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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:18 AM PST 11:40 AM PST 4:03 PM PST
Civil Twilight 6:44 AM PST   4:37 PM PST
Nautical Twilight 6:06 AM PST   5:14 PM PST
Astronomical Twilight 5:30 AM PST   5:50 PM PST
Altitude -0.8° 21.4° -0.8°
Azimuth 123.2° 180.0° 236.8°
Hour Angle of the Sun 65.7° 65.6° -65.6°
Mean Anomaly of the Sun 341.23° 341.41° 341.59°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.71° -96.51° -96.30°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:36 AM PST   2:54 PM PST
Length of Visible Light 9h 53m
Length of Day
8h 45m
Waning Crescent, 8% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter