Solar Eclipse Computer

U.S. Naval Observatory
Astronomical Applications Department

Solar Eclipse of 2017 Aug. 21

Sun in Partial Eclipse at this Location

Philadelphia Area (Longitude W 75° 0' 0.0", Latitude N 40° 0' 0.0", Height 10m)

August 21, 2017   Universal Time (UT1)Delta T: 69.4s
PhenomenonDayTime (UT1)Sun's Altitude (°)Sun's Azimuth (°)Position Angle (°)Vertex Angle (°)
Eclipse Begins2117:21:33.461.6189.6281.3273.9
Maximum Eclipse2118:44:28.654.0225.6
Eclipse Ends2120:01:20.341.7247.1126.180.1


Duration2h 39m 47.0s
Magnitude0.797
Obscuration75.0%

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