Bob Moler's Ephemeris Blog

Ephemeris for Labor Day, Monday, September 3rd.  The sun will rise at 7:07.  It’ll be up for 13 hours and 6 minutes, setting at 8:14.   The moon, 3 days past full, will rise at 9:21 this evening.

Last Friday’s full moon wasn’t the Harvest Moon.  That honor is reserved for the closest full moon to the autumnal equinox, which will occur on the 29th.  Still we have the same effect of taking quite a few days for the waning gibbous moon to clear the evening twilight.  So tonight the moon, some three days past full still rises within an hour and a half of sunset.  In the spring the day after full, the moon will rise an hour and a half after sunset.  The reason for the slow advance of rise times is that the moon’s path at this time is at a low angle to the eastern horizon, so the moon moves more horizontally than vertically with respect to the horizon each night.  On average the moon moves about 26 times its diameter each day in its orbit of the earth.

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

Addendum

Almost the Harvest Moon Effect over 4 nights. Created using Cartes du Ciel (Sky Charts)

The shallow path of the moon rising from night to night allows the moon to rise much less than the 50 minutes average night to night moonrise interval.