February 1952 lunar eclipse
| Partial eclipse | |||||||||||||
 The Moon's hourly motion shown right to left | |||||||||||||
| Date | February 11, 1952 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gamma | 0.9416 | ||||||||||||
| Magnitude | 0.0832 | ||||||||||||
| Saros cycle | 113 (60 of 71) | ||||||||||||
| Partiality | 70 minutes, 7 seconds | ||||||||||||
| Penumbral | 301 minutes, 55 seconds | ||||||||||||
| |||||||||||||
A partial lunar eclipse occurred at the Moon’s descending node of orbit on Monday, February 11, 1952,[1] with an umbral magnitude of 0.0832. 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 2.7 days after apogee (on February 8, 1952, at 8:25 UTC), the Moon's apparent diameter was smaller.[2]
Visibility
[edit]The eclipse was completely visible over northeastern North America, eastern South America, Europe, Africa, and the Middle East, seen rising over much of North America and western South America and setting over much of Asia.[3]
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Eclipse details
[edit]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 | 1.17816 |
| Umbral Magnitude | 0.08323 |
| Gamma | 0.94161 |
| Sun Right Ascension | 21h34m29.0s |
| Sun Declination | -14°25'36.6" |
| Sun Semi-Diameter | 16'12.4" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 09h35m56.5s |
| Moon Declination | +15°12'10.8" |
| Moon Semi-Diameter | 14'48.1" |
| Moon Equatorial Horizontal Parallax | 0°54'19.3" |
| ΔT | 29.9 s |
Eclipse season
[edit]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 11 Descending node (full moon) |
February 25 Ascending node (new moon) |
|---|---|
|
|
| Partial lunar eclipse Lunar Saros 113 |
Total solar eclipse Solar Saros 139 |
Related eclipses
[edit]Eclipses in 1952
[edit]- A partial lunar eclipse on February 11.
- A total solar eclipse on February 25.
- A partial lunar eclipse on August 5.
- An annular solar eclipse on August 20.
Metonic
[edit]- Preceded by: Lunar eclipse of April 23, 1948
- Followed by: Lunar eclipse of November 29, 1955
Tzolkinex
[edit]- Preceded by: Lunar eclipse of December 29, 1944
- Followed by: Lunar eclipse of March 24, 1959
Half-Saros
[edit]- Preceded by: Solar eclipse of February 4, 1943
- Followed by: Solar eclipse of February 15, 1961
Tritos
[edit]- Preceded by: Lunar eclipse of March 13, 1941
- Followed by: Lunar eclipse of January 9, 1963
Lunar Saros 113
[edit]- Preceded by: Lunar eclipse of January 30, 1934
- Followed by: Lunar eclipse of February 21, 1970
Inex
[edit]- Preceded by: Lunar eclipse of March 3, 1923
- Followed by: Lunar eclipse of January 20, 1981
Triad
[edit]- Preceded by: Lunar eclipse of April 11, 1865
- Followed by: Lunar eclipse of December 11, 2038
Lunar eclipses of 1951–1955
[edit]| Descending node | Ascending node | |||||
|---|---|---|---|---|---|---|
| Saros | Date viewing |
Type chart |
Saros | Date viewing |
Type chart | |
| 103 | 1951 Feb 21
|
Penumbral
|
108 | 1951 Aug 17
|
Penumbral
| |
| 113 | 1952 Feb 11
|
Partial
|
118 | 1952 Aug 5
|
Partial
| |
| 123 | 1953 Jan 29
|
Total
|
128 | 1953 Jul 26
|
Total
| |
| 133 | 1954 Jan 19
|
Total
|
138 | 1954 Jul 16
|
Partial
| |
| 143 | 1955 Jan 8
|
Penumbral
| ||||
| Last set | 1951 Mar 23 | Last set | 1951 Sep 15 | |||
| Next set | 1955 Nov 29 | Next set | 1955 Jun 5 | |||
Half-Saros cycle
[edit]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 120.
| February 4, 1943 | February 15, 1961 |
|---|---|
|
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See also
[edit]Notes
[edit]- ^ "February 10–11, 1952 Partial Lunar Eclipse". timeanddate. Retrieved 22 December 2024.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 22 December 2024.
- ^ "Partial Lunar Eclipse of 1952 Feb 11" (PDF). NASA. Retrieved 22 December 2024.
- ^ "Partial Lunar Eclipse of 1952 Feb 11". EclipseWise.com. Retrieved 22 December 2024.
- ^ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
External links
[edit]- 1952 Feb 11 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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