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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 6:52 AM PST 11:49 AM PST 4:46 PM PST
Civil Twilight 6:24 AM PST   5:13 PM PST
Nautical Twilight 5:53 AM PST   5:45 PM PST
Astronomical Twilight 5:22 AM PST   6:15 PM PST
Altitude -0.8° 32.6° -0.8°
Azimuth 117.9° 180.0° 242.1°
Hour Angle of the Sun 74.2° 74.2° -74.2°
Mean Anomaly of the Sun 341.21° 341.42° 341.62°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.73° -96.50° -96.27°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:25 AM PST (12/15)   3:24 PM PST (12/15)
Length of Visible Light 10h 49m
Length of Day
9h 53m
Waning Crescent, 4% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter