| Type: | partial |
| Date: | 13 May 1976 |
| Axis: | 0.9721° |
| Gamma: | 0.95860 |
| Magnitude: | 0.12170 |
| Saros Ser: | 140 |
| Saros No: | 23 of 79 |
| Partiality: | 75 minutes, 23.8 seconds |
| Penumbral: | 251 minutes, 54.4 seconds |
| P1: | 17:48:22.8 |
| U1: | 19:16:36.2 |
| Greatest: | 19:54:21.1 |
| U4: | 20:32:00.0 |
| P4: | 22:00:17.2 |
| Previous: | November 1975 |
| Next: | November 1976 |
A partial lunar eclipse took place on Thursday, May 13, 1976, the first of two lunar eclipses in 1976, the second being a penumbral lunar eclipse on November 6, 1976. At maximum eclipse, a small bite out of the Moon should have been visible. The eclipse lasted for 1 hour, 15 minutes and 23.8 seconds, with just 12.17% of the Moon in shadow at maximum. Occurring only 1.1 days after perigee (Perigee on Wednesday, May 12, 1976), the Moon's apparent diameter 5.4% larger than average.[1]
This is the second eclipse this season.
First eclipse this season: Annular solar eclipse of April 29, 1976
Lunar Saros 140, repeating every 18 years and 11 days, has a total of 77 lunar eclipse events including 28 total lunar eclipses. This is the 22nd member of Lunar Saros 140. The previous event was the May 1958 lunar eclipse. The next event is the May 1994 lunar eclipse.
Previous event: Partial Lunar Eclipse on Saturday, May 3, 1958
This event: Partial Lunar Eclipse on Thursday, May 13, 1976
Next event: Partial Lunar Eclipse on Wednesday, May 25, 1994
It was completely visible over South America, Europe, Africa, Asia and Australia, seen rising over South America, Europe and Africa, and setting over Asia and Australia. At the greatest eclipse about 12.17% of the Moon was covered by the Earth's shadow.
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to two partial solar eclipses of Solar Saros 147.