May 2013 lunar eclipse
A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, May 25, 2013, with an umbral magnitude of −0.9322. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A penumbral lunar eclipse occurs when part or all of the Moon's near side passes into the Earth's penumbra. Unlike a solar eclipse, which can only be viewed from a relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of Earth. Occurring only about 18 hours before perigee, the Moon's apparent diameter was larger.
This eclipse was visually imperceptible due to the small entry into the penumbral shadow. It also marked the beginning of Saros series 150.
Visibility
The eclipse was completely visible over much of North and South America, west Africa, and western Europe, seen rising over the central Pacific Ocean and western Canada and setting over central Europe and central Africa.Eclipse details
Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.| Parameter | Value |
| Penumbral Magnitude | 0.01702 |
| Umbral Magnitude | −0.93215 |
| Gamma | 1.53512 |
| Sun Right Ascension | 04h08m32.9s |
| Sun Declination | +20°58'05.1" |
| Sun Semi-Diameter | 15'47.5" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 16h09m09.9s |
| Moon Declination | -19°24'45.3" |
| Moon Semi-Diameter | 16'38.2" |
| Moon Equatorial Horizontal Parallax | 1°01'03.5" |
| ΔT | 67.1 s |
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight. The first and last eclipse in this sequence is separated by one synodic month.| April 25 Ascending node | May 10 Descending node | May 25 Ascending node |
| Partial lunar eclipse Lunar Saros 112 | Annular solar eclipse Solar Saros 138 | Penumbral lunar eclipse Lunar Saros 150 |
Related eclipses
Eclipses in 2013
- A partial lunar eclipse on April 25.
- An annular solar eclipse on May 10.A penumbral lunar eclipse on May 25.
- A penumbral lunar eclipse on October 18.
- A hybrid solar eclipse on November 3.
Metonic
- Preceded by: Lunar eclipse of August 6, 2009
Tzolkinex
- Followed by: Lunar eclipse of July 5, 2020
Tritos
- Preceded by: Lunar eclipse of June 24, 2002
Lunar Saros 150
- Followed by: Lunar eclipse of June 5, 2031
Inex
- Preceded by: Lunar eclipse of June 13, 1984
Triad
- Preceded by: Lunar eclipse of July 25, 1926