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The waning moon.

At 15:26:07 UT Thursday 20 October 2016
the waning moon’s phase was

73.36% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 15.4519444444444 in decimal hours.
The Julian date was 2457682.23359495.
The sun’s ecliptic longitude was 207.691670028277 degrees.
Its mean anomaly was 286.75709036619 degrees.
The moon’s true longitude was 89.8396314372316 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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