February 1943 lunar eclipse
| Partial eclipse | |||||||||||||
| File:Lunar eclipse chart close-1943Feb20.png The Moon's hourly motion shown right to left | |||||||||||||
| Date | February 20, 1943 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.5752 | ||||||||||||
| Magnitude | 0.7616 | ||||||||||||
| Saros cycle | 132 (26 of 71) | ||||||||||||
| Partiality | 189 minutes, 1 second | ||||||||||||
| Penumbral | 345 minutes, 8 seconds | ||||||||||||
| |||||||||||||
A partial lunar eclipse occurred at the Moon’s ascending node of orbit on Saturday, February 20, 1943,[1] with an umbral magnitude of 0.7616. 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 about 3.8 days after apogee (on February 16, 1943, at 9:00 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
[edit | edit source]The eclipse was completely visible over North and South America, seen rising over northeast Asia and the central Pacific Ocean and setting over Africa, Europe, and the Middle East.[3]
| File:Lunar eclipse from moon-1943Feb20.png File:Lunar eclipse chart close-1943Feb20.png |
Eclipse details
[edit | edit source]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 | 1.84442 |
| Umbral Magnitude | 0.76156 |
| Gamma | 0.57517 |
| Sun Right Ascension | 22h11m04.8s |
| Sun Declination | -11°13'23.9" |
| Sun Semi-Diameter | 16'10.5" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 10h11m38.1s |
| Moon Declination | +11°43'51.2" |
| Moon Semi-Diameter | 14'56.3" |
| Moon Equatorial Horizontal Parallax | 0°54'49.3" |
| ΔT | 25.9 s |
Eclipse season
[edit | edit source]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.
| February 4 Descending node (new moon) |
February 20 Ascending node (full moon) |
|---|---|
| File:SE1943Feb04T.png | File:Lunar eclipse chart close-1943Feb20.png |
| Total solar eclipse Solar Saros 120 |
Partial lunar eclipse Lunar Saros 132 |
Related eclipses
[edit | edit source]Eclipses in 1943
[edit | edit source]- 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
[edit | edit source]- Preceded by: Lunar eclipse of May 3, 1939
- Followed by: Lunar eclipse of December 8, 1946
Tzolkinex
[edit | edit source]- Preceded by: Lunar eclipse of January 8, 1936
- Followed by: Lunar eclipse of April 2, 1950
Half-Saros
[edit | edit source]- Preceded by: Solar eclipse of February 14, 1934
- Followed by: Solar eclipse of February 25, 1952
Tritos
[edit | edit source]- Preceded by: Lunar eclipse of March 22, 1932
- Followed by: Lunar eclipse of January 19, 1954
Lunar Saros 132
[edit | edit source]- Preceded by: Lunar eclipse of February 8, 1925
- Followed by: Lunar eclipse of March 2, 1961
Inex
[edit | edit source]- Preceded by: Lunar eclipse of March 12, 1914
- Followed by: Lunar eclipse of January 30, 1972
Triad
[edit | edit source]- Preceded by: Lunar eclipse of April 20, 1856
- Followed by: Lunar eclipse of December 20, 2029
Lunar eclipses of 1940–1944
[edit | edit source]This eclipse is a member of a semester series. An eclipse in a semester series of lunar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[5]
The penumbral lunar eclipses on April 22, 1940 and October 16, 1940 occur in the previous lunar year eclipse set, and the penumbral lunar eclipses on July 6, 1944 and December 29, 1944 occur in the next lunar year eclipse set.
Saros 132
[edit | edit source]This eclipse is a part of Saros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a penumbral lunar eclipse on May 12, 1492. It contains partial eclipses from August 16, 1636 through March 24, 1997; total eclipses from April 4, 2015 through August 2, 2213; and a second set of partial eclipses from August 13, 2231 through November 30, 2411. The series ends at member 71 as a penumbral eclipse on June 26, 2754.
The longest duration of totality will be produced by member 36 at 106 minutes, 6 seconds on June 9, 2123. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]
| Greatest | First | |||
|---|---|---|---|---|
| File:Lunar eclipse chart close-2123Jun09.png The greatest eclipse of the series will occur on 2123 Jun 09, lasting 106 minutes, 6 seconds.[7] |
Penumbral | Partial | Total | Central |
| 1492 May 12 File:Lunar eclipse chart close-1492May12.png |
1636 Aug 16 File:Lunar eclipse chart close-1636Aug16.png |
2015 Apr 04 File:Lunar eclipse chart close-2015Apr04.png |
2069 May 06 File:Lunar eclipse chart close-2069May06.png | |
| Last | ||||
| Central | Total | Partial | Penumbral | |
| 2177 Jul 11 File:Lunar eclipse chart close-2177Jul11.png |
2213 Aug 02 File:Lunar eclipse chart close-2213Aug02.png |
2411 Nov 30 |
2754 Jun 26 File:Lunar eclipse chart close-2754Jun26.png | |
Eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.
Tritos series
[edit | edit source]This eclipse is a part of a tritos cycle, repeating at alternating nodes every 135 synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee), but groupings of 3 tritos cycles (≈ 33 years minus 3 months) come close (≈ 434.044 anomalistic months), so eclipses are similar in these groupings.
Inex series
[edit | edit source]This eclipse is a part of the long period inex cycle, repeating at alternating nodes, every 358 synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with the anomalistic month (period of perigee). However, groupings of 3 inex cycles (≈ 87 years minus 2 months) comes close (≈ 1,151.02 anomalistic months), so eclipses are similar in these groupings.
| Series members between 1801 and 2200 | |||||
|---|---|---|---|---|---|
| 1827 May 11 (Saros 128) |
1856 Apr 20 (Saros 129) |
1885 Mar 30 (Saros 130) | |||
| 1914 Mar 12 (Saros 131) |
1943 Feb 20 (Saros 132) |
1972 Jan 30 (Saros 133) | |||
| File:Lunar eclipse chart close-1914Mar12.png | File:Lunar eclipse from moon-1914Mar12.png | File:Lunar eclipse chart close-1943Feb20.png | File:Lunar eclipse from moon-1943Feb20.png | File:Lunar eclipse chart close-1972Jan30.png | File:Lunar eclipse from moon-1972Jan30.png |
| 2001 Jan 09 (Saros 134) |
2029 Dec 20 (Saros 135) |
2058 Nov 30 (Saros 136) | |||
| File:Lunar eclipse chart close-2001Jan09.png | File:Lunar eclipse from moon-2001Jan09.png | File:Lunar eclipse chart close-2029Dec20.png | File:Lunar eclipse from moon-2029Dec20.png | File:Lunar eclipse chart close-2058Nov30.png | File:Lunar eclipse from moon-2058Nov30.png |
| 2087 Nov 10 (Saros 137) |
2116 Oct 21 (Saros 138) |
2145 Sep 30 (Saros 139) | |||
| 2174 Sep 11 (Saros 140) | |||||
Half-Saros cycle
[edit | edit source]A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[8] This lunar eclipse is related to two total solar eclipses of Solar Saros 139.
| February 14, 1934 | February 25, 1952 |
|---|---|
| File:SE1934Feb14T.png | File:SE1952Feb25T.png |
See also
[edit | edit source]References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Listing of Eclipses of series 132
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit | edit source]- Saros series 132
- 1943 Feb 20 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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