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The waning moon.

At 20:14:31 UT Saturday 24 September 2016
the waning moon’s phase is

34.69% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 20.2586111111111 in decimal hours.
The Julian date is 2457655.84686558.
The sun’s ecliptic longitude is 182.202812151518 degrees.
Its mean anomaly is 261.32766236235 degrees.
The moon’s true longitude is 110.037329753797 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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