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The waning moon.

At 20:40:24 UT Monday 30 April 2018
the waning moon’s phase will be

99.27% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 20.69 in decimal hours.
The Julian date will be 2458239.49273923.
The sun’s ecliptic longitude will be 40.467877236145 degrees.
Its mean anomaly will be 115.9777876906 degrees.
The moon’s true longitude will be 3470.24404580244 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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