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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.

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11/30/2017 – Ephemeris – Previewing December skies

November 30, 2017 1 comment

Ephemeris for Thursday, November 30th. The Sun will rise at 7:58. It’ll be up for 9 hours and 5 minutes, setting at 5:03. The Moon, 3 days before full, will set at 5:07 tomorrow morning.

Tomorrow starts the last month of the 2017. We are now in the holiday season and about to celebrate the southernmost travel of the Sun in the sky and its return northward. The Sun will stop its travel south, the winter solstice on the 21st at 11:29 a.m. That will make that day the shortest day in terms of daylight hours. However the earliest sunset and latest sunrise don’t coincide with that date. The reason is the Earth is closer to the sun than average and moving faster in its orbit of the sun than it normally does. It skews the sunrise and sunset times, making them later than they would be on average. That makes the sunset times bottom out about December 9th. at 5:02 p.m. And that latest sunrise will top out on January 2nd at 8:20 a.m.

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

Addenda

December Evening Sky Chart

December 2017 star chart

Star Chart for December 2017 (9 p.m. December 15, 2017). 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 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.

December Morning Star Chart

Star Chart for December 2017 mornings

Star Chart for December 2017 mornings based on 6 a.m. December 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
  • GemR is the Geminid meteor shower radiant. Peaks on December 14th, the Moon will not interfere this year.

Twilight

Evening nautical twilight ends at 6:16 p.m. EST on the 1st, decreasing to 6:21 p.m. EDT on the 31st.
Evening astronomical twilight ends at 6:51 p.m. EST on the 1st, decreasing to 6:56 p.m. EDT on the 31st.
Morning astronomical twilight starts at 6:20 a.m. EST on the 1st, and increasing to 6:35 a.m. EDT on the 31st.
Morning nautical twilight starts at 6:56 a.m. EST on the 1st, and increasing to 7:10 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

  Date      Time    Event
Dec 01  Fr          Venus: 9.4° W
    03  Su  8:00 am Moon-Aldebaran: 0.8° S
    03  Su 10:47 am Full Moon
    04  Mo  3:42 am Moon Perigee: 357500 km
    05  Tu  6:43 am Moon North Dec.: 20° N
    07  Th  4:30 am Moon-Beehive: 2.5° N
    07  Th  7:39 pm Moon Ascending Node
    08  Fr  5:25 pm Moon-Regulus: 0.7° S
    10  Su  2:51 am Last Quarter
    12  Tu  8:40 pm Mercury Inferior Conjunction with the Sun
    13  We 11:27 am Moon-Mars: 4.5° S
    14  Th  1:07 am Geminid Meteor Shower: ZHR = 120!
    14  Th  9:26 am Moon-Jupiter: 4.7° S
    18  Mo  1:31 am New Moon
    18  Mo  8:27 am Moon Apogee: 406600 km
    19  Tu  4:31 am Moon South Dec.: 20.1° S
    21  Th 11:29 am Winter Solstice
    21  Th  3:18 pm Saturn Conjunction with the Sun
    22  Fr  5:04 am Moon Descending Node
    22  Fr 10:00 am Ursid Meteor Shower: ZHR = 10
                    Note:  The Ursid radiant is near the Little Dipper’s
                           bowl
    26  Tu  4:20 am First Quarter
    30  Sa  7:25 pm Moon-Aldebaran: 0.7° S
Jan 01  Mo          Venus: 1.9° 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 an entire year
or calendar pages for your time zone.

Sun and Moon Rising and Setting Events

     LU                  Ephemeris of Sky Events for Interlochen/TC
December, 2017    Local time zone: EST
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Fri  1| 08:00a  05:03p  09:03 | 06:12p  06:50a |      Set  06:22a   96%|
|Sat  2| 08:01a  05:03p  09:01 | 06:12p  06:51a |      Set  07:38a   99%|
+------+-----------------------+----------------+-----------------------+
|Sun  3| 08:02a  05:02p  09:00 | 06:12p  06:52a |Full  Rise 05:36p  100%|
|Mon  4| 08:03a  05:02p  08:59 | 06:12p  06:53a |      Rise 06:32p   97%|
|Tue  5| 08:04a  05:02p  08:57 | 06:12p  06:54a |      Rise 07:35p   92%|
|Wed  6| 08:05a  05:02p  08:56 | 06:12p  06:55a |      Rise 08:43p   84%|
|Thu  7| 08:06a  05:02p  08:55 | 06:12p  06:56a |      Rise 09:54p   75%|
|Fri  8| 08:07a  05:02p  08:54 | 06:12p  06:57a |      Rise 11:04p   64%|
|Sat  9| 08:08a  05:02p  08:53 | 06:12p  06:58a |      Rise 12:13a   54%|
+------+-----------------------+----------------+-----------------------+
|Sun 10| 08:09a  05:02p  08:52 | 06:12p  06:59a |L Qtr Rise 01:19a   43%|
|Mon 11| 08:10a  05:02p  08:51 | 06:12p  06:59a |      Rise 02:23a   33%|
|Tue 12| 08:11a  05:02p  08:51 | 06:12p  07:00a |      Rise 03:25a   24%|
|Wed 13| 08:11a  05:02p  08:50 | 06:12p  07:01a |      Rise 04:27a   16%|
|Thu 14| 08:12a  05:02p  08:49 | 06:13p  07:02a |      Rise 05:27a   10%|
|Fri 15| 08:13a  05:02p  08:49 | 06:13p  07:02a |      Rise 06:26a    5%|
|Sat 16| 08:14a  05:03p  08:49 | 06:13p  07:03a |      Rise 07:22a    2%|
+------+-----------------------+----------------+-----------------------+
|Sun 17| 08:14a  05:03p  08:48 | 06:14p  07:04a |      Rise 08:16a    0%|
|Mon 18| 08:15a  05:03p  08:48 | 06:14p  07:04a |New   Set  05:46p    1%|
|Tue 19| 08:16a  05:04p  08:48 | 06:14p  07:05a |      Set  06:34p    3%|
|Wed 20| 08:16a  05:04p  08:48 | 06:15p  07:05a |      Set  07:27p    6%|
|Thu 21| 08:17a  05:05p  08:48 | 06:15p  07:06a |      Set  08:23p   12%|
|Fri 22| 08:17a  05:05p  08:48 | 06:16p  07:06a |      Set  09:22p   19%|
|Sat 23| 08:18a  05:06p  08:48 | 06:16p  07:07a |      Set  10:22p   27%|
+------+-----------------------+----------------+-----------------------+
|Sun 24| 08:18a  05:06p  08:48 | 06:17p  07:07a |      Set  11:24p   36%|
|Mon 25| 08:18a  05:07p  08:48 | 06:18p  07:08a |      Set  12:28a   46%|
|Tue 26| 08:19a  05:08p  08:49 | 06:18p  07:08a |F Qtr Set  01:35a   56%|
|Wed 27| 08:19a  05:08p  08:49 | 06:19p  07:08a |      Set  02:43a   67%|
|Thu 28| 08:19a  05:09p  08:50 | 06:20p  07:09a |      Set  03:55a   77%|
|Fri 29| 08:19a  05:10p  08:50 | 06:20p  07:09a |      Set  05:08a   86%|
|Sat 30| 08:19a  05:11p  08:51 | 06:21p  07:09a |      Set  06:22a   93%|
+------+-----------------------+----------------+-----------------------+
|Sun 31| 08:20a  05:12p  08:52 | 06:22p  07:09a |      Set  07:32a   98%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

 

10/31/2017 – Ephemeris – Previewing November skies

October 31, 2017 1 comment

Ephemeris for Halloween, Tuesday, October 31st. The Sun will rise at 8:19. It’ll be up for 10 hours and 13 minutes, setting at 6:32. The Moon, half way from first quarter to full, will set at 4:58 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 tomorrow 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 tomorrow 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, is about 12:30 p.m.

The Leonid meteor shower will reach a peak on the 16th and again on the 17th and is expected to be lackluster and will peak in our afternoon both days, and may only produce 10 meteors per hour.

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

Addenda

November Evening Sky Chart

November star chart

Star Chart for November 2017 (9 p.m. November 15, 2017). 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 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.

November Morning Star Chart

Morning Star Chart

Star Chart for November 2017 mornings based on 6 a.m. November 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 and
  • Follow the spike to Spica
  • The Summer Triangle is in red
  • LeoR is the Leonid meteor shower radiant. Peaks on November 16th and 17th.

Twilight

Evening nautical twilight ends at 7:39 p.m. EDT on the 1st, decreasing to 6:16 p.m. EST on the 30th.
Evening astronomical twilight ends at 8:13 p.m. EDT on the 1st, decreasing to 6:51 p.m. EST on the 30th.
Morning astronomical twilight starts at 6:47 a.m. EDT on the 1st, and increasing to 6:19 a.m. EST on the 30th.
Morning nautical twilight starts at 7:21 a.m. EDT on the 1st, and increasing to 6:55 a.m. EST on the 30th.

NASA Calendar of Planetary Events

    Date   Time     Event 
Nov 01  We          Venus: 16.8° W
    02  Th  8:58 am Venus-Spica: 3.5° N
    04  Sa 12:23 am Full Moon
    05  Su  6:22 am South Taurid Shower: ZHR = 5
    05  Su  7:09 am Moon Perigee: 361400 km
    05  Su  9:19 pm Moon-Aldebaran: 0.7° S
    07  Tu  8:28 pm Moon North Dec.: 19.8° N
    09  Th  8:58 pm Moon-Beehive: 2.7° N
    10  Fr  3:37 pm Last Quarter
    10  Fr  5:40 pm Moon Ascending Node
    11  Sa 11:07 am Moon-Regulus: 0.4° S
    12  Su  5:39 am North Taurid Shower: ZHR = 5
    12  Su 12:48 pm Mercury-Antares: 2.2° N
    14  Tu  7:40 pm Moon-Mars: 3.4° S
    17  Fr 11:56 am Leonid Shower: ZHR = 10
    18  Sa  6:42 am New Moon
    20  Mo  7:34 am Moon-Saturn: 3.3° S
    21  Tu  1:52 pm Moon Apogee: 406100 km
    21  Tu  9:06 pm Moon South Dec.: 20° S
    23  Th  6:59 pm Mercury Elongation: 22° E
    25  Sa  3:22 am Moon Descending Node
    26  Su 12:03 pm First Quarter
    29  We  9:27 am Mars-Spica: 3.1° N
Dec 01  Fr          Venus: 9.4° 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

     LU                  Ephemeris of Sky Events for Interlochen/TC
November, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Wed  1| 08:21a  06:31p  10:09 | 07:36p  07:16a |      Set  06:08a   93%|
|Thu  2| 08:22a  06:29p  10:07 | 07:34p  07:17a |      Set  07:21a   98%|
|Fri  3| 08:23a  06:28p  10:04 | 07:33p  07:18a |      Set  08:36a  100%|
|Sat  4| 08:25a  06:27p  10:01 | 07:32p  07:19a |Full  Rise 07:18p   99%|
+------+-----------------------+----------------+-----------------------+
| EST  |      Time Change      |                |                       |
|Sun  5| 07:26a  05:25p  09:59 | 06:31p  06:21a |      Rise 07:01p   95%|
|Mon  6| 07:27a  05:24p  09:56 | 06:30p  06:22a |      Rise 07:52p   89%|
|Tue  7| 07:29a  05:23p  09:53 | 06:29p  06:23a |      Rise 08:49p   80%|
|Wed  8| 07:30a  05:22p  09:51 | 06:27p  06:24a |      Rise 09:52p   70%|
|Thu  9| 07:32a  05:20p  09:48 | 06:26p  06:25a |      Rise 10:59p   60%|
|Fri 10| 07:33a  05:19p  09:46 | 06:25p  06:27a |L Qtr Rise 12:07a   48%|
|Sat 11| 07:34a  05:18p  09:43 | 06:24p  06:28a |      Rise 01:15a   38%|
+------+-----------------------+----------------+-----------------------+
|Sun 12| 07:36a  05:17p  09:41 | 06:24p  06:29a |      Rise 02:21a   28%|
|Mon 13| 07:37a  05:16p  09:38 | 06:23p  06:30a |      Rise 03:26a   19%|
|Tue 14| 07:38a  05:15p  09:36 | 06:22p  06:31a |      Rise 04:30a   12%|
|Wed 15| 07:40a  05:14p  09:34 | 06:21p  06:33a |      Rise 05:32a    6%|
|Thu 16| 07:41a  05:13p  09:31 | 06:20p  06:34a |      Rise 06:34a    2%|
|Fri 17| 07:42a  05:12p  09:29 | 06:19p  06:35a |      Rise 07:34a    0%|
|Sat 18| 07:44a  05:11p  09:27 | 06:19p  06:36a |New   Set  05:48p    0%|
+------+-----------------------+----------------+-----------------------+
|Sun 19| 07:45a  05:10p  09:25 | 06:18p  06:37a |      Set  06:24p    2%|
|Mon 20| 07:46a  05:09p  09:23 | 06:17p  06:38a |      Set  07:04p    6%|
|Tue 21| 07:48a  05:09p  09:21 | 06:17p  06:40a |      Set  07:50p   11%|
|Wed 22| 07:49a  05:08p  09:19 | 06:16p  06:41a |      Set  08:39p   17%|
|Thu 23| 07:50a  05:07p  09:17 | 06:16p  06:42a |      Set  09:33p   25%|
|Fri 24| 07:51a  05:07p  09:15 | 06:15p  06:43a |      Set  10:31p   34%|
|Sat 25| 07:53a  05:06p  09:13 | 06:15p  06:44a |      Set  11:31p   43%|
+------+-----------------------+----------------+-----------------------+
|Sun 26| 07:54a  05:05p  09:11 | 06:14p  06:45a |F Qtr Set  12:33a   53%|
|Mon 27| 07:55a  05:05p  09:09 | 06:14p  06:46a |      Set  01:38a   63%|
|Tue 28| 07:56a  05:04p  09:08 | 06:13p  06:47a |      Set  02:45a   73%|
|Wed 29| 07:57a  05:04p  09:06 | 06:13p  06:48a |      Set  03:54a   82%|
|Thu 30| 07:59a  05:03p  09:04 | 06:13p  06:49a |      Set  05:07a   90%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

 

10/02/2017 – Ephemeris – Looking ahead at October skies

October 2, 2017 1 comment

Ephemeris for Monday, October 2nd. The Sun will rise at 7:41. It’ll be up for 11 hours and 38 minutes, setting at 7:20. The Moon, 3 days before full, will set at 5:04 tomorrow morning.

Let’s look at the skies for this month of October. The sun will still be moving south rapidly. Daylight hours in the Interlochen/Traverse City area will drop from 11 hours and 38 minutes today to 10 hours 13 minutes on the 31st. The altitude of the sun above the southern horizon at local noon will be 42 degrees today, and will descend to 31 degrees on Halloween, also in the Interlochen/Traverse City area. The Straits area will have the sun a degree lower. Local noon, when the sun is due south will be about 1:30 p.m. in Interlochen/Traverse City.

Later this month Jupiter will cross from the evening sky to the morning. Saturn will become lower in the southwest in the evening sky. And bits of Halley’s comet will return later in the month as the Orion meteor shower.

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

Addenda

October Evening Sky Chart

October Star Chart

Star Chart for October 2017 (9 p.m. October 15, 2017). 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 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.

October Morning Star Chart

Morning star chart

Star Chart for October 2017 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.
  • 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
  • DraR is the Draconid meteor shower radiant.  Peaks on October 8th, but the Moon will interfere this year.
  • OriR is the Orionid meteor shower radiant.  Peaks on October 21st with a zenithal hourly rate (ZHR) of 20

Twilight

Evening nautical twilight ends at 8:29 p.m. EDT on the 1st, decreasing to 7:40 p.m. EDT on the 31st.
Evening astronomical twilight ends at 9:03 p.m. EDT on the 1st, decreasing to 8:14 p.m. EDT on the 31st.
Morning astronomical twilight starts at 6:09 a.m. EDT on the 1st, and increasing to 6:07 a.m. EDT on the 31st.
Morning nautical twilight starts at 6:43 a.m. EDT on the 1st, and increasing to 6:42 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

Oct 01  Su          Venus: 24.5° W
    01  Su 10:05 pm Moon Descending Node
    05  Th 12:15 pm Venus-Mars: 0.2° N
    05  Th  2:40 pm Full Moon (Harvest Moon)
    08  Su  4:33 pm Mercury Superior Conjunction with the Sun
    09  Mo  1:51 am Moon Perigee: 366,900 km
    09  Mo  2:05 pm Moon-Aldebaran: 0.6° S
    11  We  2:21 pm Moon North Dec.: 19.6° N
    12  Th  8:25 am Last Quarter
    13  Fr  4:29 pm Moon-Beehive: 3° N
    14  Sa  6:10 pm Moon Ascending Node
    15  Su  6:54 am Moon-Regulus: 0.2° S
    17  Tu  6:04 am Moon-Mars: 1.9° S
    17  Tu  8:21 pm Moon-Venus: 2.1° S
    19  Th  1:24 pm Uranus Opposition from the Sun
    19  Th  3:12 pm New Moon
    21  Sa  6:54 am Orionid Shower: ZHR = 20
    24  Tu  7:54 am Moon-Saturn: 3.6° S
    24  Tu 10:25 pm Moon Apogee: 405,200 km
    25  We  2:13 pm Moon South Dec.: 19.7° S
    26  Th  2:02 pm Jupiter Conjunction with the Sun
    27  Fr  6:22 pm First Quarter
    29  Su  2:41 pm Moon Descending Node
Nov 01  We          Venus: 16.8° 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

LU                  Ephemeris of Sky Events for Interlochen/TC
October, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun  1| 07:41a  07:22p  11:41 | 08:25p  06:38a |      Set  04:00a   84%|
|Mon  2| 07:42a  07:20p  11:38 | 08:23p  06:39a |      Set  05:05a   91%|
|Tue  3| 07:43a  07:19p  11:35 | 08:22p  06:40a |      Set  06:12a   96%|
|Wed  4| 07:44a  07:17p  11:32 | 08:20p  06:41a |      Set  07:21a   99%|
|Thu  5| 07:45a  07:15p  11:29 | 08:18p  06:42a |Full  Rise 07:38p  100%|
|Fri  6| 07:47a  07:13p  11:26 | 08:16p  06:44a |      Rise 08:10p   98%|
|Sat  7| 07:48a  07:11p  11:23 | 08:14p  06:45a |      Rise 08:45p   93%|
+------+-----------------------+----------------+-----------------------+
|Sun  8| 07:49a  07:10p  11:20 | 08:12p  06:46a |      Rise 09:25p   86%|
|Mon  9| 07:50a  07:08p  11:17 | 08:11p  06:47a |      Rise 10:09p   77%|
|Tue 10| 07:52a  07:06p  11:14 | 08:09p  06:49a |      Rise 11:01p   67%|
|Wed 11| 07:53a  07:04p  11:11 | 08:07p  06:50a |      Rise 11:59p   56%|
|Thu 12| 07:54a  07:02p  11:08 | 08:05p  06:51a |L Qtr Rise 01:02a   45%|
|Fri 13| 07:56a  07:01p  11:05 | 08:04p  06:52a |      Rise 02:08a   34%|
|Sat 14| 07:57a  06:59p  11:02 | 08:02p  06:54a |      Rise 03:16a   24%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 07:58a  06:57p  10:59 | 08:00p  06:55a |      Rise 04:23a   15%|
|Mon 16| 07:59a  06:56p  10:56 | 07:59p  06:56a |      Rise 05:30a    8%|
|Tue 17| 08:01a  06:54p  10:53 | 07:57p  06:57a |      Rise 06:35a    4%|
|Wed 18| 08:02a  06:52p  10:50 | 07:56p  06:58a |      Rise 07:39a    1%|
|Thu 19| 08:03a  06:50p  10:47 | 07:54p  07:00a |New   Set  07:14p    0%|
|Fri 20| 08:05a  06:49p  10:44 | 07:52p  07:01a |      Set  07:43p    2%|
|Sat 21| 08:06a  06:47p  10:41 | 07:51p  07:02a |      Set  08:14p    5%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 08:07a  06:46p  10:38 | 07:49p  07:03a |      Set  08:49p   10%|
|Mon 23| 08:09a  06:44p  10:35 | 07:48p  07:05a |      Set  09:27p   16%|
|Tue 24| 08:10a  06:42p  10:32 | 07:46p  07:06a |      Set  10:09p   24%|
|Wed 25| 08:11a  06:41p  10:29 | 07:45p  07:07a |      Set  10:56p   32%|
|Thu 26| 08:13a  06:39p  10:26 | 07:44p  07:08a |      Set  11:48p   41%|
|Fri 27| 08:14a  06:38p  10:23 | 07:42p  07:09a |F Qtr Set  12:44a   51%|
|Sat 28| 08:15a  06:36p  10:21 | 07:41p  07:11a |      Set  01:43a   60%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 08:17a  06:35p  10:18 | 07:39p  07:12a |      Set  02:45a   70%|
|Mon 30| 08:18a  06:33p  10:15 | 07:38p  07:13a |      Set  03:51a   79%|
|Tue 31| 08:19a  06:32p  10:12 | 07:37p  07:14a |      Set  04:58a   87%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

08/31/2017 – Ephemeris – Looking ahead at the month of September

August 31, 2017 1 comment

Ephemeris for Thursday, August 31st. The Sun will rise at 7:04. It’ll be up for 13 hours and 16 minutes, setting at 8:20. The Moon, 2 days past first quarter, will set at 2:24 tomorrow morning.

Let’s look at the skies for the month of September. The sun will moving at its greatest speed in its retreat to the south. Daylight hours in the Interlochen/Traverse City area and will drop from 13 hours and 13 minutes tomorrow to 11 hours 44 minutes on the 30th. The altitude of the sun above the southern horizon at local noon will be 54 degrees tomorrow, and will descend to 42 degrees on the 30th. The season of summer is getting short, so enjoy it while you can. Summer ends and autumn begins at 4:02 p.m. on September 22nd. We are losing Jupiter in the evening sky in September, but this month, but on the 12th Mercury will be at its greatest separation from the Sun in the morning sky and relatively easy to spot.

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

Addenda

September Evening Sky Chart

September Star Chart

Star Chart for September 2017 (10 p.m. September 15, 2017). 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 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 10 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.

September Morning Star Chart

Morning Star Chart

Star Chart for September 2017 mornings based on 6 a.m. September 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

Evening nautical twilight ends at 9:28 p.m. EDT on the 1st, decreasing to 8:31 p.m. EDT on the 30th.
Evening astronomical twilight ends at 10:06 p.m. EDT on the 1st, decreasing to 9:05 p.m. EDT on the 30th.
Morning astronomical twilight starts at 5:26 a.m. EDT on the 1st, and increasing to 6:07 a.m. EDT on the 30th.
Morning nautical twilight starts at 6:04 a.m. EDT on the 1st, and increasing to 6:42 a.m. EDT on the 30th.

NASA Calendar of Planetary Events

Sep 01  Fr          Venus: 31.7° W
    01  Fr  2:10 am Venus-Beehive: 1.5° S
    04  Mo  2:41 pm Moon Descending Node
    05  Tu 12:18 am Neptune Opposition
    06  We  3:03 am Full Moon
    10  Su  1:30 am Mercury-Regulus: 0.7° S
    10  Su  5:39 pm Jupiter-Spica: 3.1° N
    12  Tu  5:59 am Mercury Elongation: 17.9° W
    12  Tu  8:09 am Moon-Aldebaran: 0.4° S
    13  We  2:25 am Last Quarter
    13  We 12:04 pm Moon Perigee: 369900 km
    14  Th  9:00 am Moon North Dec.: 19.4° N
    16  Sa 10:50 am Moon-Beehive: 3.2° N
    16  Sa  2:26 pm Mercury-Mars Conjunction: 0.1° N
    17  Su  2:28 pm Moon Ascending Node
    17  Su  8:56 pm Moon-Venus: 0.6° N
    18  Mo 12:32 am Moon-Regulus: 0.1° S
    19  Tu  5:30 pm Venus-Regulus: 0.5° N
    20  We  1:30 am New Moon
    22  Fr  3:51 am Moon-Jupiter: 4° S
    22  Fr  4:02 pm  Autumnal Equinox
    26  Tu  8:09 pm Moon-Saturn: 3.8° S
    27  We  2:49 am Moon Apogee: 404300 km
    27  We 10:54 pm First Quarter
    28  Th  6:06 am Moon South Dec.: 19.5° S
Oct 01  Su          Venus: 24.5° 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.

August Sun and Moon Rising and Setting Events

LU                Ephemeris of Sky Events for Interlochen/TC
September, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Fri  1| 07:05a  08:18p  13:13 | 09:25p  05:59a |      Set  03:16a   82%|
|Sat  2| 07:06a  08:17p  13:10 | 09:23p  06:00a |      Set  04:13a   89%|
+------+-----------------------+----------------+-----------------------+
|Sun  3| 07:07a  08:15p  13:07 | 09:21p  06:01a |      Set  05:13a   94%|
|Mon  4| 07:09a  08:13p  13:04 | 09:19p  06:03a |      Set  06:17a   98%|
|Tue  5| 07:10a  08:11p  13:01 | 09:17p  06:04a |      Set  07:22a  100%|
|Wed  6| 07:11a  08:09p  12:58 | 09:14p  06:05a |Full  Rise 08:38p   99%|
|Thu  7| 07:12a  08:07p  12:55 | 09:12p  06:07a |      Rise 09:08p   97%|
|Fri  8| 07:13a  08:06p  12:52 | 09:10p  06:08a |      Rise 09:39p   91%|
|Sat  9| 07:14a  08:04p  12:49 | 09:08p  06:09a |      Rise 10:11p   84%|
+------+-----------------------+----------------+-----------------------+
|Sun 10| 07:16a  08:02p  12:46 | 09:06p  06:11a |      Rise 10:47p   75%|
|Mon 11| 07:17a  08:00p  12:43 | 09:04p  06:12a |      Rise 11:27p   64%|
|Tue 12| 07:18a  07:58p  12:40 | 09:02p  06:13a |      Rise 12:13a   53%|
|Wed 13| 07:19a  07:56p  12:37 | 09:00p  06:15a |L Qtr Rise 01:05a   42%|
|Thu 14| 07:20a  07:54p  12:34 | 08:58p  06:16a |      Rise 02:05a   31%|
|Fri 15| 07:21a  07:52p  12:30 | 08:56p  06:17a |      Rise 03:10a   21%|
|Sat 16| 07:23a  07:51p  12:27 | 08:54p  06:19a |      Rise 04:18a   12%|
+------+-----------------------+----------------+-----------------------+
|Sun 17| 07:24a  07:49p  12:24 | 08:52p  06:20a |      Rise 05:27a    6%|
|Mon 18| 07:25a  07:47p  12:21 | 08:50p  06:21a |      Rise 06:36a    2%|
|Tue 19| 07:26a  07:45p  12:18 | 08:48p  06:22a |      Rise 07:43a    0%|
|Wed 20| 07:27a  07:43p  12:15 | 08:46p  06:24a |New   Set  08:17p    1%|
|Thu 21| 07:29a  07:41p  12:12 | 08:44p  06:25a |      Set  08:45p    4%|
|Fri 22| 07:30a  07:39p  12:09 | 08:42p  06:26a |      Set  09:14p    8%|
|Sat 23| 07:31a  07:37p  12:06 | 08:41p  06:28a |      Set  09:44p   15%|
+------+-----------------------+----------------+-----------------------+
|Sun 24| 07:32a  07:35p  12:03 | 08:39p  06:29a |      Set  10:17p   22%|
|Mon 25| 07:33a  07:34p  12:00 | 08:37p  06:30a |      Set  10:52p   30%|
|Tue 26| 07:35a  07:32p  11:57 | 08:35p  06:31a |      Set  11:32p   39%|
|Wed 27| 07:36a  07:30p  11:54 | 08:33p  06:33a |F Qtr Set  12:16a   49%|
|Thu 28| 07:37a  07:28p  11:50 | 08:31p  06:34a |      Set  01:05a   58%|
|Fri 29| 07:38a  07:26p  11:47 | 08:29p  06:35a |      Set  01:59a   68%|
|Sat 30| 07:39a  07:24p  11:44 | 08:27p  06:36a |      Set  02:58a   76%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

08/01/2017 – Ephemeris – A look at the busy month of August in astronomy

August 1, 2017 1 comment

Ephemeris for Tuesday, August 1st. The Sun rises at 6:29. It’ll be up for 14 hours and 38 minutes, setting at 9:07. The Moon, 2 days past first quarter, will set at 2:21 tomorrow morning.

Let’s look ahead at the month of August in the skies. Daylight hours will decrease from 14 hours and 38 minutes today to 13 hours 16 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 today to just over 53 degrees on the 31st. The Perseid meteor shower will reach its peak on the evening of the 12th. However the bright waning gibbous moon will rise just after 11:30 for a very short dark sky viewing period. The big event this month will be the total solar eclipse that will be visible from all 50 of the United States and total for a narrow strip of land stretching from Oregon to South Carolina. That will occur on the afternoon of Monday the 21st.

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

Addenda

August Evening Star Chart

August Star Chart

Star Chart for August 2017 (10 p.m. August 15, 2017). 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 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 if you are near your time meridian.

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. For each week after the 15th subtract ½ hour. The planet positions are updated each Wednesday on this blog.

August Morning Star Chart

Morning Star Chart

Star Chart for August 2017 mornings based on 5 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,
  • Then follow the Spike to Spica
  • The Summer Triangle is in red
  • PerR is the Perseid Meteor Shower radiant

Evening nautical twilight ends at 10:26 p.m. EDT on the 1st, decreasing to 9:30 p.m. EDT on the 31st.
Evening astronomical twilight ends at 11:15 p.m. EDT on the 1st, decreasing to 10:09 p.m. EDT on the 31st.
Morning astronomical twilight starts at 4:30 a.m. EDT on the 1st, and increasing to 5:24 a.m. EDT on the 31st.
Morning nautical twilight starts at 5:19 a.m. EDT on the 1st, and increasing to 6:03 a.m. EDT on the 31st.

NASA Calendar of Planetary Events

Date        Time    Event
Aug 01  Tu          Venus: 38.4° W
    02  We  1:55 pm Moon Apogee: 405000 km
    03  Th  3:31 am Moon-Saturn: 3.8° S
    04  Fr  2:17 pm Moon South Dec.: 19.4° S
    07  Mo  2:11 pm Full Moon
    07  Mo  2:22 pm Partial Lunar Eclipse (Not visible from here)
    08  Tu  6:56 am Moon Descending Node
    12  Sa  2:35 pm Perseid Shower: ZHR = 90
    14  Mo  9:15 pm Last Quarter
    16  We  2:39 am Moon-Aldebaran: 0.4° S
    18  Fr  2:50 am Moon North Dec.: 19.4° N
    18  Fr  9:14 am Moon Perigee: 366100 km
    19  Sa 12:45 am Moon-Venus: 2.3° N
    20  Su  3:15 am Moon-Beehive: 3.2° N
    21  Mo  6:34 am Moon Ascending Node
    21  Mo  2:26 pm Total Solar Eclipse
    21  Mo  2:30 pm New Moon
    25  Fr  9:00 am Moon-Jupiter: 3.7° S
    26  Sa  4:32 pm Mercury Inferior Conj.
    29  Tu  4:13 am First Quarter
    30  We  7:25 am Moon Apogee: 404300 km
    30  We 10:23 am Moon-Saturn: 3.9° S
    31  Th 10:03 pm Moon South Dec.: 19.4° S
Sep 01  Fr          Venus: 31.7° 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.

August Rising and Setting Events

LU                  Ephemeris of Sky Events for Interlochen/TC
August, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Tue  1| 06:29a  09:08p  14:38 | 10:23p  05:13a |      Set  02:21a   72%|
|Wed  2| 06:30a  09:06p  14:36 | 10:21p  05:15a |      Set  03:00a   80%|
|Thu  3| 06:31a  09:05p  14:34 | 10:20p  05:16a |      Set  03:43a   87%|
|Fri  4| 06:32a  09:04p  14:31 | 10:18p  05:18a |      Set  04:32a   93%|
|Sat  5| 06:33a  09:02p  14:29 | 10:16p  05:19a |      Set  05:26a   97%|
+------+-----------------------+----------------+-----------------------+
|Sun  6| 06:34a  09:01p  14:26 | 10:15p  05:21a |      Set  06:24a   99%|
|Mon  7| 06:36a  09:00p  14:23 | 10:13p  05:22a |Full  Rise 09:01p  100%|
|Tue  8| 06:37a  08:58p  14:21 | 10:11p  05:24a |      Rise 09:35p   98%|
|Wed  9| 06:38a  08:57p  14:18 | 10:09p  05:25a |      Rise 10:06p   95%|
|Thu 10| 06:39a  08:55p  14:16 | 10:07p  05:27a |      Rise 10:36p   89%|
|Fri 11| 06:40a  08:54p  14:13 | 10:06p  05:28a |      Rise 11:06p   81%|
|Sat 12| 06:41a  08:52p  14:10 | 10:04p  05:30a |      Rise 11:36p   72%|
+------+-----------------------+----------------+-----------------------+
|Sun 13| 06:43a  08:51p  14:08 | 10:02p  05:31a |      Rise 12:09a   62%|
|Mon 14| 06:44a  08:49p  14:05 | 10:00p  05:33a |L Qtr Rise 12:46a   51%|
|Tue 15| 06:45a  08:48p  14:02 | 09:58p  05:34a |      Rise 01:28a   39%|
|Wed 16| 06:46a  08:46p  13:59 | 09:56p  05:36a |      Rise 02:16a   28%|
|Thu 17| 06:47a  08:44p  13:57 | 09:54p  05:37a |      Rise 03:13a   18%|
|Fri 18| 06:49a  08:43p  13:54 | 09:52p  05:39a |      Rise 04:16a   10%|
|Sat 19| 06:50a  08:41p  13:51 | 09:50p  05:40a |      Rise 05:24a    4%|
+------+-----------------------+----------------+-----------------------+
|Sun 20| 06:51a  08:39p  13:48 | 09:48p  05:42a |      Rise 06:35a    1%|
|Mon 21| 06:52a  08:38p  13:45 | 09:47p  05:43a |New   Set  08:44p    0%|
|Tue 22| 06:53a  08:36p  13:42 | 09:45p  05:44a |      Set  09:18p    2%|
|Wed 23| 06:54a  08:34p  13:39 | 09:43p  05:46a |      Set  09:49p    6%|
|Thu 24| 06:56a  08:33p  13:37 | 09:41p  05:47a |      Set  10:18p   12%|
|Fri 25| 06:57a  08:31p  13:34 | 09:39p  05:49a |      Set  10:46p   20%|
|Sat 26| 06:58a  08:29p  13:31 | 09:37p  05:50a |      Set  11:15p   28%|
+------+-----------------------+----------------+-----------------------+
|Sun 27| 06:59a  08:27p  13:28 | 09:35p  05:52a |      Set  11:46p   37%|
|Mon 28| 07:00a  08:26p  13:25 | 09:33p  05:53a |      Set  12:19a   47%|
|Tue 29| 07:01a  08:24p  13:22 | 09:31p  05:54a |F Qtr Set  12:56a   56%|
|Wed 30| 07:03a  08:22p  13:19 | 09:29p  05:56a |      Set  01:38a   65%|
|Thu 31| 07:04a  08:20p  13:16 | 09:27p  05:57a |      Set  02:24a   74%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

06/30/2017 – Ephemeris – A look ahead at the month of July

June 30, 2017 1 comment

Ephemeris for Friday, June 30th. Today the Sun will be up for 15 hours and 30 minutes, setting at 9:31, and it will rise tomorrow at 6:01. The Moon, at first quarter today, will set at 1:48 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 29 minutes tomorrow to 14 hours 40 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 tomorrow 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 late Monday. The planet Jupiter will descend lower and lower in the west as the month progresses.

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

Addenda

July Evening Star Chart

June Star Chart

Star Chart for July 2017 (11 p.m. July 15, 2017). 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 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 11 p.m. and 4:30 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.

July Morning Star Chart

Star Chart for June 2017 mornings

Star Chart for July 2017 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.

  • 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,
  • Then follow the Spike to Spica
  • The Summer Triangle is in red
  • DAqr is the Delta Aquariid Meteor Shower radiant

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 p.m. EDT on the 1st, decreasing to 11:17 p.m. EDT on the 31st.
Morning astronomical twilight starts at 3:41 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  Sa          Venus: 43.7° W
    01  Sa  3:28 am Moon-Jupiter: 2.9° S
    03  Mo  8:59 pm Aphelion: 1.0167 AU
    04  Tu  8:21 pm Venus-Pleiades: 6.7° S
    06  Th 12:27 am Moon Apogee: 405900 km
    06  Th 11:34 pm Moon-Saturn: 3.6° S
    08  Sa  6:49 am Moon South Dec.: 19.4° S
    09  Su 12:07 am Full Moon
    09  Su  9:33 pm Mercury-Beehive: 0.1° N
    12  We  1:17 am Moon Descending Node
    13  Th  2:06 pm Venus-Aldebaran: 3.1° N
    16  Su  3:26 pm Last Quarter
    19  We  7:37 pm Moon-Aldebaran: 0.4° S
    20  Th  7:13 am Moon-Venus: 2.7° N
    21  Fr  1:09 pm Moon Perigee: 361200 km
    21  Fr  6:11 pm Moon North Dec.: 19.4° N
    23  Su  5:46 am New Moon
    24  Mo  8:47 pm Moon Ascending Node
    25  Tu  4:49 am Moon-Mercury: 0.9° S
    25  Tu  6:14 am Moon-Regulus: 0°
    25  Tu  1:07 pm Mercury-Regulus: 0.9° S
    26  We  7:59 pm Mars Conjunction
    27  Th 10:41 pm Delta Aquariid Meteor Shower: ZHR = 20
    28  Fr  4:15 pm Moon-Jupiter: 3.4° S
    29  Sa 11:59 pm Mercury Elongation: 27.2° E
    30  Su 11:23 am First Quarter
Aug 01  Tu       Venus: 38.4° 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.

July Rising and Setting Events

     LU                  Ephemeris of Sky Events for Interlochen/TC
July, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sat  1| 06:01a  09:32p  15:30 | 10:57p  04:35a |      Set  02:16a   60%|
+------+-----------------------+----------------+-----------------------+
|Sun  2| 06:01a  09:31p  15:29 | 10:56p  04:36a |      Set  02:44a   69%|
|Mon  3| 06:02a  09:31p  15:29 | 10:56p  04:37a |      Set  03:13a   77%|
|Tue  4| 06:03a  09:31p  15:28 | 10:55p  04:38a |      Set  03:46a   85%|
|Wed  5| 06:03a  09:30p  15:27 | 10:55p  04:39a |      Set  04:22a   91%|
|Thu  6| 06:04a  09:30p  15:26 | 10:54p  04:39a |      Set  05:02a   96%|
|Fri  7| 06:05a  09:30p  15:24 | 10:54p  04:40a |      Set  05:48a   99%|
|Sat  8| 06:05a  09:29p  15:23 | 10:53p  04:41a |      Set  06:38a  100%|
+------+-----------------------+----------------+-----------------------+
|Sun  9| 06:06a  09:29p  15:22 | 10:52p  04:43a |Full  Rise 09:45p   99%|
|Mon 10| 06:07a  09:28p  15:21 | 10:51p  04:44a |      Rise 10:25p   97%|
|Tue 11| 06:08a  09:28p  15:19 | 10:50p  04:45a |      Rise 11:00p   92%|
|Wed 12| 06:09a  09:27p  15:18 | 10:49p  04:46a |      Rise 11:32p   86%|
|Thu 13| 06:09a  09:26p  15:16 | 10:48p  04:47a |      Rise 12:03a   78%|
|Fri 14| 06:10a  09:26p  15:15 | 10:47p  04:48a |      Rise 12:32a   69%|
|Sat 15| 06:11a  09:25p  15:13 | 10:46p  04:49a |      Rise 01:02a   59%|
+------+-----------------------+----------------+-----------------------+
|Sun 16| 06:12a  09:24p  15:12 | 10:45p  04:51a |L Qtr Rise 01:33a   48%|
|Mon 17| 06:13a  09:23p  15:10 | 10:44p  04:52a |      Rise 02:08a   37%|
|Tue 18| 06:14a  09:23p  15:08 | 10:43p  04:53a |      Rise 02:47a   26%|
|Wed 19| 06:15a  09:22p  15:06 | 10:42p  04:55a |      Rise 03:33a   16%|
|Thu 20| 06:16a  09:21p  15:04 | 10:41p  04:56a |      Rise 04:26a    8%|
|Fri 21| 06:17a  09:20p  15:02 | 10:39p  04:57a |      Rise 05:28a    3%|
|Sat 22| 06:18a  09:19p  15:00 | 10:38p  04:59a |      Rise 06:35a    0%|
+------+-----------------------+----------------+-----------------------+
|Sun 23| 06:19a  09:18p  14:58 | 10:37p  05:00a |New   Set  09:31p    1%|
|Mon 24| 06:20a  09:17p  14:56 | 10:35p  05:01a |      Set  10:13p    3%|
|Tue 25| 06:21a  09:16p  14:54 | 10:34p  05:03a |      Set  10:49p    9%|
|Wed 26| 06:22a  09:15p  14:52 | 10:32p  05:04a |      Set  11:21p   16%|
|Thu 27| 06:23a  09:14p  14:50 | 10:31p  05:06a |      Set  11:50p   25%|
|Fri 28| 06:24a  09:13p  14:48 | 10:29p  05:07a |      Set  12:18a   34%|
|Sat 29| 06:25a  09:11p  14:45 | 10:28p  05:09a |      Set  12:46a   44%|
+------+-----------------------+----------------+-----------------------+
|Sun 30| 06:27a  09:10p  14:43 | 10:26p  05:10a |F Qtr Set  01:15a   53%|
|Mon 31| 06:28a  09:09p  14:41 | 10:25p  05:12a |      Set  01:47a   63%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise

Above created using my LookingUp program for MS-DOS