Solar eclipse of October 12, 1958
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A total solar eclipse occurred at the Moon's ascending node of orbit on Sunday, October 12, 1958, with a magnitude of 1.0608. 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 5.5 hours before perigee (on October 13, 1958, at 2:30 UTC), the Moon's apparent diameter was larger.
Totality was visible in Tokelau, Cook Islands, French Polynesia, Chile and Argentina. A partial eclipse was visible for parts of Eastern Australia, Oceania, and western South America.
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.
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1958 October 12 at 18:20:31.5 UTC |
| First Umbral External Contact | 1958 October 12 at 19:15:58.5 UTC |
| First Central Line | 1958 October 12 at 19:17:11.0 UTC |
| First Umbral Internal Contact | 1958 October 12 at 19:18:23.5 UTC |
| First Penumbral Internal Contact | 1958 October 12 at 20:18:33.1 UTC |
| Ecliptic Conjunction | 1958 October 12 at 20:52:27.4 UTC |
| Greatest Eclipse | 1958 October 12 at 20:55:28.0 UTC |
| Greatest Duration | 1958 October 12 at 20:57:26.1 UTC |
| Equatorial Conjunction | 1958 October 12 at 21:04:31.8 UTC |
| Last Penumbral Internal Contact | 1958 October 12 at 21:32:08.7 UTC |
| Last Umbral Internal Contact | 1958 October 12 at 22:32:25.5 UTC |
| Last Central Line | 1958 October 12 at 22:33:38.3 UTC |
| Last Umbral External Contact | 1958 October 12 at 22:34:51.1 UTC |
| Last Penumbral External Contact | 1958 October 12 at 23:30:19.6 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 1.06084 |
| Eclipse Obscuration | 1.12539 |
| Gamma | −0.29506 |
| Sun Right Ascension | 13h10m12.6s |
| Sun Declination | -07°27'01.0" |
| Sun Semi-Diameter | 16'01.8" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 13h09m51.7s |
| Moon Declination | -07°44'19.9" |
| Moon Semi-Diameter | 16'43.7" |
| Moon Equatorial Horizontal Parallax | 1°01'23.7" |
| ΔT | 32.6 s |
Eclipse season
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 12 Ascending node (new moon) | October 27 Descending node (full moon) |
|---|---|
| Total solar eclipse Solar Saros 133 | Penumbral lunar eclipse Lunar Saros 145 |
Related eclipses
Eclipses in 1958
- A penumbral lunar eclipse on April 4.
- An annular solar eclipse on April 19.
- A partial lunar eclipse on May 3.
- A total solar eclipse on October 12.
- A penumbral lunar eclipse on October 27.
Metonic
- Preceded by: Solar eclipse of December 25, 1954
- Followed by: Solar eclipse of July 31, 1962
Tzolkinex
- Preceded by: Solar eclipse of September 1, 1951
- Followed by: Solar eclipse of November 23, 1965
Half-Saros
- Preceded by: Lunar eclipse of October 7, 1949
- Followed by: Lunar eclipse of October 18, 1967
Tritos
- Preceded by: Solar eclipse of November 12, 1947
- Followed by: Solar eclipse of September 11, 1969
Solar Saros 133
- Preceded by: Solar eclipse of October 1, 1940
- Followed by: Solar eclipse of October 23, 1976
Inex
- Preceded by: Solar eclipse of November 1, 1929
- Followed by: Solar eclipse of September 23, 1987
Triad
- Preceded by: Solar eclipse of December 12, 1871
- Followed by: Solar eclipse of August 12, 2045
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 to 1960 | |||||
|---|---|---|---|---|---|
| Descending node | Ascending node | ||||
| Saros | Map | Gamma | Saros | Map | Gamma |
| 118 | April 30, 1957 Annular (non-central) | 0.9992 | 123 | October 23, 1957 Total (non-central) | 1.0022 |
| 128 | April 19, 1958 Annular | 0.275 | 133 | October 12, 1958 Total | −0.2951 |
| 138 | April 8, 1959 Annular | −0.4546 | 143 | October 2, 1959 Total | 0.4207 |
| 148 | March 27, 1960 Partial | −1.1537 | 153 | September 20, 1960 Partial | 1.2057 |
Saros 133
This eclipse is a part of Saros series 133, repeating every 18 years, 11 days, and containing 72 events. The series started with a partial solar eclipse on July 13, 1219. It contains annular eclipses from November 20, 1435 through January 13, 1526; a hybrid eclipse on January 24, 1544; and total eclipses from February 3, 1562 through June 21, 2373. The series ends at member 72 as a partial eclipse on September 5, 2499. Its 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.
The longest duration of annularity was produced by member 25 at 1 minutes, 14 seconds on November 30, 1453, and the longest duration of totality was produced by member 61 at 6 minutes, 50 seconds on August 7, 1850. All eclipses in this series occur at the Moon’s ascending node of orbit.
| Series members 34–55 occur between 1801 and 2200: | ||
|---|---|---|
| 34 | 35 | 36 |
| July 17, 1814 | July 27, 1832 | August 7, 1850 |
| 37 | 38 | 39 |
| August 18, 1868 | August 29, 1886 | September 9, 1904 |
| 40 | 41 | 42 |
| September 21, 1922 | October 1, 1940 | October 12, 1958 |
| 43 | 44 | 45 |
| October 23, 1976 | November 3, 1994 | November 13, 2012 |
| 46 | 47 | 48 |
| November 25, 2030 | December 5, 2048 | December 17, 2066 |
| 49 | 50 | 51 |
| December 27, 2084 | January 8, 2103 | January 19, 2121 |
| 52 | 53 | 54 |
| January 30, 2139 | February 9, 2157 | February 21, 2175 |
| 55 | ||
| March 3, 2193 |
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 December 24, 1916 and July 31, 2000 | ||||
|---|---|---|---|---|
| December 24–25 | October 12 | July 31–August 1 | May 19–20 | March 7 |
| 111 | 113 | 115 | 117 | 119 |
| December 24, 1916 | July 31, 1924 | May 19, 1928 | March 7, 1932 | |
| 121 | 123 | 125 | 127 | 129 |
| December 25, 1935 | October 12, 1939 | August 1, 1943 | May 20, 1947 | March 7, 1951 |
| 131 | 133 | 135 | 137 | 139 |
| December 25, 1954 | October 12, 1958 | July 31, 1962 | May 20, 1966 | March 7, 1970 |
| 141 | 143 | 145 | 147 | 149 |
| December 24, 1973 | October 12, 1977 | July 31, 1981 | May 19, 1985 | March 7, 1989 |
| 151 | 153 | 155 | ||
| December 24, 1992 | October 12, 1996 | July 31, 2000 |
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 1801 and 2200 | ||||
|---|---|---|---|---|
| December 21, 1805 (Saros 119) | November 19, 1816 (Saros 120) | October 20, 1827 (Saros 121) | September 18, 1838 (Saros 122) | August 18, 1849 (Saros 123) |
| July 18, 1860 (Saros 124) | June 18, 1871 (Saros 125) | May 17, 1882 (Saros 126) | April 16, 1893 (Saros 127) | March 17, 1904 (Saros 128) |
| February 14, 1915 (Saros 129) | January 14, 1926 (Saros 130) | December 13, 1936 (Saros 131) | November 12, 1947 (Saros 132) | October 12, 1958 (Saros 133) |
| September 11, 1969 (Saros 134) | August 10, 1980 (Saros 135) | July 11, 1991 (Saros 136) | June 10, 2002 (Saros 137) | May 10, 2013 (Saros 138) |
| April 8, 2024 (Saros 139) | March 9, 2035 (Saros 140) | February 5, 2046 (Saros 141) | January 5, 2057 (Saros 142) | December 6, 2067 (Saros 143) |
| November 4, 2078 (Saros 144) | October 4, 2089 (Saros 145) | September 4, 2100 (Saros 146) | August 4, 2111 (Saros 147) | July 4, 2122 (Saros 148) |
| June 3, 2133 (Saros 149) | May 3, 2144 (Saros 150) | April 2, 2155 (Saros 151) | March 2, 2166 (Saros 152) | January 29, 2177 (Saros 153) |
| December 29, 2187 (Saros 154) | November 28, 2198 (Saros 155) |
Inex series
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 | ||
|---|---|---|
| January 21, 1814 (Saros 128) | December 31, 1842 (Saros 129) | December 12, 1871 (Saros 130) |
| November 22, 1900 (Saros 131) | November 1, 1929 (Saros 132) | October 12, 1958 (Saros 133) |
| September 23, 1987 (Saros 134) | September 1, 2016 (Saros 135) | August 12, 2045 (Saros 136) |
| July 24, 2074 (Saros 137) | July 4, 2103 (Saros 138) | June 13, 2132 (Saros 139) |
| May 25, 2161 (Saros 140) | May 4, 2190 (Saros 141) |
Notes
- Eclipse Predictions by Fred Espenak, NASA/GSFC