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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:13 AM MST 11:50 AM MST 4:26 PM MST
Civil Twilight 6:42 AM MST   4:58 PM MST
Nautical Twilight 6:07 AM MST   5:32 PM MST
Astronomical Twilight 5:33 AM MST   6:06 PM MST
Altitude -0.8° 25.5° -0.8°
Azimuth 120.8° 180.0° 239.1°
Hour Angle of the Sun 69.2° 69.2° -69.1°
Mean Anomaly of the Sun 341.19° 341.38° 341.57°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.76° -96.55° -96.33°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:35 AM MST (12/15)   3:11 PM MST (12/15)
Length of Visible Light 10h 15m
Length of Day
9h 13m
Waning Crescent, 5% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter