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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:46 AM MST 12:08 PM MST 4:29 PM MST
Civil Twilight 7:12 AM MST   5:04 PM MST
Nautical Twilight 6:34 AM MST   5:41 PM MST
Astronomical Twilight 5:58 AM MST   6:18 PM MST
Altitude -0.8° 21.0° -0.8°
Azimuth 123.3° 180.0° 236.6°
Hour Angle of the Sun 65.4° 65.3° -65.3°
Mean Anomaly of the Sun 339.24° 339.42° 339.60°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.94° -98.74° -98.54°
Sun Declination -23.18° -23.19° -23.20°
Moon 3:01 AM MST   2:22 PM MST
Length of Visible Light 9h 51m
Length of Day
8h 42m
Waning Crescent, 18% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter