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Astronomy

Sep. 20, 2017 Rise Solar Noon Set
Actual Time 7:01 AM MDT 1:10 PM MDT 7:17 PM MDT
Civil Twilight 6:32 AM MDT   7:47 PM MDT
Nautical Twilight 5:57 AM MDT   8:21 PM MDT
Astronomical Twilight 5:21 AM MDT   8:57 PM MDT
Altitude -0.8° 45.4° -0.8°
Azimuth 87.9° 180.0° 271.8°
Hour Angle of the Sun 92.1° 92.0° -91.9°
Mean Anomaly of the Sun 256.38° 256.63° 256.88°
Obliquity 23.43° 23.43° 23.43°
Right Ascension of the Sun 177.94° 178.17° 178.40°
Sun Declination 0.89° 0.79° 0.69°
Moon 7:21 AM MDT (9/20)   7:53 PM MDT (9/20)
Length of Visible Light 13h 14m
Length of Day
12h 15m
New Moon, 1% of the Moon is Illuminated
Sep 20
New Moon
Sep 27
First Quarter
Oct 5
Full
Oct 12
Last Quarter
Oct 19
New