Total Lunar Eclipse of -1758 Jul 01 (1759 Jul 01 BCE)
Fred Espenak
Introduction
The Total Lunar Eclipse of -1758 Jul 01 (1759 Jul 01 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 -1758 Jul 01 at 22:29:60 TD (11:11:23 UT1). This is 5.0 days after the Moon reaches perigee. During the eclipse, the Moon is in the constellation Capricornus. The synodic month in which the eclipse takes place has a Brown Lunation Number of -45522.
The eclipse belongs to Saros 11 and is number 35 of 75 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.
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 1.8304, and Gamma has a value of -0.0146. Because they are so deep, such eclipses typically have the longest total phases. In this case, the duration of totality lasts 102.5 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 -1758 Jul 01 is preceded two weeks earlier by a partial solar eclipse on -1758 Jun 18, and it is followed two weeks later by a partial solar eclipse on -1758 Jul 17.
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 40716.9 seconds for this eclipse. The uncertainty in ΔT is 2776.3 seconds corresponding to a standard error in longitude of the eclipse visibility zones of 11.60°.
The following links provide maps and data for the eclipse.
- Eclipse Figure - eclipse geometry diagram and map of eclipse visibility
- Saros 11 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Total Lunar Eclipse of -1758 Jul 01 .