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Astronomy

Dec. 15, 2017 Rise Solar Noon Set
Actual Time 7:25 AM MST 12:08 PM MST 4:50 PM MST
Civil Twilight 6:55 AM MST   5:20 PM MST
Nautical Twilight 6:21 AM MST   5:54 PM MST
Astronomical Twilight 5:49 AM MST   6:27 PM MST
Altitude -0.8° 27.4° -0.8°
Azimuth 120.0° 180.0° 240.0°
Hour Angle of the Sun 70.6° 70.6° -70.6°
Mean Anomaly of the Sun 341.20° 341.39° 341.58°
Obliquity 23.44° 23.44° 23.44°
Right Ascension of the Sun -96.75° -96.53° -96.31°
Sun Declination -23.29° -23.30° -23.31°
Moon 4:51 AM MST (12/15)   3:33 PM MST (12/15)
Length of Visible Light 10h 25m
Length of Day
9h 24m
Waning Crescent, 4% of the Moon is Illuminated
Dec 16
Waning Crescent
Dec 18
New
Dec 26
First Quarter
Jan 1
Full
Jan 8
Last Quarter