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The waning moon.

At 16:37:48 UT Tuesday 02 January 2018
the waning moon’s phase will be

99.48% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 16.6466666666667 in decimal hours.
The Julian date will be 2458121.49478437.
The sun’s ecliptic longitude will be 282.25723331856 degrees.
Its mean anomaly will be -0.49465456339999 degrees.
The moon’s true longitude will be 1910.54014583483 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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