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20th-century partial solar eclipse From Wikipedia, the free encyclopedia
A partial solar eclipse occurred at the Moon's ascending node of orbit on Sunday, February 3, 1935,[1] with a magnitude of 0.739. 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 partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
This was the second of five solar eclipses in 1935, with the others occurring on January 5, June 30, July 30, and December 25. The next time this will occur is 2206.
A partial eclipse was visible for most of North America.
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.[2]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 1935 February 03 at 14:30:31.4 UTC |
| Greatest Eclipse | 1935 February 03 at 16:16:20.2 UTC |
| Ecliptic Conjunction | 1935 February 03 at 16:27:42.1 UTC |
| Equatorial Conjunction | 1935 February 03 at 17:04:33.7 UTC |
| Last Penumbral External Contact | 1935 February 03 at 18:01:48.2 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.73901 |
| Eclipse Obscuration | 0.67784 |
| Gamma | 1.14380 |
| Sun Right Ascension | 21h05m33.3s |
| Sun Declination | -16°39'23.6" |
| Sun Semi-Diameter | 16'13.5" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 21h03m43.1s |
| Moon Declination | -15°34'30.3" |
| Moon Semi-Diameter | 16'44.0" |
| Moon Equatorial Horizontal Parallax | 1°01'24.9" |
| ΔT | 23.9 s |
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. The first and last eclipse in this sequence is separated by one synodic month.
| January 5 Ascending node (new moon) | January 19 Descending node (full moon) | February 3 Ascending node (new moon) |
|---|---|---|
 |  | |
| Partial solar eclipse Solar Saros 111 | Total lunar eclipse Lunar Saros 123 | Partial solar eclipse Solar Saros 149 |
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.[3]
The partial solar eclipses on April 18, 1931 and October 11, 1931 occur in the previous lunar year eclipse set, and the solar eclipses on January 5, 1935 (partial), June 30, 1935 (partial), and December 25, 1935 (annular) occur in the next lunar year eclipse set.
| Solar eclipse series sets from 1931 to 1935 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 114 | September 12, 1931 Partial |
1.506 | 119 | March 7, 1932 Annular |
−0.9673 | |
| 124 | August 31, 1932 Total |
0.8307 | 129 | February 24, 1933 Annular |
−0.2191 | |
| 134 | August 21, 1933 Annular |
0.0869 | 139 | February 14, 1934 Total |
0.4868 | |
| 144 | August 10, 1934 Annular |
−0.689 | 149 | February 3, 1935 Partial |
1.1438 | |
| 154 | July 30, 1935 Partial |
−1.4259 | ||||
This eclipse is a part of Saros series 149, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on August 21, 1664. It contains total eclipses from April 9, 2043 through October 2, 2331; hybrid eclipses from October 13, 2349 through November 3, 2385; and annular eclipses from November 15, 2403 through July 13, 2800. The series ends at member 71 as a partial eclipse on September 28, 2926. 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 totality will be produced by member 31 at 4 minutes, 10 seconds on July 17, 2205, and the longest duration of annularity will be produced by member 62 at 5 minutes, 6 seconds on June 21, 2764. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]
| Series members 9–30 occur between 1801 and 2200: | ||
|---|---|---|
| 9 | 10 | 11 |
 November 18, 1808 |
 November 29, 1826 |
 December 9, 1844 |
| 12 | 13 | 14 |
 December 21, 1862 |
 December 31, 1880 |
 January 11, 1899 |
| 15 | 16 | 17 |
 January 23, 1917 |
February 3, 1935 |
 February 14, 1953 |
| 18 | 19 | 20 |
 February 25, 1971 |
 March 7, 1989 |
 March 19, 2007 |
| 21 | 22 | 23 |
 March 29, 2025 |
 April 9, 2043 |
 April 20, 2061 |
| 24 | 25 | 26 |
 May 1, 2079 |
 May 11, 2097 |
 May 24, 2115 |
| 27 | 28 | 29 |
 June 3, 2133 |
 June 14, 2151 |
 June 25, 2169 |
| 30 | ||
 July 6, 2187 | ||
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.
| 23 eclipse events between February 3, 1859 and June 29, 1946 | ||||
|---|---|---|---|---|
| February 1–3 | November 21–22 | September 8–10 | June 28–29 | April 16–18 |
| 109 | 111 | 113 | 115 | 117 |
 February 3, 1859 |
 November 21, 1862 |
 June 28, 1870 |
 April 16, 1874 | |
| 119 | 121 | 123 | 125 | 127 |
 February 2, 1878 |
 November 21, 1881 |
 September 8, 1885 |
 June 28, 1889 |
 April 16, 1893 |
| 129 | 131 | 133 | 135 | 137 |
 February 1, 1897 |
 November 22, 1900 |
 September 9, 1904 |
 June 28, 1908 |
 April 17, 1912 |
| 139 | 141 | 143 | 145 | 147 |
 February 3, 1916 |
 November 22, 1919 |
 September 10, 1923 |
 June 29, 1927 |
 April 18, 1931 |
| 149 | 151 | 153 | 155 | |
February 3, 1935 |
 November 21, 1938 |
 September 10, 1942 |
 June 29, 1946 | |
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.
The partial solar eclipse on October 24, 2098 (part of Saros 164) is also a part of this series but is not included in the table below.
| Series members between 1801 and 2011 | ||||
|---|---|---|---|---|
 February 11, 1804 (Saros 137) |
 January 10, 1815 (Saros 138) |
 December 9, 1825 (Saros 139) |
 November 9, 1836 (Saros 140) |
 October 9, 1847 (Saros 141) |
 September 7, 1858 (Saros 142) |
 August 7, 1869 (Saros 143) |
 July 7, 1880 (Saros 144) |
 June 6, 1891 (Saros 145) |
 May 7, 1902 (Saros 146) |
 April 6, 1913 (Saros 147) |
 March 5, 1924 (Saros 148) |
February 3, 1935 (Saros 149) |
 January 3, 1946 (Saros 150) |
 December 2, 1956 (Saros 151) |
 November 2, 1967 (Saros 152) |
 October 2, 1978 (Saros 153) |
 August 31, 1989 (Saros 154) |
 July 31, 2000 (Saros 155) |
 July 1, 2011 (Saros 156) |
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 | ||
|---|---|---|
 April 24, 1819 (Saros 145) |
 April 3, 1848 (Saros 146) |
 March 15, 1877 (Saros 147) |
 February 23, 1906 (Saros 148) |
February 3, 1935 (Saros 149) |
 January 14, 1964 (Saros 150) |
 December 24, 1992 (Saros 151) |
 December 4, 2021 (Saros 152) |
 November 14, 2050 (Saros 153) |
 October 24, 2079 (Saros 154) |
 October 5, 2108 (Saros 155) |
 September 15, 2137 (Saros 156) |
 August 25, 2166 (Saros 157) |
 August 5, 2195 (Saros 158) |
|
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