Total Lunar Eclipse of -0767 Sep 22 (0768 Sep 22 BCE)
Fred Espenak
Introduction
The Total Lunar Eclipse of -0767 Sep 22 (0768 Sep 22 BCE) is visible from the geographic regions shown on the map to the right. The diagram above the map depicts the Moon's path with respect to Earth's umbral and penumbral shadows. Click on the figure to enlarge it. For an explanation of the features appearing in the figure, see Key to Lunar Eclipse Figures.
The instant of greatest eclipse takes place on -0767 Sep 22 at 00:46:22 TD (18:51:55 UT1). This is 2.6 days before the Moon reaches apogee. During the eclipse, the Moon is in the constellation Aries. The synodic month in which the eclipse takes place has a Brown Lunation Number of -33262.
The eclipse belongs to Saros 44 and is number 34 of 85 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.
This total eclipse is central meaning the Moons disk actually passes through the axis of Earths umbral shadow. It has an umbral eclipse magnitude of 1.6036, and Gamma has a value of 0.1145. Because they are so deep, such eclipses typically have the longest total phases. In this case, the duration of totality lasts 101.5 minutes. That qualifies the eclipse as a member of a select class of exceptionally long total eclipses with durations exceeding 100 minutes.
The total lunar eclipse of -0767 Sep 22 is preceded two weeks earlier by a partial solar eclipse on -0767 Sep 07, and it is followed two weeks later by a partial solar eclipse on -0767 Oct 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 21266.9 seconds for this eclipse. The uncertainty in ΔT is 533.2 seconds corresponding to a standard error in longitude of the eclipse visibility zones of 2.23°.
The following links provide maps and data for the eclipse.
- Eclipse Figure - eclipse geometry diagram and map of eclipse visibility
- Saros 44 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Total Lunar Eclipse of -0767 Sep 22 .