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The waning moon.

At 15:27:46 UT Tuesday 19 November 2019
the waning moon’s phase is

52.64% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 15.4794444444444 in decimal hours.
The Julian date is 2458807.02638521.
The sun’s ecliptic longitude is 237.040219038072 degrees.
Its mean anomaly is 315.6114956888 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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