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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 6:51 AM PST 11:43 AM PST 4:36 PM PST
Civil Twilight 6:22 AM PST   5:05 PM PST
Nautical Twilight 5:50 AM PST   5:37 PM PST
Astronomical Twilight 5:19 AM PST   6:08 PM PST
Altitude -0.8° 31.1° -0.8°
Azimuth 118.3° 180.0° 241.6°
Hour Angle of the Sun 73.2° 73.2° -73.2°
Mean Anomaly of the Sun 339.24° 339.44° 339.64°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.94° -98.72° -98.49°
Sun Declination -23.18° -23.19° -23.21°
Moon 2:30 AM PST (12/13)   2:08 PM PST (12/13)
Length of Visible Light 10h 42m
Length of Day
9h 45m
Waning Crescent, 15% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter