Penumbral Lunar Eclipse of 1915 Jan 31
Fred Espenak
Key to Lunar Eclipse Figure (below)
Introduction
The Penumbral Lunar Eclipse of 1915 Jan 31 is visible from the following geographic regions:
- Americas, Europe, western Africa
The diagram to the right depicts the Moon's path with respect to Earth's umbral and penumbral shadows. Below it is a map showing the geographic regions of eclipse visibility. 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 1915 Jan 31 at 04:57:45 TD (04:57:28 UT1). This is 6.8 days after the Moon reaches apogee. During the eclipse, the Moon is in the constellation Cancer. The synodic month in which the eclipse takes place has a Brown Lunation Number of -98.
The eclipse belongs to Saros 103 and is number 81 of 82 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 is a very shallow penumbral eclipse. It has a penumbral eclipse magnitude of only 0.0453 and a penumbral eclipse duration of 62.1 minutes. Gamma has a value of 1.5450.
The penumbral lunar eclipse of 1915 Jan 31 is followed two weeks later by a annular solar eclipse on 1915 Feb 14.
Another lunar eclipse occurs one synodic month after the 1915 Jan 31 eclipse. It is the penumbral lunar eclipse of 1915 Mar 01.
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., TD = UT1 + ΔT). ΔT has a value of 17.2 seconds for this eclipse.
The following links provide maps and data for the eclipse.
- Detailed Lunar Eclipse Figure - eclipse geometry diagram and map of eclipse visibility (Key to Figure)
- Saros 103 Table - data for all eclipses in the Saros series
The tables below contain detailed predictions and additional information on the Penumbral Lunar Eclipse of 1915 Jan 31 .