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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:05 AM MST 11:51 AM MST 4:36 PM MST
Civil Twilight 6:35 AM MST   5:06 PM MST
Nautical Twilight 6:02 AM MST   5:39 PM MST
Astronomical Twilight 5:30 AM MST   6:11 PM MST
Altitude -0.8° 28.3° -0.8°
Azimuth 119.4° 180.0° 240.6°
Hour Angle of the Sun 71.3° 71.3° -71.3°
Mean Anomaly of the Sun 339.21° 339.41° 339.60°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.97° -98.76° -98.54°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:37 AM MST (12/13)   2:12 PM MST (12/13)
Length of Visible Light 10h 30m
Length of Day
9h 30m
Waning Crescent, 15% of the Moon is Illuminated
Dec 13
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter