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The waning moon.

At 07:58:00 UT Friday 23 June 2017
the waning moon’s phase is

0.95% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 7.98333333333334 in decimal hours.
The Julian date is 2457927.50953324.
The sun’s ecliptic longitude is 92.056104914099 degrees.
Its mean anomaly is 168.9196143374 degrees.
The moon’s true longitude is 80.8497232033734 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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