Solar eclipse of April 18, 1931
A partial solar eclipse occurred at the Moon's ascending node of orbit between Friday, April 17 and Saturday, April 18, 1931, with a magnitude of 0.5107. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
A partial eclipse was visible for parts of East Asia and North Asia.
Eclipse details
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.| Event | Time |
| First Penumbral External Contact | 1931 April 17 at 22:57:48.0 UTC |
| Greatest Eclipse | 1931 April 18 at 00:45:34.6 UTC |
| Ecliptic Conjunction | 1931 April 18 at 00:59:58.6 UTC |
| Equatorial Conjunction | 1931 April 18 at 01:59:51.2 UTC |
| Last Penumbral External Contact | 1931 April 18 at 02:32:47.7 UTC |
| Parameter | Value |
| Eclipse Magnitude | 0.51068 |
| Eclipse Obscuration | 0.39455 |
| Gamma | 1.26430 |
| Sun Right Ascension | 01h40m20.1s |
| Sun Declination | +10°25'14.0" |
| Sun Semi-Diameter | 15'55.6" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 01h38m13.6s |
| Moon Declination | +11°26'51.3" |
| Moon Semi-Diameter | 14'54.6" |
| Moon Equatorial Horizontal Parallax | 0°54'43.2" |
| ΔT | 24.0 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.| April 2 Descending node | April 18 Ascending node |
| Total lunar eclipse Lunar Saros 121 | Partial solar eclipse Solar Saros 147 |
Related eclipses
Eclipses in 1931
- A total lunar eclipse on April 2.A partial solar eclipse on April 18.
- A partial solar eclipse on September 12.
- A total lunar eclipse on September 26.
- A partial solar eclipse on October 11.
Metonic
- Preceded by: Solar eclipse of June 29, 1927
- Followed by: Solar eclipse of February 3, 1935
Tzolkinex
- Preceded by: Solar eclipse of March 5, 1924
- Followed by: Solar eclipse of May 29, 1938
Half-Saros
- Preceded by: Lunar eclipse of April 11, 1922
- Followed by: Lunar eclipse of April 22, 1940
Tritos
- Preceded by: Solar eclipse of May 18, 1920
- Followed by: Solar eclipse of March 16, 1942
Solar Saros 147
- Preceded by: Solar eclipse of April 6, 1913
- Followed by: Solar eclipse of April 28, 1949
Inex
- Preceded by: Solar eclipse of May 7, 1902
- Followed by: Solar eclipse of March 27, 1960
Triad
- Preceded by: Solar eclipse of June 16, 1844
- Followed by: Solar eclipse of February 15, 2018