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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:40 AM MST 12:04 PM MST 4:28 PM MST
Civil Twilight 7:07 AM MST   5:02 PM MST
Nautical Twilight 6:29 AM MST   5:39 PM MST
Astronomical Twilight 5:54 AM MST   6:15 PM MST
Altitude -0.8° 21.7° -0.8°
Azimuth 123.0° 180.0° 237.0°
Hour Angle of the Sun 65.9° 65.9° -65.9°
Mean Anomaly of the Sun 341.21° 341.39° 341.57°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.74° -96.53° -96.33°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:58 AM MST   3:17 PM MST
Length of Visible Light 9h 55m
Length of Day
8h 47m
Waning Crescent, 8% of the Moon is Illuminated
Dec 15
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter