![]() Upath17 and w_upath17 contain the path of totality. Penum17_1m contains a time sequence of penumbra outlines at 1-minute intervals from 17:00 to 19:15 UTC, for 95% to 75% obscuration in 5% steps. Penum17 contains the contours for maximum obscuration at 90%, 75%, 50%, 25% and the penumbra edge at 0%. The lunar limb profile and eclipse calculations are by the visualizer.Įclipse2017_shapefiles.zip contains the following nine shapefiles: Planetary positions are from the JPL DE421 ephemeris. Lunar topography, used for precise shadow calculations, is from NASA LRO laser altimetry and JAXA Kaguya stereo imaging. Elevations are from SRTM, a radar instrument flown on Space Shuttle Endeavour during the STS-99 mission. ![]() The land color is based on Blue Marble Next Generation, a global mosaic of MODIS images assembled by NASA's Earth Observatory. The map uses a number of NASA data products. To read about the reason the shapes aren't smooth ovals, go here. ![]() The umbra is shown at 10-minute intervals. Features include state boundaries, major highways, and 833 place names. This map of the United States shows the path of the Moon's umbral shadow - the path of totality - during the total solar eclipse on August 21, 2017, as well as the obscuration (the fraction of the Sun's area covered by the Moon) in places outside the umbral path. ![]()
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