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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:43 AM PST 12:04 PM PST 4:25 PM PST
Civil Twilight 7:08 AM PST   4:59 PM PST
Nautical Twilight 6:31 AM PST   5:37 PM PST
Astronomical Twilight 5:54 AM PST   6:13 PM PST
Altitude -0.8° 20.9° -0.8°
Azimuth 123.4° 180.0° 236.6°
Hour Angle of the Sun 65.3° 65.2° -65.2°
Mean Anomaly of the Sun 339.28° 339.46° 339.63°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.90° -98.70° -98.50°
Sun Declination -23.18° -23.19° -23.21°
Moon 3:00 AM PST   2:19 PM PST
Length of Visible Light 9h 50m
Length of Day
8h 42m
Waning Crescent, 20% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter