Home > Asterism, Constellations, Ephemeris Program, Mythology > 09/07/2015 – Ephemeris – Small summer constellations

09/07/2015 – Ephemeris – Small summer constellations

September 7, 2015

Ephemeris for Labor Day*, Monday, September 7th.  The Sun will rise at 7:11.  It’ll be up for 12 hours and 56 minutes, setting at 8:08.   The Moon, 2 days past last quarter, will rise at 2:47 tomorrow morning.

Located below the eastern edge of the Summer Triangle of three of the brightest stars in the sky, which is  overhead in our sky at 10 p.m., is the tiny constellation of Delphinus the dolphin. Delphinus’ 6 stars in a small parallelogram with a tail, really does look like a dolphin leaping out of the water. The parallelogram itself has the name Job’s Coffin. The origin of this asterism or informal constellation is unknown. Of the dolphin itself: the ancient Greeks told stories of dolphins rescuing shipwrecked sailors. There’s another tiny constellation to the right of Delphinus, Sagitta the arrow a small thin group of 5 stars, which represents Cupid’s dart.  Behind Sagitta binoculars will find a little star group called the Coat hanger.

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


The Summer Triangle July 5, 2012 at 11 p.m. Created using Stellaruim and The Gimp.

The Summer Triangle. Created using Stellarium and The Gimp.

Delphinus, Sagitta and the Coat hanger. Diagram created using Stellarium.

Delphinus, Sagitta and the Coat hanger. Diagram created using Stellarium.

* In the US Labor Day is celebrated on the first Monday in September and is considered the unofficial end of summer.  The weather generally agrees.  Last week we had a preview of fall weather.  This week, except for today has been hot.  The outlook for next week is looking decidedly cooler.  Most schools in Michigan start the day after Labor Day. and end after June 1st.  The unofficial start of summer is Memorial day, the last Monday in May.

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