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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:40 AM MST 12:21 PM MST 5:01 PM MST
Civil Twilight 7:09 AM MST   5:32 PM MST
Nautical Twilight 6:35 AM MST   6:06 PM MST
Astronomical Twilight 6:02 AM MST   6:39 PM MST
Altitude -0.8° 26.8° -0.8°
Azimuth 120.1° 180.0° 239.8°
Hour Angle of the Sun 70.2° 70.2° -70.2°
Mean Anomaly of the Sun 339.23° 339.43° 339.62°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.95° -98.73° -98.52°
Sun Declination -23.18° -23.19° -23.20°
Moon 3:10 AM MST   2:41 PM MST
Length of Visible Light 10h 22m
Length of Day
9h 21m
Waning Crescent, 21% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter