Home > Ephemeris Program, Month preview > 06/30/2016 – Ephemeris – Previewing July’s skies

06/30/2016 – Ephemeris – Previewing July’s skies

June 30, 2016

Ephemeris for Thursday, June 30th.  Today the Sun will be up for 15 hours and 31 minutes, setting at 9:32, and it will rise tomorrow at 6:01.  The Moon, 3 days past last quarter, will rise at 3:49 tomorrow morning.

Lets preview July’s skies. The sun, having reached its northern solstice, is beginning to slide southward again, at first imperceptibly, then with greater speed.  The daylight hours will decrease from 15 hours and 30 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.  Despite the warmth, the earth will reach its greatest distance from the Sun on Monday the 4th where the fireworks will begin in earnest when the Juno spacecraft lights its rocket engine to enter orbit Jupiter.

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


July Star Chart

July 2016 star chart

Star Chart for July 2016. Created using my LookingUp program. To enlarge in Firefox right-click on image then click View image.

Star Chart for July 2016. Created using my LookingUp program. To enlarge in Firefox Right-click on image then click View image.

The planets and stars are plotted for the 15th at 11 p.m. EDT.  That is chart time.  Note, Traverse City is located approximately 45 minutes behind our time meridian.  (An hour 45 minutes behind our daylight saving time meridian.) To duplicate the star positions on a planisphere you may have to set it to 1:45 earlier than the current time if you are near your time meridian.

Evening nautical twilight ends at 10:57 p.m. EDT on the 1st, increasing to 10:24 p.m. EDT on the 31st.

Morning nautical twilight starts at 4:35 a.m. EDT on the 1st, and decreasing to 5:2 a.m. EDT on the 31st.

Add a half hour to the chart time every week before the 15th and subtract a half hour for every week after the 15th.  Before the 13th also subtract an hour for Standard Time.

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
  • A leaky Big Dipper drips on Leo
  • Follow the arc of the handle of the Big Dipper to the star Arcturus
  • Extend the arc to a spike to point to Spica.
  • The Summer Triangle is outlined in red.  Vega in Lyra (Lyr), Deneb in Cygnus (Cyg) and Altair in Aquila (Aql).

Calendar of Planetary Events

Credit:  Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC)

To generate your own calendar go to http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html

Times are Eastern Time.  Some additions made to aid clarity.

    Date    Time      Event
Jul 01  Fr            Venus: 6.8° E
    01  Fr  2:45 a.m. Moon Perigee: 366000 km
    01  Fr 11:58 p.m. Moon-Aldebaran: 0.4° S
    03  Su  4:06 p.m. Moon North Dec.: 18.6° N
    04  Mo  7:01 a.m. New Moon
    04  Mo 11:59 a.m. Aphelion: 1.0168 AU
    06  We 11:12 p.m. Mercury Superior Conj.
    07  Th  7:33 p.m. Moon-Regulus: 1.9° N
    08  Fr  9:42 p.m. Moon Ascending Node
    09  Sa  6:08 a.m. Moon-Jupiter: 0.9° N
    11  Mo  8:52 p.m. First Quarter
    13  We  1:24 a.m. Moon Apogee: 404300 km
    16  Sa  1:11 a.m. Moon-Saturn: 3.8° S
    17  Su 11:41 p.m. Moon South Dec.: 18.6° S
    19  Tu  6:57 p.m. Full Moon
    23  Sa  3:49 a.m. Moon Descending Node
    26  Tu  7:00 p.m. Last Quarter
    27  We  7:25 a.m. Moon Perigee: 369700 km
    27  We  4:32 p.m. Delta Aquarid Shower: ZHR = 20
    29  Fr  6:53 a.m. Moon-Aldebaran: 0.3° S
    30  Sa 11:55 a.m. Mercury-Regulus: 0.3° N
    31  Su 12:52 a.m. Moon North Dec.: 18.5° N
Aug 01  Mo            Venus: 15.3° E
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