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Astronomy

Dec. 12, 2017 Rise Solar Noon Set
Actual Time 7:40 AM PST 11:52 AM PST 4:03 PM PST
Civil Twilight 7:04 AM PST   4:40 PM PST
Nautical Twilight 6:24 AM PST   5:20 PM PST
Astronomical Twilight 5:46 AM PST   5:58 PM PST
Altitude -0.8° 18.5° -0.8°
Azimuth 125.1° 180.0° 234.9°
Hour Angle of the Sun 62.8° 62.8° -62.8°
Mean Anomaly of the Sun 338.29° 338.46° 338.63°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -100.01° -99.81° -99.62°
Sun Declination -23.12° -23.13° -23.14°
Moon 1:45 AM PST   1:38 PM PST
Length of Visible Light 9h 36m
Length of Day
8h 22m
Waning Crescent, 25% of the Moon is Illuminated
Dec 12
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter