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The waning moon.

At 21:55:18 UT Saturday 24 September 2016
the waning moon’s phase is

33.97% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 21.9383333333333 in decimal hours.
The Julian date is 2457655.83968189.
The sun’s ecliptic longitude is 182.271449745802 degrees.
Its mean anomaly is 261.39664626933 degrees.
The moon’s true longitude is 110.972855529061 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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