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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 6:38 AM PST 11:39 AM PST 4:40 PM PST
Civil Twilight 6:11 AM PST   5:07 PM PST
Nautical Twilight 5:40 AM PST   5:37 PM PST
Astronomical Twilight 5:10 AM PST   6:07 PM PST
Altitude -0.8° 34.2° -0.8°
Azimuth 117.3° 180.0° 242.7°
Hour Angle of the Sun 75.2° 75.2° -75.2°
Mean Anomaly of the Sun 339.23° 339.44° 339.64°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.95° -98.72° -98.49°
Sun Declination -23.18° -23.19° -23.21°
Moon 2:23 AM PST   2:06 PM PST
Length of Visible Light 10h 56m
Length of Day
10h 01m
Waning Crescent, 18% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter