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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:16 AM PST 12:03 PM PST 4:50 PM PST
Civil Twilight 6:46 AM PST   5:19 PM PST
Nautical Twilight 6:14 AM PST   5:52 PM PST
Astronomical Twilight 5:42 AM PST   6:24 PM PST
Altitude -0.8° 28.9° -0.8°
Azimuth 119.2° 180.0° 240.8°
Hour Angle of the Sun 71.8° 71.8° -71.7°
Mean Anomaly of the Sun 339.26° 339.46° 339.65°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.92° -98.70° -98.48°
Sun Declination -23.18° -23.19° -23.21°
Moon 2:52 AM PST (12/13)   2:26 PM PST (12/13)
Length of Visible Light 10h 32m
Length of Day
9h 34m
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