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Astronomy

Dec. 17, 2017 Rise Solar Noon Set
Actual Time 8:13 AM MST 12:40 PM MST 5:06 PM MST
Civil Twilight 7:40 AM MST   5:40 PM MST
Nautical Twilight 7:03 AM MST   6:16 PM MST
Astronomical Twilight 6:28 AM MST   6:51 PM MST
Altitude -0.8° 22.5° -0.8°
Azimuth 122.6° 180.0° 237.4°
Hour Angle of the Sun 66.6° 66.6° -66.6°
Mean Anomaly of the Sun 343.20° 343.38° 343.56°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -94.50° -94.29° -94.09°
Sun Declination -23.37° -23.38° -23.38°
Moon 7:27 AM MST   5:09 PM MST
Length of Visible Light 9h 59m
Length of Day
8h 53m
Waning Crescent, 1% of the Moon is Illuminated
Dec 17
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter