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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:36 AM PST 12:11 PM PST 4:46 PM PST
Civil Twilight 7:04 AM PST   5:18 PM PST
Nautical Twilight 6:29 AM PST   5:53 PM PST
Astronomical Twilight 5:55 AM PST   6:27 PM PST
Altitude -0.8° 25.0° -0.8°
Azimuth 121.0° 180.0° 239.0°
Hour Angle of the Sun 68.8° 68.8° -68.8°
Mean Anomaly of the Sun 339.27° 339.46° 339.65°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.91° -98.69° -98.48°
Sun Declination -23.18° -23.19° -23.21°
Moon 3:04 AM PST   2:30 PM PST
Length of Visible Light 10h 13m
Length of Day
9h 10m
Waning Crescent, 19% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter