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The waxing moon.

At 13:22:40 UT Saturday 10 December 2016
the waxing moon’s phase is

83.26% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 13.3944444444444 in decimal hours.
The Julian date is 2457733.33256648.
The sun’s ecliptic longitude is 258.958885887664 degrees.
Its mean anomaly is 336.94060681541 degrees.
The moon’s true longitude is 30.6514165364154 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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