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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 6:45 AM PST 11:41 AM PST 4:38 PM PST
Civil Twilight 6:17 AM PST   5:06 PM PST
Nautical Twilight 5:45 AM PST   5:37 PM PST
Astronomical Twilight 5:15 AM PST   6:08 PM PST
Altitude -0.8° 32.5° -0.8°
Azimuth 117.8° 180.0° 242.2°
Hour Angle of the Sun 74.2° 74.2° -74.2°
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 2:27 AM PST   2:07 PM PST
Length of Visible Light 10h 49m
Length of Day
9h 53m
Waning Crescent, 19% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter