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The waxing moon.

At 11:40:53 UT Thursday 21 September 2017
the waxing moon’s phase is

1.83% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 11.6980555555556 in decimal hours.
The Julian date is 2458017.51829251.
The sun’s ecliptic longitude is 178.677078960213 degrees.
Its mean anomaly is 257.78043500129 degrees.
The moon’s true longitude is 554.223203100104 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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