Solar Eclipse Prime Page
Total Solar Eclipse of 2017 Aug 21
The Total Solar Eclipse of 2017 Aug 21 is visible from the following geographic regions:
- Partial Eclipse: North America, north South America
- Total Eclipse: north Pacific, U.S., south Atlantic
The map to the right depicts the geographic regions of eclipse visibility. Click on the map to enlarge it. For an explanation of the features appearing in the map, see Key to Solar Eclipse Maps.
The instant of greatest eclipse takes place on 2017 Aug 21 at 18:26:40 TD (18:25:32 UT1). This is 3.2 days after the Moon reaches perigee. During the eclipse, the Sun is in the constellation Leo. The synodic month in which the eclipse takes place has a Brown Lunation Number of 1171.
The eclipse belongs to Saros 145 and is number 22 of 77 eclipses in the series. All eclipses in this series occur at the Moons ascending node. The Moon moves southward with respect to the node with each succeeding eclipse in the series and gamma decreases.
The total solar eclipse of 2017 Aug 21 is preceded two weeks earlier by a partial lunar eclipse on 2017 Aug 07.
These eclipses all take place during a single eclipse season.
The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 68.5 seconds for this eclipse.
The following links provide maps and data for the eclipse.
- Orthographic Map: Total Solar Eclipse of 2017 Aug 21 - detailed map of eclipse visibility
- Animated Map: Total Solar Eclipse of 2017 Aug 21 - animated map of the Moon's shadows across Earth
- Google Map: Total Solar Eclipse of 2017 Aug 21 - interactive map of the eclipse path
- Path Table: Total Solar Eclipse of 2017 Aug 21 - coordinates of the central line and path limits
- Circumstances Table: Total Solar Eclipse of 2017 Aug 21 - eclipse times for hundreds of cities
- Saros 145 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Total Solar Eclipse of 2017 Aug 21 .