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The waning moon.

At 00:01:27 UT Monday 21 August 2017
the waning moon’s phase will be

0.79% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 0.0408333333333334 in decimal hours.
The Julian date will be 2457986.50788509.
The sun’s ecliptic longitude will be 148.12016673211 degrees.
Its mean anomaly will be 226.74662069221 degrees.
The moon’s true longitude will be 137.931243512472 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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