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05/30/2014 – Ephemeris – Previewing June skies or Where’d the night go?

May 30, 2014

Ephemeris for Friday, May 30th.  Today the sun will be up for 15 hours and 17 minutes, setting at 9:18.   The moon, 2 days past new, will set at 10:51 this evening.  Tomorrow the sun will rise at 6:01.  |  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 20 minutes Sunday to 15 hours and 33 minutes on the 21st, retreating back to 15 hours 30 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 6:52 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 last much longer than average because the sun sets at a shallow angle. On the 21st there’s only 3 ½ hours of total darkness, starting after midnight.

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


June Star Chart

June star chart for 11 p.m. on June 15, 2014. Created by my LookingUp program.

Astronomical twilight ends about midnight in June.

Add a half hour to every week before the 15th and subtract and hour for every week after the 15th.

For a list of constellation names to go with the abbreviations click here.

Also shown is the Summer Triangle in red. Clockwise from the top star is Deneb in Cygnus, Vega in  Lyra and Altair in Aquila.

The green pointers from the Big Dipper are:

  • Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
  • The leaky bowl drips on the back of Leo the lion.
  • The arc of the dipper’s handle points to Arcturus.
  • The straighten the ark to a spike to point to Spica.
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