USNO Data for 2017 Solar Eclipse for
USNO Clear Sky Chart

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EventLocal Time (UT-4.0)Safety action
Start of partial Eclipse2017-08-21 13:17:47eclipse glasses ON
Maximum Eclipse2017-08-21 14:42:42 Max coverage 81.1%watch 2h44m of partially covered sun
End of Partial Eclipse2017-08-21 16:01:32eclipse glasses off, resume mundane life

See more detail at USNO's webpage for this chart. (May be very slow.)

Local times are accurate only if the timezone for the USNO clear sky chart is really UT-4.)Also, times, even on USNO's page, are accurate only if the latitude/longitude of the chart for USNO is accurate. Check the road map.

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