Loading AI tools
20th-century annular solar eclipse From Wikipedia, the free encyclopedia
An annular solar eclipse occurred at the Moon's descending node of orbit on Saturday, September 1, 1951,[1] with a magnitude of 0.9747. 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. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Occurring 5.4 days after apogee (on August 27, 1951, at 3:50 UTC), the Moon's apparent diameter was smaller.[2]
Annularity was visible from Tennessee, North Carolina, and Virginia in the United States, Spanish Sahara (today's West Sahara), French West Africa (the parts now belonging to Mauritania, Mali, Burkina Faso and Ivory Coast), British Gold Coast (today's Ghana), southern tip of French Equatorial Africa (the part now belonging to R. Congo), Belgian Congo (today's DR Congo), Northern Rhodesia (today's Zambia), Portuguese Mozambique (today's Mozambique), Nyasaland (today's Malawi), and French Madagascar (today's Madagascar). A partial eclipse was visible for parts of eastern North America, the Caribbean, northern South America, Europe, and Africa.
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 | 1951 September 01 at 09:54:58.5 UTC |
| First Umbral External Contact | 1951 September 01 at 10:57:51.5 UTC |
| First Central Line | 1951 September 01 at 10:59:13.3 UTC |
| First Umbral Internal Contact | 1951 September 01 at 11:00:35.1 UTC |
| Greatest Duration | 1951 September 01 at 11:26:30.5 UTC |
| First Penumbral Internal Contact | 1951 September 01 at 12:04:50.8 UTC |
| Equatorial Conjunction | 1951 September 01 at 12:42:32.1 UTC |
| Ecliptic Conjunction | 1951 September 01 at 12:50:04.3 UTC |
| Greatest Eclipse | 1951 September 01 at 12:51:51.1 UTC |
| Last Penumbral Internal Contact | 1951 September 01 at 13:39:05.6 UTC |
| Last Umbral Internal Contact | 1951 September 01 at 14:43:15.0 UTC |
| Last Central Line | 1951 September 01 at 14:44:34.0 UTC |
| Last Umbral External Contact | 1951 September 01 at 14:45:53.0 UTC |
| Last Penumbral External Contact | 1951 September 01 at 15:48:41.5 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.97473 |
| Eclipse Obscuration | 0.95011 |
| Gamma | 0.15570 |
| Sun Right Ascension | 10h39m41.0s |
| Sun Declination | +08°28'11.5" |
| Sun Semi-Diameter | 15'50.9" |
| Sun Equatorial Horizontal Parallax | 08.7" |
| Moon Right Ascension | 10h39m57.2s |
| Moon Declination | +08°35'52.2" |
| Moon Semi-Diameter | 15'12.7" |
| Moon Equatorial Horizontal Parallax | 0°55'49.8" |
| ΔT | 29.8 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.
| August 17 Ascending node (full moon) | September 1 Descending node (new moon) | September 15 Ascending node (full moon) |
|---|---|---|
 | |  |
| Penumbral lunar eclipse Lunar Saros 108 | Annular solar eclipse Solar Saros 134 | Penumbral lunar eclipse Lunar Saros 146 |
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]
The partial solar eclipse on July 11, 1953 occurs in the next lunar year eclipse set.
| Solar eclipse series sets from 1950 to 1953 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 119 | March 18, 1950 Annular (non-central) |
0.9988 | 124 | September 12, 1950 Total |
0.8903 | |
| 129 | March 7, 1951 Annular |
−0.242 | 134 | September 1, 1951 Annular |
0.1557 | |
| 139 | February 25, 1952 Total |
0.4697 | 144 | August 20, 1952 Annular |
−0.6102 | |
| 149 | February 14, 1953 Partial |
1.1331 | 154 | August 9, 1953 Partial |
−1.344 | |
This eclipse is a part of Saros series 134, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 22, 1248. It contains total eclipses from October 9, 1428 through December 24, 1554; hybrid eclipses from January 3, 1573 through June 27, 1843; and annular eclipses from July 8, 1861 through May 21, 2384. The series ends at member 72 as a partial eclipse on August 6, 2510. 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 was produced by member 11 at 1 minutes, 30 seconds on October 9, 1428, and the longest duration of annularity will be produced by member 52 at 10 minutes, 55 seconds on January 10, 2168. All eclipses in this series occur at the Moon’s descending node of orbit.[5]
| Series members 32–53 occur between 1801 and 2200: | ||
|---|---|---|
| 32 | 33 | 34 |
 June 6, 1807 |
 June 16, 1825 |
 June 27, 1843 |
| 35 | 36 | 37 |
 July 8, 1861 |
 July 19, 1879 |
 July 29, 1897 |
| 38 | 39 | 40 |
 August 10, 1915 |
 August 21, 1933 |
September 1, 1951 |
| 41 | 42 | 43 |
 September 11, 1969 |
 September 23, 1987 |
 October 3, 2005 |
| 44 | 45 | 46 |
 October 14, 2023 |
 October 25, 2041 |
 November 5, 2059 |
| 47 | 48 | 49 |
 November 15, 2077 |
 November 27, 2095 |
 December 8, 2113 |
| 50 | 51 | 52 |
 December 19, 2131 |
 December 30, 2149 |
 January 10, 2168 |
| 53 | ||
 January 20, 2186 | ||
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 descending node.
| 22 eclipse events between April 8, 1902 and August 31, 1989 | ||||
|---|---|---|---|---|
| April 7–8 | January 24–25 | November 12 | August 31–September 1 | June 19–20 |
| 108 | 110 | 112 | 114 | 116 |
 April 8, 1902 |
 August 31, 1913 |
 June 19, 1917 | ||
| 118 | 120 | 122 | 124 | 126 |
 April 8, 1921 |
 January 24, 1925 |
 November 12, 1928 |
 August 31, 1932 |
 June 19, 1936 |
| 128 | 130 | 132 | 134 | 136 |
 April 7, 1940 |
 January 25, 1944 |
 November 12, 1947 |
September 1, 1951 |
 June 20, 1955 |
| 138 | 140 | 142 | 144 | 146 |
 April 8, 1959 |
 January 25, 1963 |
 November 12, 1966 |
 August 31, 1970 |
 June 20, 1974 |
| 148 | 150 | 152 | 154 | |
 April 7, 1978 |
 January 25, 1982 |
 November 12, 1985 |
 August 31, 1989 | |
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 | ||||
|---|---|---|---|---|
 October 9, 1809 (Saros 121) |
 September 7, 1820 (Saros 122) |
 August 7, 1831 (Saros 123) |
 July 8, 1842 (Saros 124) |
 June 6, 1853 (Saros 125) |
 May 6, 1864 (Saros 126) |
 April 6, 1875 (Saros 127) |
 March 5, 1886 (Saros 128) |
 February 1, 1897 (Saros 129) |
 January 3, 1908 (Saros 130) |
 December 3, 1918 (Saros 131) |
 November 1, 1929 (Saros 132) |
 October 1, 1940 (Saros 133) |
September 1, 1951 (Saros 134) |
 July 31, 1962 (Saros 135) |
 June 30, 1973 (Saros 136) |
 May 30, 1984 (Saros 137) |
 April 29, 1995 (Saros 138) |
 March 29, 2006 (Saros 139) |
 February 26, 2017 (Saros 140) |
 January 26, 2028 (Saros 141) |
 December 26, 2038 (Saros 142) |
 November 25, 2049 (Saros 143) |
 October 24, 2060 (Saros 144) |
 September 23, 2071 (Saros 145) |
 August 24, 2082 (Saros 146) |
 July 23, 2093 (Saros 147) |
 June 22, 2104 (Saros 148) |
 May 24, 2115 (Saros 149) |
 April 22, 2126 (Saros 150) |
 March 21, 2137 (Saros 151) |
 February 19, 2148 (Saros 152) |
 January 19, 2159 (Saros 153) |
 December 18, 2169 (Saros 154) |
 November 17, 2180 (Saros 155) |
 October 18, 2191 (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 | ||
|---|---|---|
 December 10, 1806 (Saros 129) |
 November 20, 1835 (Saros 130) |
 October 30, 1864 (Saros 131) |
 October 9, 1893 (Saros 132) |
 September 21, 1922 (Saros 133) |
September 1, 1951 (Saros 134) |
 August 10, 1980 (Saros 135) |
 July 22, 2009 (Saros 136) |
 July 2, 2038 (Saros 137) |
 June 11, 2067 (Saros 138) |
 May 22, 2096 (Saros 139) |
 May 3, 2125 (Saros 140) |
 April 12, 2154 (Saros 141) |
 March 23, 2183 (Saros 142) |
|
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
