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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:25 AM MST 12:23 PM MST 5:22 PM MST
Civil Twilight 6:57 AM MST   5:50 PM MST
Nautical Twilight 6:26 AM MST   6:21 PM MST
Astronomical Twilight 5:56 AM MST   6:51 PM MST
Altitude -0.8° 33.4° -0.8°
Azimuth 117.5° 180.0° 242.4°
Hour Angle of the Sun 74.7° 74.7° -74.7°
Mean Anomaly of the Sun 339.22° 339.43° 339.63°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.96° -98.73° -98.50°
Sun Declination -23.18° -23.19° -23.20°
Moon 3:08 AM MST (12/13)   2:50 PM MST (12/13)
Length of Visible Light 10h 52m
Length of Day
9h 57m
Waning Crescent, 15% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter