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11/30/2018 – Ephemeris – Previewing December skies

November 30, 2018 Comments off

Bob Moler with Ephemeris for Friday, November 30th. The Sun will rise at 7:58. It’ll be up for 9 hours and 5 minutes, setting at 5:04. The Moon, 1 day past last quarter, will rise at 1:29 tomorrow morning.

Let’s preview December’s skies. Winter will officially arrive on the 21st at 5:22 p.m., the winter solstice. The noontime sun will dip from 23 ½ degrees to a bit less than 22 degrees above the southern horizon on that day. There will be little movement in the sunset times: In the Traverse City/Interlochen area this will be from 5:03 tomorrow, down to 5:02 and then advancing to 5:11 at the end of the month. The sunrise times will advance from 7:58 tomorrow to 8:20 on the 31st. The big event in December will be the Geminid meteor shower whose maximum is on the morning of the 14th. An old comet will make a close pass of the Earth and may be quite bright by mid-month. Watch for Comet Wirtanen.

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

Addenda

December Evening Star Chart

Star Chart for December 2018 (9 p.m. EST December 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). 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 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.

December Morning Star Chart

Star Chart for December mornings 2018 (6 a.m. EST December 15, 2018). Created using my LookingUp program. Click on image to enlarge. The original morning chart uploaded December 1st was outdated.

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.
  • GemR on the evening and morning star charts is the radiant of the Geminid meteor shower which peaks on the morning of the 14th,

Twilight

      Time zone=EDT      
  Morning twilight Evening twilight Dark night Moon
Date Astronomical Nautical Nautical Astronomical Start End Illum.
2018-12-01 6h20m 6h55m 18h16m 18h51m 18h51m 1h29m 0.33
2018-12-02 6h21m 6h56m 18h15m 18h50m 18h50m 2h39m 0.23
2018-12-03 6h22m 6h57m 18h15m 18h50m 18h50m 3h48m 0.14
2018-12-04 6h23m 6h58m 18h15m 18h50m 18h50m 4h56m 0.07
2018-12-05 6h24m 6h59m 18h15m 18h50m 18h50m 6h03m 0.03
2018-12-06 6h25m 7h00m 18h15m 18h50m 18h50m 6h25m 0.00
2018-12-07 6h26m 7h01m 18h15m 18h50m 18h50m 6h26m 0.00
2018-12-08 6h26m 7h02m 18h15m 18h50m 18h50m 6h26m 0.02
2018-12-09 6h27m 7h03m 18h15m 18h50m 19h15m 6h27m 0.06
2018-12-10 6h28m 7h04m 18h15m 18h50m 20h09m 6h28m 0.12
2018-12-11 6h29m 7h04m 18h15m 18h50m 21h06m 6h29m 0.19
2018-12-12 6h30m 7h05m 18h15m 18h51m 22h05m 6h30m 0.27
2018-12-13 6h30m 7h06m 18h15m 18h51m 23h05m 6h30m 0.36
2018-12-14 6h31m 7h07m 18h16m 18h51m 6h31m 0.45
2018-12-15 6h32m 7h07m 18h16m 18h51m 0h06m 6h32m 0.55
2018-12-16 6h32m 7h08m 18h16m 18h52m 1h07m 6h32m 0.65
2018-12-17 6h33m 7h09m 18h16m 18h52m 2h11m 6h33m 0.75
2018-12-18 6h30m 7h05m 18h13m 18h48m 3h16m 6h30m 0.84
2018-12-19 6h30m 7h06m 18h13m 18h49m 4h24m 6h30m 0.91
2018-12-20 6h31m 7h06m 18h14m 18h49m 5h34m 6h31m 0.97
2018-12-21 6h31m 7h07m 18h14m 18h50m 0.97
2018-12-22 6h32m 7h07m 18h15m 18h50m 1.00
2018-12-23 6h32m 7h08m 18h15m 18h51m 1.00
2018-12-24 6h33m 7h08m 18h16m 18h51m 18h51m 19h35m 0.97
2018-12-25 6h33m 7h09m 18h16m 18h52m 18h52m 20h49m 0.91
2018-12-26 6h34m 7h09m 18h17m 18h53m 18h53m 22h05m 0.82
2018-12-27 6h34m 7h09m 18h18m 18h53m 18h53m 23h19m 0.72
2018-12-28 6h34m 7h10m 18h18m 18h54m 18h54m 0.61
2018-12-29 6h34m 7h10m 18h19m 18h55m 18h55m 0h30m 0.49
2018-12-30 6h35m 7h10m 18h20m 18h55m 18h55m 1h40m 0.38
2018-12-31 6h35m 7h10m 18h21m 18h56m 18h56m 2h48m 0.28

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 Local Event
      Time  
Dec 1 Sa   Venus: 39.9° W
  3 Mo 01:42:00 PM Moon-Venus: 3.8° S
  7 Fr 02:20:00 AM New Moon
  9 Su 12:30:00 AM Moon-Saturn: 1.2° S
  9 Su 06:12:00 AM Moon South Dec.: 21.5° S
  10 Mo 12:57:00 PM Moon Descending Node
  12 We 07:25:00 AM Moon Apogee: 405200 km
  14 Fr 07:16:00 AM Geminid Shower: ZHR = 120
  14 Fr 06:21:00 PM Moon-Mars: 3.9° N
  15 Sa 05:59:00 AM Mercury Elongation: 21.3° W
  15 Sa 06:49:00 AM First Quarter
  21 Fr 02:31:00 AM Moon-Aldebaran: 1.7° S
  21 Fr 02:49:00 PM Mercury-Jupiter: 0.8° N
  21 Fr 05:22:00 PM Winter Solstice
  22 Sa 03:03:00 AM Mercury-Antares: 6° N
  22 Sa 10:08:00 AM Jupiter-Antares: 5.2° N
  22 Sa 12:49:00 PM Full Moon
  22 Sa 04:00:00 PM Ursid Shower: ZHR = 10
  23 Su 06:48:00 AM Moon North Dec.: 21.6° N
  24 Mo 04:52:00 AM Moon Perigee: 361100 km
  24 Mo 06:54:00 AM Moon Ascending Node
  24 Mo 11:52:00 PM Moon-Beehive: 0.6° N
  26 We 11:06:00 AM Moon-Regulus: 2.5° S
  29 Sa 04:34:00 AM Last Quarter
         
         

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

Ephemeris of Sky Events for NMC Observatory
December, 2018 – Local time zone: EST
Date Sun   Twilight* Moon Illum
    Rise Set Hours End Start Phase R/S** Time Fractn
Sat 1 07:59a 05:03p 09:04 06:12p 06:49a   Rise 02:38a 29.00%
                     
Sun 2 08:00a 05:03p 09:03 06:12p 06:50a   Rise 03:47a 19.00%
Mon 3 08:01a 05:03p 09:01 06:12p 06:51a   Rise 04:55a 12.00%
Tue 4 08:02a 05:02p 09:00 06:12p 06:52a   Rise 06:02a 6.00%
Wed 5 08:03a 05:02p 08:59 06:12p 06:53a   Rise 07:07a 2.00%
Thu 6 08:04a 05:02p 08:57 06:12p 06:54a   Rise 08:10a 0.00%
Fri 7 08:05a 05:02p 08:56 06:12p 06:55a New Set 05:40p 1.00%
Sat 8 08:06a 05:02p 08:55 06:12p 06:56a   Set 06:25p 3.00%
                     
Sun 9 08:07a 05:02p 08:54 06:12p 06:57a   Set 07:15p 7.00%
Mon 10 08:08a 05:02p 08:53 06:12p 06:58a   Set 08:09p 12.00%
Tue 11 08:09a 05:02p 08:52 06:12p 06:59a   Set 09:06p 19.00%
Wed 12 08:10a 05:02p 08:52 06:12p 06:59a   Set 10:05p 27.00%
Thu 13 08:10a 05:02p 08:51 06:12p 07:00a   Set 11:05p 36.00%
Fri 14 08:11a 05:02p 08:50 06:13p 07:01a   Set 12:05a 45.00%
Sat 15 08:12a 05:02p 08:50 06:13p 07:02a F Qtr Set 01:07a 55.00%
                     
Sun 16 08:13a 05:03p 08:49 06:13p 07:02a   Set 02:10a 65.00%
Mon 17 08:13a 05:03p 08:49 06:13p 07:03a   Set 03:15a 74.00%
Tue 18 08:14a 05:03p 08:49 06:14p 07:03a   Set 04:23a 83.00%
Wed 19 08:15a 05:04p 08:49 06:14p 07:04a   Set 05:33a 90.00%
Thu 20 08:15a 05:04p 08:48 06:15p 07:05a   Set 06:45a 96.00%
Fri 21 08:16a 05:05p 08:48 06:15p 07:05a   Set 07:56a 99.00%
Sat 22 08:16a 05:05p 08:48 06:16p 07:06a Full Rise 05:22p 100.00%
                     
Sun 23 08:17a 05:06p 08:49 06:16p 07:06a   Rise 06:25p 98.00%
Mon 24 08:17a 05:06p 08:49 06:17p 07:07a   Rise 07:35p 93.00%
Tue 25 08:17a 05:07p 08:49 06:17p 07:07a   Rise 08:49p 85.00%
Wed 26 08:18a 05:08p 08:49 06:18p 07:07a   Rise 10:05p 76.00%
Thu 27 08:18a 05:08p 08:50 06:19p 07:08a   Rise 11:18p 66.00%
Fri 28 08:18a 05:09p 08:50 06:19p 07:08a   Rise 12:30a 54.00%
Sat 29 08:19a 05:10p 08:51 06:20p 07:08a L Qtr Rise 01:39a 43.00%
                     
Sun 30 08:19a 05:11p 08:51 06:21p 07:08a   Rise 02:47a 33.00%
Mon 31 08:19a 05:12p 08:52 06:22p 07:09a   Rise 03:53a 24.00%

* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

 

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11/01/2018 – Ephemeris – November preview

November 1, 2018 Comments off

Ephemeris for Thursday, November 1st. The Sun will rise at 8:20. It’ll be up for 10 hours and 10 minutes, setting at 6:31. The Moon, 1 day past last quarter, will rise at 2:14 tomorrow morning.

Let’s look ahead at the skies for the month of November. The Sun is still moving south rapidly. Daylight hours in the Interlochen/Traverse City area and will drop from 10 hours and 10 minutes today to 9 hours 5 minutes on the 30th. The altitude, or angle, of the Sun above the southern horizon at local noon will be at 30 degrees today 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, will be about 12:30 p.m. once we’re on standard time. The Leonid meteor shower will reach multiple peaks from the 16th through the 21st and is expected to be lackluster and may only produce 10 to 15 meteors per hour. But the Leonids can be surprising.

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

Addendum

November Evening Star Chart

November evening star chart
Star Chart for November 2018 (9 p.m. EST November 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). 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 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.

November Morning Star Chart

November Morning star chart

Star Chart for November moprnings 2018 (6 a.m. EST November 15, 2018). Created using my LookingUp program. Click on image to enlarge.  The original morning chart uploaded November 1st was outdated.  This corrected chart was uploaded November 6th.

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 16th to 21st.

Twilight

Time zone=EDT
Morning twilight Evening twilight Dark night Moon
Date Astronomical Nautical Nautical Astronomical Start End Illum.
2018-11-01 6h47m 7h21m 19h39m 20h13m 20h13m 1h02m 0.41
2018-11-02 6h48m 7h22m 19h38m 20h12m 20h12m 2h14m 0.29
2018-11-03 6h49m 7h23m 19h37m 20h11m 20h11m 3h27m 0.19
2018-11-04 5h50m 6h24m 18h36m 19h10m 19h10m 3h39m 0.11
2018-11-05 5h52m 6h26m 18h34m 19h08m 19h08m 4h50m 0.05
2018-11-06 5h53m 6h27m 18h33m 19h07m 19h07m 5h53m 0.01
2018-11-07 5h54m 6h28m 18h32m 19h06m 19h06m 5h54m 0.00
2018-11-08 5h55m 6h29m 18h31m 19h05m 19h05m 5h55m 0.01
2018-11-09 5h56m 6h30m 18h30m 19h04m 19h04m 5h56m 0.05
2018-11-10 5h57m 6h32m 18h29m 19h03m 19h46m 5h57m 0.10
2018-11-11 5h59m 6h33m 18h28m 19h02m 20h33m 5h59m 0.17
2018-11-12 6h00m 6h34m 18h27m 19h01m 21h25m 6h00m 0.26
2018-11-13 6h01m 6h35m 18h26m 19h00m 22h20m 6h01m 0.35
2018-11-14 6h02m 6h36m 18h25m 19h00m 23h18m 6h02m 0.44
2018-11-15 6h03m 6h38m 18h24m 18h59m 6h03m 0.54
2018-11-16 6h04m 6h39m 18h24m 18h58m 0h18m 6h04m 0.63
2018-11-17 6h05m 6h40m 18h23m 18h57m 1h19m 6h05m 0.73
2018-11-18 6h07m 6h41m 18h22m 18h57m 2h21m 6h07m 0.81
2018-11-19 6h08m 6h42m 18h21m 18h56m 3h24m 6h08m 0.89
2018-11-20 6h09m 6h43m 18h21m 18h55m 4h30m 6h09m 0.95
2018-11-21 6h10m 6h45m 18h20m 18h55m 5h38m 6h10m 0.99
2018-11-22 6h11m 6h46m 18h19m 18h54m 0.99
2018-11-23 6h12m 6h47m 18h19m 18h54m 1.00
2018-11-24 6h13m 6h48m 18h18m 18h53m 0.99
2018-11-25 6h14m 6h49m 18h18m 18h53m 18h53m 19h38m 0.94
2018-11-26 6h15m 6h50m 18h17m 18h52m 18h52m 20h43m 0.88
2018-11-27 6h16m 6h51m 18h17m 18h52m 18h52m 21h52m 0.79
2018-11-28 6h17m 6h52m 18h16m 18h51m 18h51m 23h05m 0.68
2018-11-29 6h18m 6h53m 18h16m 18h51m 18h51m 0.56
2018-11-30 6h19m 6h54m 18h16m 18h51m 18h51m 0h17m 0.44
2018-10-31 6h45m 7h19m 19h40m 20h14m 20h14m 0.53

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

      Time  
Nov 1 Th Venus: 10.6° W
1 Th 11:16:00 PM Moon-Regulus: 2.1° S
5 Mo 12:31:00 PM South Taurid Shower: ZHR = 10
6 Tu 09:59:00 AM Mercury Elongation: 23.3° E
7 We 11:02:00 AM New Moon
8 Th 11:56:00 PM Mercury-Antares: 1.8° N
11 Su 10:46:00 AM Moon-Saturn: 1.6° S
11 Su 09:21:00 PM Moon South Dec.: 21.4° S
12 Mo 11:48:00 AM North Taurid Shower: ZHR = 15
13 Tu 09:04:00 AM Moon Descending Node
14 We 10:57:00 AM Moon Apogee: 404300 km
14 We 06:23:00 PM Venus-Spica: 1.5° S
15 Th 09:54:00 AM First Quarter
15 Th 11:16:00 PM Moon-Mars: 1.1° N
17 Sa 06:05:00 PM Leonid Shower: ZHR = 15
23 Fr 12:39:00 AM Full Moon
23 Fr 04:11:00 PM Moon-Aldebaran: 1.7° S
25 Su 08:48:00 PM Moon North Dec.: 21.5° N
26 Mo 01:25:00 AM Jupiter Conjunction
26 Mo 07:10:00 AM Moon Perigee: 366600 km
27 Tu 12:18:00 AM Moon Ascending Node
27 Tu 04:10:00 AM Mercury Inferior Conj.
27 Tu 03:57:00 PM Moon-Beehive: 0.8° N
29 Th 04:27:00 AM Moon-Regulus: 2.4° S
29 Th 07:19:00 PM Last Quarter
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

Ephemeris of Sky Events for Interlochen/TC
November 2018 – Local time zone: EDT/EST
Date Sun Twilight* Moon Illum
Rise Set Hours End Start Phase R/S** Time Fract
Thu 1 08:20a 06:31p 10:11 07:36p 07:15a Rise 02:14a 35
Fri 2 08:21a 06:29p 10:08 07:34p 07:16a Rise 03:27a 25
Sat 3 08:22a 06:28p 10:05 07:33p 07:17a Rise 04:39a 16
*** Time Change – EST – Time Change ***
Sun 4 07:24a 05:27p 10:02 06:32p 06:19a Rise 04:50a 9
Mon 5 07:25a 05:25p 10:00 06:31p 06:20a Rise 06:00a 3
Tue 6 07:27a 05:24p 09:57 06:30p 06:21a Rise 07:09a 1
Wed 7 07:28a 05:23p 09:55 06:29p 06:22a New Set 05:52p 0
Thu 8 07:29a 05:22p 09:52 06:28p 06:23a Set 06:26p 2
Fri 9 07:31a 05:21p 09:49 06:26p 06:25a Set 07:03p 6
Sat 10 07:32a 05:19p 09:47 06:25p 06:26a Set 07:46p 11
Sun 11 07:33a 05:18p 09:44 06:25p 06:27a Set 08:33p 18
Mon 12 07:35a 05:17p 09:42 06:24p 06:28a Set 09:25p 26
Tue 13 07:36a 05:16p 09:40 06:23p 06:29a Set 10:20p 35
Wed 14 07:37a 05:15p 09:37 06:22p 06:31a Set 11:18p 44
Thu 15 07:39a 05:14p 09:35 06:21p 06:32a F Qtr Set 12:18a 54
Fri 16 07:40a 05:13p 09:33 06:20p 06:33a Set 01:18a 63
Sat 17 07:41a 05:12p 09:30 06:19p 06:34a Set 02:20a 72
Sun 18 07:43a 05:11p 09:28 06:19p 06:35a Set 03:24a 80
Mon 19 07:44a 05:10p 09:26 06:18p 06:36a Set 04:29a 88
Tue 20 07:45a 05:10p 09:24 06:17p 06:38a Set 05:37a 94
Wed 21 07:47a 05:09p 09:22 06:17p 06:39a Set 06:47a 98
Thu 22 07:48a 05:08p 09:20 06:16p 06:40a Set 07:58a 100
Fri 23 07:49a 05:07p 09:18 06:15p 06:41a Full Rise 05:55p 99
Sat 24 07:50a 05:07p 09:16 06:15p 06:42a Rise 06:42p 96
Sun 25 07:52a 05:06p 09:14 06:14p 06:43a Rise 07:39p 90
Mon 26 07:53a 05:06p 09:12 06:14p 06:44a Rise 08:43p 82
Tue 27 07:54a 05:05p 09:10 06:14p 06:45a Rise 09:52p 72
Wed 28 07:55a 05:04p 09:09 06:13p 06:46a Rise 11:05p 61
Thu 29 07:56a 05:04p 09:07 06:13p 06:47a L Qtr Rise 12:17a 50
Fri 30 07:58a 05:04p 09:06 06:13p 06:48a Rise 01:28a 39
* Nautical Twilight
** Rise or set whichever occurs between sunset and sunrise

10/01/2018 – Ephemeris – Previewing October skies

October 1, 2018 Comments off

Ephemeris for Monday, October 1st. The Sun will rise at 7:40. It’ll be up for 11 hours and 42 minutes, setting at 7:23. The Moon, 1 day before last quarter, will rise at 11:55 this evening.

Let’s look at the skies for the month of October. The Sun will still be moving south rapidly. Daylight hours in the Interlochen/Traverse City area and will drop from 11 hours and 42 minutes today to 10 hours, 13 minutes at months end. The altitude of the sun above the southern horizon at local noon will be 42 degrees today in the Interlochen area and will descend to 31 degrees on Halloween. Venus will pass the Sun, moving from the evening sky to the morning sky on the 26th. Venus has not been too noticeable in the evening for the last month, but in early November it will seem to suddenly appear in the morning sky. It can be mistaken as a UFO, especially with its tiny Cheshire Cat crescent smile in binoculars or a small telescope.

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

Addendum

October Evening Star Chart

October evening star chart

Star Chart for October 2018 (10 p.m. EDT October 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). 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 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.

October Morning Star Chart

October Morning Star Chart

Star Chart for October 2018 mornings based on 6 a.m. October 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.
  • Follow the arc of the handle of the Big Dipper to the star Arcturus
  • The Summer Triangle is in red.
  • DracR on the evening star chart is the radiant for the Draconid meteor shwer which peaks on the 10th.
  • OriR on the morning star chart is the radiant of the Orionid meteor shower which peaks on the 21st.

Twilight

      Time zone=EDT      
  Morning twilight Evening twilight Dark night Moon
Date Astronomical Nautical Nautical Astronomical Start End Illum.
2018-10-01 6h08m 6h42m 20h29m 21h03m 21h03m 23h56m 0.61
2018-10-02 6h09m 6h44m 20h27m 21h01m 21h01m 0.49
2018-10-03 6h11m 6h45m 20h25m 20h59m 20h59m 0h55m 0.37
2018-10-04 6h12m 6h46m 20h23m 20h57m 20h57m 2h02m 0.26
2018-10-05 6h13m 6h47m 20h22m 20h56m 20h56m 3h14m 0.16
2018-10-06 6h15m 6h49m 20h20m 20h54m 20h54m 4h28m 0.08
2018-10-07 6h16m 6h50m 20h18m 20h52m 20h52m 5h43m 0.03
2018-10-08 6h17m 6h51m 20h16m 20h50m 20h50m 6h17m 0
2018-10-09 6h18m 6h52m 20h14m 20h48m 20h48m 6h18m 0
2018-10-10 6h20m 6h53m 20h13m 20h46m 20h46m 6h20m 0.03
2018-10-11 6h21m 6h55m 20h11m 20h45m 20h56m 6h21m 0.08
2018-10-12 6h22m 6h56m 20h09m 20h43m 21h31m 6h22m 0.15
2018-10-13 6h23m 6h57m 20h07m 20h41m 22h11m 6h23m 0.24
2018-10-14 6h25m 6h58m 20h06m 20h39m 22h55m 6h25m 0.33
2018-10-15 6h26m 7h00m 20h04m 20h38m 23h44m 6h26m 0.43
2018-10-16 6h27m 7h01m 20h02m 20h36m 6h27m 0.52
2018-10-17 6h28m 7h02m 20h01m 20h35m 0h37m 6h28m 0.62
2018-10-18 6h30m 7h03m 19h59m 20h33m 1h33m 6h30m 0.71
2018-10-19 6h31m 7h04m 19h58m 20h31m 2h32m 6h31m 0.8
2018-10-20 6h32m 7h06m 19h56m 20h30m 3h32m 6h32m 0.87
2018-10-21 6h33m 7h07m 19h55m 20h28m 4h34m 6h33m 0.93
2018-10-22 6h34m 7h08m 19h53m 20h27m 5h37m 6h34m 0.93
2018-10-23 6h36m 7h09m 19h52m 20h25m 0.97
2018-10-24 6h37m 7h10m 19h50m 20h24m 1
2018-10-25 6h38m 7h12m 19h49m 20h22m 1
2018-10-26 6h39m 7h13m 19h47m 20h21m 0.97
2018-10-27 6h40m 7h14m 19h46m 20h19m 20h19m 21h01m 0.92
2018-10-28 6h42m 7h15m 19h44m 20h18m 20h18m 21h51m 0.85
2018-10-29 6h43m 7h17m 19h43m 20h17m 20h17m 22h48m 0.75
2018-10-30 6h44m 7h18m 19h42m 20h15m 20h15m 23h53m 0.64
2018-10-31 6h45m 7h19m 19h40m 20h14m 20h14m 0.53

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

Oct 01  Mo          Venus: 32.9° E
02 Tu 5:45 am Last Quarter
02 Tu 9:03 am Moon North Dec.: 21° N
03 We 11:10 pm Moon Ascending Node
04 Th 5:51 am Moon-Beehive: 1.3° N
05 Fr 5:58 pm Moon-Regulus: 1.9° S
05 Fr 6:29 pm Moon Perigee: 366400 km
08 Mo 11:47 pm New Moon
10 We 8:10 pm Draconid Shower: ZHR = 10
11 Th 5:21 pm Moon-Jupiter: 4.3° S
14 Su 11:01 pm Moon-Saturn: 2° S
15 Mo 1:26 pm Moon South Dec.: 21.2° S
15 Mo 10:32 pm Mercury-Venus: 6.2° N
16 Tu 2:02 pm First Quarter
17 We 8:03 am Moon Descending Node
17 We 3:16 pm Moon Apogee: 404200 km
18 Th 9:01 am Moon-Mars: 2.2° S
21 Su 1:03 pm Orionid Shower: ZHR = 20
23 Tu 8:43 pm Uranus Opposition
24 We 12:45 pm Full Moon
26 Fr 10:13 am Venus Inferior Conjunction with the Sun
27 Sa 9:04 am Moon-Aldebaran: 1.6° S
29 Mo 1:28 am Mercury-Jupiter: 3.1° N
29 Mo 1:34 am Moon North Dec.: 21.3° N
30 Tu 10:46 pm Moon Ascending Node
31 We 10:24 am Moon-Beehive: 1° N
31 We 11:40 am Last Quarter
31 We 3:05 pm Moon Perigee: 370200 km
Nov 01 Th Venus: 10.6° W

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 NMC Observatory
October, 2018 – Local time zone: EDT
Date Sun Twilight* Moon Illum
    Rise Set Hours End Start Phase R/S** Time Fractn
Mon 1 07:40a 07:22p 11:42 08:25p 06:37a   Rise 11:55p 55%
Tue 2 07:41a 07:21p 11:39 08:23p 06:38a L Qtr Rise 12:55a 43%
Wed 3 07:42a 07:19p 11:36 08:22p 06:39a   Rise 02:02a 32%
Thu 4 07:44a 07:17p 11:33 08:20p 06:41a   Rise 03:14a 22%
Fri 5 07:45a 07:15p 11:30 08:18p 06:42a   Rise 04:28a 13%
Sat 6 07:46a 07:13p 11:27 08:16p 06:43a   Rise 05:42a 6%
 
Sun 7 07:47a 07:12p 11:24 08:14p 06:44a   Rise 06:56a 2%
Mon 8 07:48a 07:10p 11:21 08:13p 06:46a New Set 07:24p 0%
Tue 9 07:50a 07:08p 11:18 08:11p 06:47a   Set 07:53p 1%
Wed 10 07:51a 07:06p 11:15 08:09p 06:48a   Set 08:23p 4%
Thu 11 07:52a 07:04p 11:12 08:07p 06:49a   Set 08:56p 10%
Fri 12 07:54a 07:03p 11:09 08:06p 06:50a   Set 09:31p 17%
Sat 13 07:55a 07:01p 11:06 08:04p 06:52a   Set 10:11p 25%
 
Sun 14 07:56a 06:59p 11:03 08:02p 06:53a   Set 10:55p 34%
Mon 15 07:57a 06:57p 11:00 08:01p 06:54a   Set 11:43p 43%
Tue 16 07:59a 06:56p 10:57 07:59p 06:55a F Qtr Set 12:36a 52%
Wed 17 08:00a 06:54p 10:54 07:57p 06:57a   Set 01:33a 62%
Thu 18 08:01a 06:52p 10:51 07:56p 06:58a   Set 02:31a 71%
Fri 19 08:02a 06:51p 10:48 07:54p 06:59a   Set 03:32a 79%
Sat 20 08:04a 06:49p 10:45 07:53p 07:00a   Set 04:34a 86%
 
Sun 21 08:05a 06:47p 10:42 07:51p 07:01a   Set 05:37a 92%
Mon 22 08:06a 06:46p 10:39 07:49p 07:03a   Set 06:41a 97%
Tue 23 08:08a 06:44p 10:36 07:48p 07:04a   Set 07:48a 99%
Wed 24 08:09a 06:43p 10:33 07:46p 07:05a Full Rise 07:13p 100%
Thu 25 08:10a 06:41p 10:30 07:45p 07:06a   Rise 07:44p 98%
Fri 26 08:12a 06:40p 10:27 07:44p 07:08a   Rise 08:19p 94%
Sat 27 08:13a 06:38p 10:25 07:42p 07:09a   Rise 09:01p 87%
 
Sun 28 08:14a 06:37p 10:22 07:41p 07:10a   Rise 09:51p 79%
Mon 29 08:16a 06:35p 10:19 07:40p 07:11a   Rise 10:48p 69%
Tue 30 08:17a 06:34p 10:16 07:38p 07:12a   Rise 11:53p 58%
Wed 31 08:18a 06:32p 10:13 07:37p 07:14a L Qtr Rise 01:02a 47%
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

07/31/2018 – Ephemeris – Previewing August skies

July 31, 2018 Comments off

Ephemeris for Tuesday, July 31st. The Sun rises at 6:27. It’ll be up for 14 hours and 41 minutes, setting at 9:09. The Moon, half way from full to last quarter, will rise at 11:17 this evening.

Let’s look ahead at the month of August in the skies. Daylight hours will decrease from 14 hours and 39 minutes tomorrow to 13 hours 17 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 tomorrow to just over 53 degrees on the 31st. Straits area listeners can subtract one more degree from those angles. Local noon, when the Sun is due south, is about 1:43 p.m. The Perseid meteor shower will reach its peak all night on the 12th. It will be a dark night with the one day old moon setting at 10 p.m. The radiant point, where the meteors will seem to come from, will be rising higher in the northeastern sky all night. On the 17th Venus will reach ts greatest separation from the Sun in the evening sky.

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

Addendum

August Evening Star Chart

August evening star chart

Star Chart for August 2018 (10 p.m. EDT August 15, 2018). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 10 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 10 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.

August Morning Star Chart

August Morning Star Chart

Star Chart for August 2018 mornings based on 4:30 a.m. August 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 and
  • Continue with a spike to Spica.
  • The Summer Triangle is in red.
  • PerR – Perseid meteor shower radiant

Twilight

Morning Twilight Evening Twilight Dark Night Moon
Date Astronomical Nautical Nautical Astronomical Start End Illum.
2018-07-31 4h28m 5h17m 22h28m 23h17m 23h17m 23h17m 0.89
2018-08-01 4h30m 5h18m 22h27m 23h15m 23h15m 23h43m 0.82
2018-08-02 4h32m 5h20m 22h25m 23h13m 23h13m 0.74
2018-08-03 4h34m 5h21m 22h24m 23h11m 23h11m 0h09m 0.64
2018-08-04 4h36m 5h23m 22h22m 23h09m 23h09m 0h37m 0.53
2018-08-05 4h38m 5h24m 22h20m 23h07m 23h07m 1h08m 0.42
2018-08-06 4h40m 5h26m 22h18m 23h05m 23h05m 1h44m 0.31
2018-08-07 4h42m 5h27m 22h17m 23h03m 23h03m 2h26m 0.20
2018-08-08 4h43m 5h29m 22h15m 23h00m 23h00m 3h18m 0.11
2018-08-09 4h45m 5h30m 22h13m 22h58m 22h58m 4h19m 0.05
2018-08-10 4h47m 5h32m 22h11m 22h56m 22h56m 4h47m 0.01
2018-08-11 4h49m 5h33m 22h10m 22h54m 22h54m 4h49m 0.00
2018-08-12 4h51m 5h35m 22h08m 22h52m 22h52m 4h51m 0.03
2018-08-13 4h53m 5h36m 22h06m 22h49m 22h49m 4h53m 0.08
2018-08-14 4h55m 5h38m 22h04m 22h47m 23h01m 4h55m 0.16
2018-08-15 4h56m 5h39m 22h02m 22h45m 23h29m 4h56m 0.26
2018-08-16 4h58m 5h41m 22h00m 22h43m 23h59m 4h58m 0.36
2018-08-17 5h00m 5h42m 21h58m 22h41m 5h00m 0.47
2018-08-18 5h02m 5h44m 21h56m 22h38m 0h30m 5h02m 0.57
2018-08-19 5h04m 5h45m 21h54m 22h36m 1h03m 5h04m 0.67
2018-08-20 5h05m 5h47m 21h53m 22h34m 1h40m 5h05m 0.76
2018-08-21 5h07m 5h48m 21h51m 22h32m 2h22m 5h07m 0.84
2018-08-22 5h09m 5h50m 21h49m 22h29m 3h09m 5h09m 0.90
2018-08-23 5h11m 5h51m 21h47m 22h27m 4h00m 5h11m 0.90
2018-08-24 5h12m 5h53m 21h45m 22h25m 4h56m 5h12m 0.95
2018-08-25 5h14m 5h54m 21h43m 22h23m 0.99
2018-08-26 5h16m 5h55m 21h41m 22h20m 1.00
2018-08-27 5h17m 5h57m 21h39m 22h18m 0.99
2018-08-28 5h19m 5h58m 21h37m 22h16m 0.97
2018-08-29 5h21m 6h00m 21h35m 22h14m 0.92
2018-08-30 5h22m 6h01m 21h33m 22h11m 22h11m 22h40m 0.86
2018-08-31 5h24m 6h02m 21h31m 22h09m 22h09m 23h09m 0.78

Twilight calendar was generated in Cartes du Ciel.

NASA Calendar of Planetary Events

Date        Time    Event
Aug 01  We          Venus: 45.1° E
    04  Sa  2:18 pm Last Quarter
    06  Mo  2:35 pm Moon-Aldebaran: 1.1° S
    08  We  6:33 pm Moon North Dec.: 20.8° N
    08  We  9:59 pm Mercury Inferior Conj.
    10  Fr  9:40 am Moon Ascending Node
    10  Fr  2:05 pm Moon Perigee: 358100 km
    11  Sa  5:47 am Partial Solar Eclipse (NE Canada to Asia)
    11  Sa  5:58 am New Moon
    12  Su  8:44 pm Perseid Meteor Shower: ZHR = 90
    14  Tu  9:35 am Moon-Venus: 6.4° S
    17  Fr  6:38 am Moon-Jupiter: 4.8° S
    17  Fr 11:59 am Venus Greatest Elongation: 45.9° E
    18  Sa  3:49 am First Quarter
    20  Mo 10:07 pm Mercury-Beehive: 5.9° S
    21  Tu  5:55 am Moon-Saturn: 2.4° S
    21  Tu 10:58 pm Moon South Dec.: 20.8° S
    23  Th  7:23 am Moon Apogee: 405700 km
    24  Fr 12:51 am Moon Descending Node
    26  Su  7:56 am Full Moon
    26  Su  3:59 pm Mercury Greatest Elongation: 18.3° W
Sep 01  Sa          Venus: 45° 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
     August, 2018    Local time zone: EDT
     +-----------------------------------------------------------------------+
     | DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
     |      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
     +=======================================================================+
     |Wed  1| 06:29a  09:08p  14:39 | 10:23p  05:13a |      Rise 11:43p   77%|
     |Thu  2| 06:30a  09:07p  14:37 | 10:22p  05:14a |      Rise 12:09a   68%|
     |Fri  3| 06:31a  09:05p  14:34 | 10:20p  05:16a |      Rise 12:37a   58%|
     |Sat  4| 06:32a  09:04p  14:32 | 10:18p  05:17a |L Qtr Rise 01:08a   47%|
     +------+-----------------------+----------------+-----------------------+
     |Sun  5| 06:33a  09:03p  14:29 | 10:17p  05:19a |      Rise 01:44a   37%|
     |Mon  6| 06:34a  09:01p  14:27 | 10:15p  05:20a |      Rise 02:27a   26%|
     |Tue  7| 06:35a  09:00p  14:24 | 10:13p  05:22a |      Rise 03:18a   17%|
     |Wed  8| 06:37a  08:59p  14:22 | 10:11p  05:23a |      Rise 04:20a    9%|
     |Thu  9| 06:38a  08:57p  14:19 | 10:10p  05:25a |      Rise 05:30a    3%|
     |Fri 10| 06:39a  08:56p  14:16 | 10:08p  05:26a |      Rise 06:45a    0%|
     |Sat 11| 06:40a  08:54p  14:14 | 10:06p  05:28a |New   Set  09:21p    1%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 12| 06:41a  08:53p  14:11 | 10:04p  05:29a |      Set  09:58p    4%|
     |Mon 13| 06:42a  08:51p  14:08 | 10:02p  05:31a |      Set  10:30p   10%|
     |Tue 14| 06:44a  08:50p  14:06 | 10:00p  05:32a |      Set  11:00p   17%|
     |Wed 15| 06:45a  08:48p  14:03 | 09:59p  05:34a |      Set  11:29p   27%|
     |Thu 16| 06:46a  08:46p  14:00 | 09:57p  05:35a |      Set  11:59p   36%|
     |Fri 17| 06:47a  08:45p  13:57 | 09:55p  05:37a |      Set  12:29a   47%|
     |Sat 18| 06:48a  08:43p  13:54 | 09:53p  05:38a |F Qtr Set  01:03a   57%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 19| 06:49a  08:42p  13:52 | 09:51p  05:40a |      Set  01:40a   66%|
     |Mon 20| 06:51a  08:40p  13:49 | 09:49p  05:41a |      Set  02:22a   75%|
     |Tue 21| 06:52a  08:38p  13:46 | 09:47p  05:43a |      Set  03:09a   83%|
     |Wed 22| 06:53a  08:37p  13:43 | 09:45p  05:44a |      Set  04:00a   89%|
     |Thu 23| 06:54a  08:35p  13:40 | 09:43p  05:46a |      Set  04:56a   94%|
     |Fri 24| 06:55a  08:33p  13:37 | 09:41p  05:47a |      Set  05:54a   98%|
     |Sat 25| 06:56a  08:31p  13:34 | 09:39p  05:48a |      Set  06:54a  100%|
     +------+-----------------------+----------------+-----------------------+
     |Sun 26| 06:58a  08:30p  13:31 | 09:37p  05:50a |Full  Rise 08:54p  100%|
     |Mon 27| 06:59a  08:28p  13:29 | 09:35p  05:51a |      Rise 09:21p   98%|
     |Tue 28| 07:00a  08:26p  13:26 | 09:33p  05:53a |      Rise 09:47p   94%|
     |Wed 29| 07:01a  08:24p  13:23 | 09:31p  05:54a |      Rise 10:13p   88%|
     |Thu 30| 07:02a  08:23p  13:20 | 09:29p  05:56a |      Rise 10:40p   81%|
     |Fri 31| 07:04a  08:21p  13:17 | 09:27p  05:57a |      Rise 11:09p   72%|
     +-----------------------------------------------------------------------+
     * Nautical Twilight
     ** Moon rise or moon set, whichever occurs between sunrise and sunset

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

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.

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