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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:15 AM PST 12:02 PM PST 4:48 PM PST
Civil Twilight 6:45 AM PST   5:18 PM PST
Nautical Twilight 6:12 AM PST   5:51 PM PST
Astronomical Twilight 5:40 AM PST   6:23 PM PST
Altitude -0.8° 28.8° -0.8°
Azimuth 119.2° 180.0° 240.7°
Hour Angle of the Sun 71.7° 71.7° -71.6°
Mean Anomaly of the Sun 339.26° 339.45° 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 2:51 AM PST   2:25 PM PST
Length of Visible Light 10h 32m
Length of Day
9h 33m
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