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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:13 AM MST 11:54 AM MST 4:36 PM MST
Civil Twilight 6:42 AM MST   5:06 PM MST
Nautical Twilight 6:09 AM MST   5:40 PM MST
Astronomical Twilight 5:36 AM MST   6:13 PM MST
Altitude -0.8° 27.0° -0.8°
Azimuth 120.0° 180.0° 239.9°
Hour Angle of the Sun 70.3° 70.3° -70.3°
Mean Anomaly of the Sun 339.22° 339.41° 339.60°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -98.97° -98.75° -98.54°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:42 AM MST   2:14 PM MST
Length of Visible Light 10h 23m
Length of Day
9h 22m
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