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The waning moon.

At 19:23:54 UT Monday 30 April 2018
the waning moon’s phase was

99.36% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 19.415 in decimal hours.
The Julian date was 2458239.49363325.
The sun’s ecliptic longitude was 40.41628065901 degrees.
Its mean anomaly was 115.9254251748 degrees.
The moon’s true longitude was 3469.56944087558 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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