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Astronomy

Dec. 12, 2017 Rise Solar Noon Set
Actual Time 7:35 AM MST 12:15 PM MST 4:55 PM MST
Civil Twilight 7:05 AM MST   5:26 PM MST
Nautical Twilight 6:30 AM MST   6:00 PM MST
Astronomical Twilight 5:57 AM MST   6:33 PM MST
Altitude -0.8° 26.5° -0.8°
Azimuth 120.2° 180.0° 239.8°
Hour Angle of the Sun 70.0° 70.0° -69.9°
Mean Anomaly of the Sun 338.25° 338.44° 338.63°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -100.06° -99.84° -99.63°
Sun Declination -23.11° -23.13° -23.14°
Moon 2:05 AM MST   2:06 PM MST
Length of Visible Light 10h 21m
Length of Day
9h 19m
Waning Crescent, 25% of the Moon is Illuminated
Dec 12
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter