4h37m	23h01m	0h05m	0h28m	3h33m	0.24
2020-06-26	3h34m	4h38m	23h01m	0h05m	1h00m	3h34m	0.34
2020-06-27	3h34m	4h38m	23h01m	0h05m	1h28m	3h34m	0.46
2020-06-28	3h35m	4h39m	23h01m	0h04m	1h54m	3h35m	0.58
2020-06-29	3h36m	4h40m	23h00m	0h04m	2h19m	3h36m	0.69
2020-06-30	3h37m	4h40m	23h00m	0h03m	2h46m	3h37m	0.69

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
Jun 1  Mo            Venus: 3.7° E
    2  Tu  11:36 pm  Moon Perigee: 364400 km
    3  We  01:42 pm  Venus Inferior Solar Conjunction
    4  Th  08:59 am  Mercury Greatest Elongation: 23.6° E
    5  Fr  03:12 pm  Full Moon
    5  Fr  03:25 pm  Penumbral Lunar Eclipse
	                 (Europe, Africa, Asia, Aus.)
    6  Sa  02:10 pm  Moon Descending Node
    7  Su  12:22 pm  Moon South Dec.: 24.1° S
    8  Mo  01:19 pm  Moon-Jupiter: 2.3° N
    8  Mo  10:19 pm  Moon-Saturn: 2.8° N
   12  Fr  07:53 pm  Moon-Mars: 3° N
   13  Sa  02:24 am  Last Quarter
   14  Su  08:56 pm  Moon Apogee: 404600 km
   19  Fr  04:52 am  Moon-Venus: 0.8° S
   20  Sa  05:43 pm  Summer Solstice
   21  Su  12:24 am  Moon Ascending Node
   21  Su  02:40 am  Annular Solar Eclipse
                         (Africa, Asia)
   21  Su  02:41 am  New Moon
   21  Su  11:56 pm  Moon North Dec.: 24.1° N
   23  Tu  08:33 pm  Moon-Beehive: 1.8° S
   28  Su  04:16 am  First Quarter
   29  Mo  10:09 pm  Moon Perigee: 369000 km
   30  Tu  10:45 pm  Mercury Inferior Solar Conjunction

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

                Ephemeris of Sky Events for Interlochen/TC
June, 2020    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  09:21p  15:21 | 10:45p  04:36a |      Set  04:15a   81%|
|Tue  2| 05:59a  09:22p  15:23 | 10:46p  04:36a |      Set  04:44a   89%|
|Wed  3| 05:59a  09:23p  15:24 | 10:47p  04:35a |      Set  05:15a   95%|
|Thu  4| 05:58a  09:24p  15:25 | 10:48p  04:34a |      Set  05:53a   99%|
|Fri  5| 05:58a  09:24p  15:26 | 10:49p  04:34a |Full  Rise 09:32p  100%|
|Sat  6| 05:57a  09:25p  15:27 | 10:50p  04:33a |      Rise 10:41p   98%|
+------+-----------------------+----------------+-----------------------+
|Sun  7| 05:57a  09:26p  15:28 | 10:51p  04:32a |      Rise 11:39p   94%|
|Mon  8| 05:57a  09:26p  15:29 | 10:52p  04:32a |      Rise 12:28a   88%|
|Tue  9| 05:57a  09:27p  15:30 | 10:52p  04:32a |      Rise 01:06a   80%|
|Wed 10| 05:56a  09:28p  15:31 | 10:53p  04:31a |      Rise 01:38a   71%|
|Thu 11| 05:56a  09:28p  15:31 | 10:54p  04:31a |      Rise 02:04a   62%|
|Fri 12| 05:56a  09:29p  15:32 | 10:54p  04:31a |      Rise 02:27a   53%|
|Sat 13| 05:56a  09:29p  15:32 | 10:55p  04:30a |L Qtr Rise 02:48a   43%|
+------+-----------------------+----------------+-----------------------+
|Sun 14| 05:56a  09:30p  15:33 | 10:56p  04:30a |      Rise 03:09a   34%|
|Mon 15| 05:56a  09:30p  15:33 | 10:56p  04:30a |      Rise 03:30a   25%|
|Tue 16| 05:56a  09:30p  15:34 | 10:57p  04:30a |      Rise 03:52a   17%|
|Wed 17| 05:56a  09:31p  15:34 | 10:57p  04:30a |      Rise 04:18a   11%|
|Thu 18| 05:56a  09:31p  15:34 | 10:57p  04:30a |      Rise 04:48a    5%|
|Fri 19| 05:56a  09:31p  15:34 | 10:58p  04:30a |      Rise 05:25a    2%|
|Sat 20| 05:57a  09:31p  15:34 | 10:58p  04:30a |      Rise 06:09a    0%|
+------+-----------------------+----------------+-----------------------+
|Sun 21| 05:57a  09:32p  15:34 | 10:58p  04:30a |New   Set  10:12p    1%|
|Mon 22| 05:57a  09:32p  15:34 | 10:58p  04:31a |      Set  11:04p    3%|
|Tue 23| 05:57a  09:32p  15:34 | 10:58p  04:31a |      Set  11:49p    8%|
|Wed 24| 05:58a  09:32p  15:34 | 10:58p  04:31a |      Set  12:27a   16%|
|Thu 25| 05:58a  09:32p  15:33 | 10:58p  04:32a |      Set  12:59a   24%|
|Fri 26| 05:58a  09:32p  15:33 | 10:58p  04:32a |      Set  01:28a   35%|
|Sat 27| 05:59a  09:32p  15:33 | 10:58p  04:33a |      Set  01:54a   46%|
+------+-----------------------+----------------+-----------------------+
|Sun 28| 05:59a  09:32p  15:32 | 10:58p  04:33a |F Qtr Set  02:19a   58%|
|Mon 29| 06:00a  09:32p  15:31 | 10:57p  04:34a |      Set  02:46a   69%|
|Tue 30| 06:00a  09:32p  15:31 | 10:57p  04:35a |      Set  03:15a   79%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunrise and sunset