Solar Eclipse Computer

U.S. Naval Observatory
Astronomical Applications Department

Solar Eclipse of 2017 Aug. 21

Sun in Partial Eclipse at this Location

Boise, Idaho (Longitude W 116° 13' 12.0", Latitude N 43° 36' 36.0", Height 0m)

August 21, 2017   Universal Time (UT1)Delta T: 69.4s
PhenomenonDayTime (UT1)Sun's Altitude (°)Sun's Azimuth (°)Position Angle (°)Vertex Angle (°)
Eclipse Begins2116:10:34.233.7107.1286.9331.9
Maximum Eclipse2117:27:12.346.1125.5
Eclipse Ends2118:50:04.455.9154.2107.6126.5


Duration2h 39m 30.3s
Magnitude0.994
Obscuration99.6%

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