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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:42 AM PST 11:58 AM PST 4:13 PM PST
Civil Twilight 7:06 AM PST   4:49 PM PST
Nautical Twilight 6:27 AM PST   5:28 PM PST
Astronomical Twilight 5:50 AM PST   6:05 PM PST
Altitude -0.8° 19.6° -0.8°
Azimuth 124.3° 180.0° 235.7°
Hour Angle of the Sun 64.0° 63.9° -63.9°
Mean Anomaly of the Sun 339.28° 339.45° 339.63°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.90° -98.70° -98.51°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:55 AM PST   2:10 PM PST
Length of Visible Light 9h 42m
Length of Day
8h 31m
Waning Crescent, 17% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter