November 1957 lunar eclipse
Template:Short description Template:Infobox lunar eclipse A total lunar eclipse occurred at the Moon’s descending node of orbit on Thursday, November 7, 1957,[1] with an umbral magnitude of 1.0305. A lunar eclipse occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. A total lunar eclipse occurs when the Moon's near side entirely passes into the Earth's umbral shadow. 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. A total lunar eclipse can last up to nearly two hours, while a total solar eclipse lasts only a few minutes at any given place, because the Moon's shadow is smaller. Occurring about 5.1 days after apogee (on November 2, 1957, at 11:30 UTC), the Moon's apparent diameter was smaller.[2]
This lunar eclipse was the last of an almost tetrad, with the others being on May 24, 1956 (partial); November 18, 1956 (total); and May 13, 1957 (total).
Visibility
The eclipse was completely visible over the eastern half of Asia, Australia, and Alaska, seen rising over the western half of Asia, Europe, and much of central and east Africa and setting over much of North America.[3]
| File:Lunar eclipse from moon-1957Nov07.png File:Lunar eclipse chart close-1957Nov07.png |
Eclipse details
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 | 2.09628 |
| Umbral Magnitude | 1.03050 |
| Gamma | −0.43321 |
| Sun Right Ascension | 14h49m49.6s |
| Sun Declination | -16°18'55.4" |
| Sun Semi-Diameter | 16'08.6" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 02h50m09.3s |
| Moon Declination | +15°55'18.7" |
| Moon Semi-Diameter | 15'08.8" |
| Moon Equatorial Horizontal Parallax | 0°55'35.5" |
| ΔT | 32.2 s |
Eclipse season
Script error: No such module "Labelled list hatnote". 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.
| October 23 Ascending node (new moon) |
November 7 Descending node (full moon) |
|---|---|
| File:SE1957Oct23T.png | File:Lunar eclipse chart close-1957Nov07.png |
| Total solar eclipse Solar Saros 123 |
Total lunar eclipse Lunar Saros 135 |
Related eclipses
Eclipses in 1957
- An annular solar eclipse on April 30.
- A total lunar eclipse on May 13.
- A total solar eclipse on October 23.
- A total lunar eclipse on November 7.
Metonic
- Preceded by: Lunar eclipse of January 19, 1954
- Followed by: Lunar eclipse of August 26, 1961
Tzolkinex
- Preceded by: Lunar eclipse of September 26, 1950
- Followed by: Lunar eclipse of December 19, 1964
Half-Saros
- Preceded by: Solar eclipse of November 1, 1948
- Followed by: Solar eclipse of November 12, 1966
Tritos
- Preceded by: Lunar eclipse of December 8, 1946
- Followed by: Lunar eclipse of October 6, 1968
Lunar Saros 135
- Preceded by: Lunar eclipse of October 28, 1939
- Followed by: Lunar eclipse of November 18, 1975
Inex
- Preceded by: Lunar eclipse of November 27, 1928
- Followed by: Lunar eclipse of October 17, 1986
Triad
- Preceded by: Lunar eclipse of January 6, 1871
- Followed by: Lunar eclipse of September 7, 2044
Lunar eclipses of 1955–1958
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 eclipse on January 8, 1955 occurs in the previous lunar year eclipse set, and the penumbral lunar eclipse on April 4, 1958 occurs in the next lunar year eclipse set.
Saros 135
Template:Lunar Saros series 135
Tritos series
Template:Lunar Tritos series July 2001
Inex series
Template:Lunar Inex series September 2015
Half-Saros cycle
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[6] This lunar eclipse is related to two total solar eclipses of Solar Saros 142.
| November 1, 1948 | November 12, 1966 |
|---|---|
| File:SE1948Nov01T.png | File:SE1966Nov12T.png |
See also
References
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- ↑ Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros
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External links
- 1957 Nov 07 chart Eclipse Predictions by Fred Espenak, NASA/GSFC
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