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The waning moon.

At 00:01:57 UT Sunday 26 May 2019
the waning moon’s phase is

56.50% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 0.0491666666666666 in decimal hours.
The Julian date is 2458630.06495029.
The sun’s ecliptic longitude is 64.504362311246 degrees.
Its mean anomaly is 140.5182130874 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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