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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:18 AM MST 11:51 AM MST 4:25 PM MST
Civil Twilight 6:46 AM MST   4:57 PM MST
Nautical Twilight 6:11 AM MST   5:32 PM MST
Astronomical Twilight 5:37 AM MST   6:06 PM MST
Altitude -0.8° 24.6° -0.8°
Azimuth 121.3° 180.0° 238.7°
Hour Angle of the Sun 68.5° 68.5° -68.4°
Mean Anomaly of the Sun 341.19° 341.38° 341.57°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.75° -96.54° -96.33°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:39 AM MST   3:11 PM MST
Length of Visible Light 10h 11m
Length of Day
9h 07m
Waning Crescent, 7% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter