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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 6:56 AM MST 11:43 AM MST 4:29 PM MST
Civil Twilight 6:27 AM MST   4:59 PM MST
Nautical Twilight 5:54 AM MST   5:32 PM MST
Astronomical Twilight 5:21 AM MST   6:04 PM MST
Altitude -0.8° 28.7° -0.8°
Azimuth 119.3° 180.0° 240.7°
Hour Angle of the Sun 71.6° 71.6° -71.6°
Mean Anomaly of the Sun 339.20° 339.40° 339.60°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.98° -98.76° -98.54°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:29 AM MST   2:04 PM MST
Length of Visible Light 10h 32m
Length of Day
9h 32m
Waning Crescent, 18% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter