Solar Eclipse Prime Page
Annular Solar Eclipse of -1677 Aug 20 (1678 Aug 20 BCE)
Fred Espenak
Introduction
The Annular Solar Eclipse of -1677 Aug 20 (1678 Aug 20 BCE) is visible from the geographic regions shown on the map to the right. 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 -1677 Aug 20 at 14:56:01 TD (04:07:51 UT1). This is 6.2 days after the Moon reaches apogee. During the eclipse, the Sun is in the constellation Virgo. The synodic month in which the eclipse takes place has a Brown Lunation Number of -44518.
The eclipse belongs to Saros 18 and is number 42 of 73 eclipses in the series. All eclipses in this series occur at the Moons descending node. The Moon moves northward with respect to the node with each succeeding eclipse in the series and gamma increases.
The annular solar eclipse of -1677 Aug 20 is preceded two weeks earlier by a penumbral lunar eclipse on -1677 Aug 05, and it is followed two weeks later by a penumbral lunar eclipse on -1677 Sep 03.
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 38889.7 seconds for this eclipse. The uncertainty in ΔT is 2484.7 seconds corresponding to a standard error in longitude of the eclipse path of ± 10.38°.
The following links provide maps and data for the eclipse.
- Orthographic Map: Annular Solar Eclipse of -1677 Aug 20 - global map of eclipse visibility
- Google Map: Annular Solar Eclipse of -1677 Aug 20 - interactive map of the eclipse path
- Path Table: Annular Solar Eclipse of -1677 Aug 20 - coordinates of the central line and path limits
- Circumstances Table: Annular Solar Eclipse of -1677 Aug 20 - eclipse times for hundreds of cities
- Saros 18 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Annular Solar Eclipse of -1677 Aug 20 .