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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 6:37 AM PST 11:37 AM PST 4:37 PM PST
Civil Twilight 6:10 AM PST   5:05 PM PST
Nautical Twilight 5:39 AM PST   5:35 PM PST
Astronomical Twilight 5:09 AM PST   6:05 PM PST
Altitude -0.8° 33.9° -0.8°
Azimuth 117.5° 180.0° 242.5°
Hour Angle of the Sun 75.0° 75.0° -75.0°
Mean Anomaly of the Sun 341.20° 341.41° 341.61°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.74° -96.51° -96.28°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:11 AM PST   3:14 PM PST
Length of Visible Light 10h 54m
Length of Day
10h 00m
Waning Crescent, 5% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter