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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 6:43 AM PST 11:35 AM PST 4:27 PM PST
Civil Twilight 6:15 AM PST   4:56 PM PST
Nautical Twilight 5:43 AM PST   5:28 PM PST
Astronomical Twilight 5:12 AM PST   5:59 PM PST
Altitude -0.8° 30.7° -0.8°
Azimuth 118.6° 180.0° 241.4°
Hour Angle of the Sun 73.0° 72.9° -72.9°
Mean Anomaly of the Sun 341.21° 341.41° 341.61°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.73° -96.51° -96.29°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:14 AM PST   3:07 PM PST
Length of Visible Light 10h 40m
Length of Day
9h 43m
Waning Crescent, 7% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter