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Astronomy

Dec. 13, 2017 Rise Solar Noon Set
Actual Time 7:11 AM MST 11:53 AM MST 4:35 PM MST
Civil Twilight 6:41 AM MST   5:05 PM MST
Nautical Twilight 6:07 AM MST   5:39 PM MST
Astronomical Twilight 5:34 AM MST   6:12 PM MST
Altitude -0.8° 27.2° -0.8°
Azimuth 119.9° 180.0° 240.0°
Hour Angle of the Sun 70.5° 70.5° -70.5°
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° -98.75° -98.54°
Sun Declination -23.18° -23.19° -23.20°
Moon 2:41 AM MST (12/13)   2:13 PM MST (12/13)
Length of Visible Light 10h 24m
Length of Day
9h 24m
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