Solar eclipse of October 23, 1957
# Solar eclipse of October 23, 1957

A total solar eclipse occurred on October 23, 1957. 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. This total solar eclipse is non-central because gamma is between 0.9972 and 1.0260.

## Related eclipses

### 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.

Solar eclipse series sets from 1957–1960 :

| Descending node | Descending node | Ascending node | Ascending node |
| - | - | - | - |
| Saros | Map | Saros | Map |
| 118 | 1957 April 30 Annular (non-central) | 123 | 1957 October 23 Total (non-central) |
| 128 | 1958 April 19 Annular | 133 | 1958 October 12 Total |
| 138 | 1959 April 8 Annular | 143 | 1959 October 2 Total |
| 148 | 1960 March 27 Partial | 153 | 1960 September 20 Partial |

### Tritos series

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.

Series members between 1901 and 2100 :

| March 29, 1903 (Saros 118) | February 25, 1914 (Saros 119) | January 24, 1925 (Saros 120) |
| - | - | - |
| December 25, 1935 (Saros 121) | November 23, 1946 (Saros 122) | October 23, 1957 (Saros 123) |
| September 22, 1968 (Saros 124) | August 22, 1979 (Saros 125) | July 22, 1990 (Saros 126) |
| June 21, 2001 (Saros 127) | May 20, 2012 (Saros 128) | April 20, 2023 (Saros 129) |
| March 20, 2034 (Saros 130) | February 16, 2045 (Saros 131) | January 16, 2056 (Saros 132) |
| December 17, 2066 (Saros 133) | November 15, 2077 (Saros 134) | October 14, 2088 (Saros 135) |
| September 14, 2099 (Saros 136) | |

### 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.

22 eclipse events between January 5, 1935 and August 11, 2018 :

| January 4-5 | October 23-24 | August 10-12 | May 30-31 | March 18-19 |
| - | - | - | - | - |
| 111 | 113 | 115 | 117 | 119 |
| January 5, 1935 | | August 12, 1942 | May 30, 1946 | March 18, 1950 |
| 121 | 123 | 125 | 127 | 129 |
| January 5, 1954 | October 23, 1957 | August 11, 1961 | May 30, 1965 | March 18, 1969 |
| 131 | 133 | 135 | 137 | 139 |
| January 4, 1973 | October 23, 1976 | August 10, 1980 | May 30, 1984 | March 18, 1988 |
| 141 | 143 | 145 | 147 | 149 |
| January 4, 1992 | October 24, 1995 | August 11, 1999 | May 31, 2003 | March 19, 2007 |
| 151 | 153 | 155 |
| January 4, 2011 | October 23, 2014 | August 11, 2018 | | |
