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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:15 AM MST 12:09 PM MST 5:02 PM MST
Civil Twilight 6:47 AM MST   5:30 PM MST
Nautical Twilight 6:15 AM MST   6:02 PM MST
Astronomical Twilight 5:44 AM MST   6:33 PM MST
Altitude -0.8° 31.2° -0.8°
Azimuth 118.4° 180.0° 241.6°
Hour Angle of the Sun 73.3° 73.3° -73.3°
Mean Anomaly of the Sun 341.19° 341.39° 341.59°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.76° -96.53° -96.31°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:46 AM MST   3:41 PM MST
Length of Visible Light 10h 43m
Length of Day
9h 46m
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