Bob Moler's Ephemeris Blog

Ephemeris for Monday, June 27th.  Today the Sun will be up for 15 hours and 33 minutes, setting at 9:32, and it will rise tomorrow at 5:59.  The Moon, at last quarter today, will rise at 1:57 tomorrow morning.

Here we are a week into summer and we find that the latest sunset was already last night.  That means that the last vestiges of twilight* don’t end until just after midnight.  It wouldn’t be so bad if the Sun was in the south at noon instead of 1:43 in the afternoon, due to being in the extreme western part of the eastern time zone and the imposition of daylight time.  For latitudes north of 48 ½ degrees, twilight currently doesn’t end.  That latitude will move northward as the Sun heads south.  As it is now we in the Grand Traverse region are currently getting only 4 ½ hours of darkness Moon willing.  And it won’t for the next few days at least.  Our darkness situation will start to get better in about a month from now.

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

*Astronomical twilight begins and ends when the Sun is 18° below the horizon.