Solar eclipse of October 1, 1940
# Solar eclipse of October 1, 1940

A total solar eclipse occurred on Tuesday, October 1, 1940. 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. Totality was visible from Colombia, Brazil, Venezuela and South Africa.

## Related eclipses

### Solar eclipses 1939–1942

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 1939–1942 :

| Descending node | Descending node | Ascending node | Ascending node |
| - | - | - | - |
| Saros | Map | Saros | Map |
| 118 | April 19, 1939 Annular | 123 | October 12, 1939 Total |
| 128 | April 7, 1940 Annular | 133 | October 1, 1940 Total |
| 138 | March 27, 1941 Annular | 143 | September 21, 1941 Total |
| 148 | March 16, 1942 Partial | 153 | September 10, 1942 Partial |
| The partial solar eclipse on August 12, 1942 occurs in the next lunar year eclipse set. |||||

### Saros 133

Solar Saros 133, repeating every 18 years, 11 days, contains 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, with a hybrid eclipse on January 24, 1544. It has total eclipses from February 3, 1562, through June 21, 2373. The series ends at member 72 as a partial eclipse on September 5, 2499. The longest duration of totality was 6 minutes, 49.97 seconds on August 7, 1850. The total eclipses of this saros series are getting shorter and farther south with each iteration. All eclipses in this series occurs at the Moon’s ascending node.

Series members 30–56 occur between 1742 and 2211 :

| 30 | 31 | 32 |
| - | - | - |
| June 3, 1742 | June 13, 1760 | June 24, 1778 |
| 33 | 34 | 35 |
| July 4, 1796 | July 17, 1814 | July 27, 1832 |
| 36 | 37 | 38 |
| August 7, 1850 | August 18, 1868 | August 29, 1886 |
| 39 | 40 | 41 |
| September 9, 1904 | September 21, 1922 | October 1, 1940 |
| 42 | 43 | 44 |
| October 12, 1958 | October 23, 1976 | November 3, 1994 |
| 45 | 46 | 47 |
| November 13, 2012 | November 25, 2030 | December 5, 2048 |
| 48 | 49 | 50 |
| December 17, 2066 | December 27, 2084 | January 8, 2103 |
| 51 | 52 | 53 |
| January 19, 2121 | January 30, 2139 | February 9, 2157 |
| 54 | 55 | 56 |
| February 21, 2175 | March 3, 2193 | March 15, 2211 |

### 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).

22 eclipse events between December 13, 1898 and July 20, 1982 :

| December 13–14 | October 1–2 | July 20–21 | May 9 | February 24–25 |
| - | - | - | - | - |
| 111 | 113 | 115 | 117 | 119 |
| December 13, 1898 | | July 21, 1906 | May 9, 1910 | February 25, 1914 |
| 121 | 123 | 125 | 127 | 129 |
| December 14, 1917 | October 1, 1921 | July 20, 1925 | May 9, 1929 | February 24, 1933 |
| 131 | 133 | 135 | 137 | 139 |
| December 13, 1936 | October 1, 1940 | July 20, 1944 | May 9, 1948 | February 25, 1952 |
| 141 | 143 | 145 | 147 | 149 |
| December 14, 1955 | October 2, 1959 | July 20, 1963 | May 9, 1967 | February 25, 1971 |
| 151 | 153 | 155 |
| December 13, 1974 | October 2, 1978 | July 20, 1982 |
