Home > Ephemeris Program, Seasons > 06/14/2013 – Ephemeris – Earliest sun rise of the year

06/14/2013 – Ephemeris – Earliest sun rise of the year

June 14, 2013

Ephemeris for Flag Day, Friday, June 14th.  Today the sun will be up for 15 hours and 32 minutes, setting at 9:29.   The moon, 2 days before first quarter, will set at 12:51 tomorrow morning.  Tomorrow the sun will rise at 5:56.

The sundial makes a poor clock.  It will give the approximate time, but even if you could make the lines on its face accurate for one day, it could be off a week later.  The reason I mention this is because tomorrow morning is the earliest sunrise.  We’ll be still 6 days from the longest day, when the daylight hours are at their maximum.  The latest sunset will be on the 26th, 5 days after the summer solstice.  The disparity is even greater in the winter.  Sundials can be corrected by a table of how much the sun is fast or slow, called the equation of time.  It is caused by both earth’s slightly eccentric orbit of the sun, and the tilt of the earth’s axis.  It seems when you study things closely they are not as simple as they appear.

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



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