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Astronomy

Dec. 17, 2017 Rise Solar Noon Set
Actual Time 7:18 AM PST 12:01 PM PST 4:43 PM PST
Civil Twilight 6:48 AM PST   5:13 PM PST
Nautical Twilight 6:14 AM PST   5:47 PM PST
Astronomical Twilight 5:42 AM PST   6:20 PM PST
Altitude -0.8° 27.4° -0.8°
Azimuth 120.0° 180.0° 240.0°
Hour Angle of the Sun 70.6° 70.6° -70.6°
Mean Anomaly of the Sun 343.20° 343.40° 343.59°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -94.49° -94.28° -94.06°
Sun Declination -23.37° -23.38° -23.38°
Moon 6:35 AM PST   4:44 PM PST
Length of Visible Light 10h 25m
Length of Day
9h 24m
Waning Crescent, 1% of the Moon is Illuminated
Dec 17
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter