Solar Eclipse Prime Page
Hybrid Solar Eclipse of -1138 Aug 30 (1139 Aug 30 BCE)
Fred Espenak
Introduction
The Hybrid Solar Eclipse of -1138 Aug 30 (1139 Aug 30 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 -1138 Aug 30 at 23:27:53 TD (15:44:17 UT1). This is 3.3 days before the Moon reaches perigee. 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 -37851.
The eclipse belongs to Saros 36 and is number 41 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 solar eclipse of -1138 Aug 30 is one of the rare hybrid solar eclipses. In this particular case the eclipse path starts out as annular but later changes to total. It is a relatively long hybrid eclipse with a duration at greatest eclipse of 01m32s. The eclipse magnitude is 1.0168, while Gamma has a value of 0.0930.
The hybrid solar eclipse of -1138 Aug 30 is preceded two weeks earlier by a penumbral lunar eclipse on -1138 Aug 15, and it is followed two weeks later by a penumbral lunar eclipse on -1138 Sep 14.
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 27815.2 seconds for this eclipse. The uncertainty in ΔT is 915.3 seconds corresponding to a standard error in longitude of the eclipse path of ± 3.82°.
The following links provide maps and data for the eclipse.
- Orthographic Map: Hybrid Solar Eclipse of -1138 Aug 30 - global map of eclipse visibility
- Google Map: Hybrid Solar Eclipse of -1138 Aug 30 - interactive map of the eclipse path
- Path Table: Hybrid Solar Eclipse of -1138 Aug 30 - coordinates of the central line and path limits
- Circumstances Table: Hybrid Solar Eclipse of -1138 Aug 30 - eclipse times for hundreds of cities
- Saros 36 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Hybrid Solar Eclipse of -1138 Aug 30 .