Solar eclipse of October 23, 1957
Template:Short description Script error: No such module "Solar eclipse". A total solar eclipse occurred at the Moon's ascending node of orbit on Wednesday, October 23, 1957,[1] with a magnitude of 1.0013. 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 total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 1.4 days after perigee (on October 21, 1957, at 13:10 UTC), the Moon's apparent diameter was larger.[2]
It was unusual that while it is a total solar eclipse, it is not a central one. A non-central eclipse is one where the center-line of totality does not intersect the surface of the Earth (when the gamma is between 0.9972 and 1.0260). Instead, the center line passes just above the Earth's surface. This rare type occurs when totality is only visible at sunset or sunrise in a polar region.
While totality was not visible for any land masses, a partial eclipse was visible for Southern Africa, Antarctica, and New Zealand. This was the last of 44 umbral solar eclipses in Solar Saros 123.
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.[3]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1957 October 23 at 02:51:30.3 UTC |
| Ecliptic Conjunction | 1957 October 23 at 04:43:52.2 UTC |
| First Umbral External Contact | 1957 October 23 at 04:49:55.5 UTC |
| Greatest Eclipse | 1957 October 23 at 04:54:02.5 UTC |
| Last Umbral External Contact | 1957 October 23 at 04:57:47.0 UTC |
| Equatorial Conjunction | 1957 October 23 at 05:22:28.4 UTC |
| Last Penumbral External Contact | 1957 October 23 at 06:56:24.8 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 1.00130 |
| Eclipse Obscuration | - |
| Gamma | −1.00218 |
| Sun Right Ascension | 13h49m48.9s |
| Sun Declination | -11°18'19.3" |
| Sun Semi-Diameter | 16'04.7" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 13h48m44.3s |
| Moon Declination | -12°16'32.6" |
| Moon Semi-Diameter | 16'26.5" |
| Moon Equatorial Horizontal Parallax | 1°00'20.5" |
| ΔT | 32.1 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: Solar eclipse of January 5, 1954
- Followed by: Solar eclipse of August 11, 1961
Tzolkinex
- Preceded by: Solar eclipse of September 12, 1950
- Followed by: Solar eclipse of December 4, 1964
Half-Saros
- Preceded by: Lunar eclipse of October 18, 1948
- Followed by: Lunar eclipse of October 29, 1966
Tritos
- Preceded by: Solar eclipse of November 23, 1946
- Followed by: Solar eclipse of September 22, 1968
Solar Saros 123
- Preceded by: Solar eclipse of October 12, 1939
- Followed by: Solar eclipse of November 3, 1975
Inex
- Preceded by: Solar eclipse of November 12, 1928
- Followed by: Solar eclipse of October 3, 1986
Triad
- Preceded by: Solar eclipse of December 22, 1870
- Followed by: Solar eclipse of August 23, 2044
Solar eclipses of 1957–1960
This eclipse is a member of a semester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[4]
| Solar eclipse series sets from 1957 to 1960 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 118 | April 30, 1957 File:SE1957Apr30A.png Annular (non-central) |
0.9992 | 123 | October 23, 1957 File:SE1957Oct23T.png Total (non-central) |
1.0022 | |
| 128 | April 19, 1958 File:SE1958Apr19A.png Annular |
0.275 | 133 | October 12, 1958 File:SE1958Oct12T.png Total |
−0.2951 | |
| 138 | April 8, 1959 File:SE1959Apr08A.png Annular |
−0.4546 | 143 | October 2, 1959 File:SE1959Oct02T.png Total |
0.4207 | |
| 148 | March 27, 1960 File:SE1960Mar27P.png Partial |
−1.1537 | 153 | September 20, 1960 File:SE1960Sep20P.png Partial |
1.2057 | |
Saros 123
Template:Solar Saros series 123
Metonic series
The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition, the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days). All eclipses in this table occur at the Moon's ascending node.
Tritos series
Template:Solar Tritos series 2001 June 21
Inex series
Template:Solar Inex series 2015 September 13
Notes
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References
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
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