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The waning moon.

At 16:02:33 UT Friday 21 October 2016
the waning moon’s phase is

62.53% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 16.0591666666667 in decimal hours.
The Julian date is 2457683.12530327.
The sun’s ecliptic longitude is 208.712279140609 degrees.
Its mean anomaly is 287.76767551332 degrees.
The moon’s true longitude is 104.198873780415 degrees.

These calculations incorporate the switch to the English New Style (N.S.)—i.e., Gregorian— calendar after Wednesday, 02 September 1752; the next day became Thursday, 14 September, skipping eleven days. (Please also note that, while fairly accurate, these calculations remain a bit buggy.)

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