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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:34 AM MST 12:00 PM MST 4:25 PM MST
Civil Twilight 7:01 AM MST   4:59 PM MST
Nautical Twilight 6:24 AM MST   5:35 PM MST
Astronomical Twilight 5:48 AM MST   6:11 PM MST
Altitude -0.8° 22.1° -0.8°
Azimuth 122.6° 180.0° 237.3°
Hour Angle of the Sun 66.4° 66.3° -66.3°
Mean Anomaly of the Sun 339.23° 339.41° 339.59°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.95° -98.75° -98.55°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:52 AM MST   2:14 PM MST
Length of Visible Light 9h 57m
Length of Day
8h 50m
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