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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:15 AM MST 11:55 AM MST 4:36 PM MST
Civil Twilight 6:44 AM MST   5:06 PM MST
Nautical Twilight 6:10 AM MST   5:40 PM MST
Astronomical Twilight 5:37 AM MST   6:13 PM MST
Altitude -0.8° 26.7° -0.8°
Azimuth 120.3° 180.0° 239.7°
Hour Angle of the Sun 70.1° 70.1° -70.1°
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° -96.54° -96.33°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:39 AM MST (12/15)   3:19 PM MST (12/15)
Length of Visible Light 10h 21m
Length of Day
9h 20m
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