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The waxing moon.

At 01:09:35 UT Sunday 13 October 2019
the moon’s phase was

WAXING GIBBOUS (99.34% full)


Some factors that go into this equation:

Universal Time is 1.17638888888889 in decimal hours.
The Julian date was 2458770.49341972.
The sun’s ecliptic longitude was 199.429699550877 degrees.
Its mean anomaly was 278.555136465 degrees.
The moon’s mean longitude was 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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