September 1951 lunar eclipse
A penumbral lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, September 15, 1951, with an umbral magnitude of −0.1927. 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 about 3.6 days after perigee, the Moon's apparent diameter was larger.
This eclipse was the last of four penumbral lunar eclipses in 1951, with the others occurring on February 21, March 23, and August 17.
Visibility
The eclipse was completely visible over east and northeast Asia, Australia, and northwestern North America, seen rising over central and south Asia and setting over much of North America and western South America.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 | 0.80351 |
| Umbral Magnitude | −0.19267 |
| Gamma | 1.11865 |
| Sun Right Ascension | 11h30m04.6s |
| Sun Declination | +03°13'56.1" |
| Sun Semi-Diameter | 15'54.4" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 23h27m58.3s |
| Moon Declination | -02°16'28.5" |
| Moon Semi-Diameter | 15'58.0" |
| Moon Equatorial Horizontal Parallax | 0°58'36.0" |
| ΔT | 29.8 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.| August 17 Ascending node | September 1 Descending node | September 15 Ascending node |
| Penumbral lunar eclipse Lunar Saros 108 | Annular solar eclipse Solar Saros 134 | Penumbral lunar eclipse Lunar Saros 146 |
Related eclipses
Eclipses in 1951
- A penumbral lunar eclipse on February 21.
- An annular solar eclipse on March 7.
- A penumbral lunar eclipse on March 23.
- A penumbral lunar eclipse on August 17.
- An annular solar eclipse on September 1.
- '''A penumbral lunar eclipse on September 15.'''
Metonic
- Preceded by: Lunar eclipse of November 28, 1947
Tzolkinex
- Preceded by: Lunar eclipse of August 4, 1944
- Followed by: Lunar eclipse of October 27, 1958
Half-Saros
- Preceded by: Solar eclipse of September 10, 1942
- Followed by: Solar eclipse of September 20, 1960
Tritos
- Preceded by: Lunar eclipse of October 16, 1940
- Followed by: Lunar eclipse of August 15, 1962
Lunar Saros 146
- Preceded by: Lunar eclipse of September 4, 1933
- Followed by: Lunar eclipse of September 25, 1969
Inex
- Preceded by: Lunar eclipse of October 6, 1922
- Followed by: Lunar eclipse of August 26, 1980
Triad
- Preceded by: Lunar eclipse of November 13, 1864
- Followed by: Lunar eclipse of July 16, 2038
Lunar eclipses of 1948–1951
Saros 146
Tritos series
Inex series
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days. This lunar eclipse is related to two total solar eclipses of Solar Saros 153.| September 10, 1942 | September 20, 1960 |