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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:14 AM MST 12:00 PM MST 4:45 PM MST
Civil Twilight 6:44 AM MST   5:15 PM MST
Nautical Twilight 6:11 AM MST   5:48 PM MST
Astronomical Twilight 5:39 AM MST   6:20 PM MST
Altitude -0.8° 28.4° -0.8°
Azimuth 119.5° 180.0° 240.5°
Hour Angle of the Sun 71.4° 71.3° -71.3°
Mean Anomaly of the Sun 341.19° 341.38° 341.58°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.76° -96.54° -96.32°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:41 AM MST   3:26 PM MST
Length of Visible Light 10h 30m
Length of Day
9h 30m
Waning Crescent, 6% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter