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A partial lunar eclipse occurred at the Moon’s descending node of orbit on Sunday, August 15, 1943,[1] with an umbral magnitude of 0.8697. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A partial lunar eclipse occurs when one part of the Moon is in the Earth's umbra, while the other part is in 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 10 hours after perigee (on August 15, 1943, at 9:25 UTC), the Moon's apparent diameter was larger.[2]
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | August 15, 1943 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | −0.5534 | ||||||||||||
| Magnitude | 0.8697 | ||||||||||||
| Saros cycle | 137 (24 of 81) | ||||||||||||
| Partiality | 178 minutes, 23 seconds | ||||||||||||
| Penumbral | 296 minutes, 44 seconds | ||||||||||||
| |||||||||||||
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The eclipse was completely visible over east Africa, much of Asia, western Australia, and Antarctica, seen rising over eastern South America, west Africa, and Europe and setting over northeast Asia and eastern Australia.[3]
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Shown below is a table displaying details about this particular solar eclipse. It describes various parameters pertaining to this eclipse.[4]
| Parameter | Value |
|---|---|
| Penumbral Magnitude | 1.81515 |
| Umbral Magnitude | 0.86970 |
| Gamma | −0.55335 |
| Sun Right Ascension | 09h37m47.7s |
| Sun Declination | +14°09'07.3" |
| Sun Semi-Diameter | 15'47.7" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 21h38m19.9s |
| Moon Declination | -14°42'08.2" |
| Moon Semi-Diameter | 16'42.3" |
| Moon Equatorial Horizontal Parallax | 1°01'18.6" |
| ΔT | 26.2 s |
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This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) 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.
| August 1 Ascending node (new moon) | August 15 Descending node (full moon) |
|---|---|
 | |
| Annular solar eclipse Solar Saros 125 | Partial lunar eclipse Lunar Saros 137 |
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Eclipses in 1943
- A total solar eclipse on February 4.
- A partial lunar eclipse on February 20.
- An annular solar eclipse on August 1.
- A partial lunar eclipse on August 15.
Metonic
- Preceded by: Lunar eclipse of October 28, 1939
- Followed by: Lunar eclipse of June 3, 1947
Tzolkinex
- Preceded by: Lunar eclipse of July 4, 1936
- Followed by: Lunar eclipse of September 26, 1950
Half-Saros
- Preceded by: Solar eclipse of August 10, 1934
- Followed by: Solar eclipse of August 20, 1952
Tritos
- Preceded by: Lunar eclipse of September 14, 1932
- Followed by: Lunar eclipse of July 16, 1954
Lunar Saros 137
- Preceded by: Lunar eclipse of August 4, 1925
- Followed by: Lunar eclipse of August 26, 1961
Inex
- Preceded by: Lunar eclipse of September 4, 1914
- Followed by: Lunar eclipse of July 26, 1972
Triad
- Preceded by: Lunar eclipse of October 13, 1856
- Followed by: Lunar eclipse of June 15, 2030
Lunar eclipses of 1940–1944
| Ascending node | Descending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
| 102 | 1940 Mar 23 |
Penumbral |
107 | |||
| 112 | 1941 Mar 13 |
Partial |
117 | 1941 Sep 05 |
Partial | |
| 122 | 1942 Mar 03 |
Total |
127 | 1942 Aug 26 |
Total | |
| 132 | 1943 Feb 20 |
Partial |
137 | 1943 Aug 15 |
Partial | |
| 142 | 1944 Feb 09 |
Penumbral |
147 | 1944 Aug 04 |
Penumbral | |
Saros 137
It is part of Saros series 137.
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[5] This lunar eclipse is related to two total solar eclipses of Solar Saros 144.
| August 10, 1934 | August 20, 1952 |
|---|---|
 |
 |
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