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The waxing moon.

At 13:56:01 UT Tuesday 20 October 2020
the moon’s phase is

WAXING CRESCENT (19.52% full)

 


Some factors that go into this equation:

Universal Time is 13.9502777777778 in decimal hours.
The Julian date is 2459142.6952059.
The sun’s ecliptic longitude is 207.660488934996 degrees.
Its mean anomaly is 286.7262066395 degrees.
The moon’s mean longitude is 318.351648 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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