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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:56 AM MST 12:29 PM MST 5:02 PM MST
Civil Twilight 7:24 AM MST   5:34 PM MST
Nautical Twilight 6:49 AM MST   6:09 PM MST
Astronomical Twilight 6:14 AM MST   6:43 PM MST
Altitude -0.8° 24.2° -0.8°
Azimuth 121.4° 180.0° 238.5°
Hour Angle of the Sun 68.1° 68.1° -68.1°
Mean Anomaly of the Sun 339.25° 339.43° 339.62°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.94° -98.73° -98.52°
Sun Declination -23.18° -23.19° -23.20°
Moon 3:21 AM MST (12/13)   2:47 PM MST (12/13)
Length of Visible Light 10h 09m
Length of Day
9h 05m
Waning Crescent, 14% of the Moon is Illuminated
Dec 14
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter