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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:20 AM PST 12:06 PM PST 4:51 PM PST
Civil Twilight 6:51 AM PST   5:21 PM PST
Nautical Twilight 6:17 AM PST   5:54 PM PST
Astronomical Twilight 5:45 AM PST   6:26 PM PST
Altitude -0.8° 28.4° -0.8°
Azimuth 119.4° 180.0° 240.6°
Hour Angle of the Sun 71.4° 71.4° -71.3°
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 2:56 AM PST   2:29 PM PST
Length of Visible Light 10h 30m
Length of Day
9h 31m
Waning Crescent, 20% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter