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The waning moon.

At 22:55:10 UT Saturday 23 July 2016
the waning moon’s phase is

81.67% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 22.9361111111111 in decimal hours.
The Julian date is 2457593.31670977.
The sun’s ecliptic longitude is 121.475951497054 degrees.
Its mean anomaly is 199.34184019319 degrees.
The moon’s true longitude is 352.173084608767 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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