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The full moon.

At 12:55:23 UT Sunday 09 February 2020
the moon was

FULL

 

Some factors that go into this equation:

Universal Time is 12.9397222222222 in decimal hours.
The Julian date was 2458889.4992293.
The sun’s ecliptic longitude was 320.233318543227 degrees.
Its mean anomaly was 36.3302759752 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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