Solar eclipse of September 12, 1950

Last updated
Solar eclipse of September 12, 1950
SE1950Sep12T.png
Map
Type of eclipse
NatureTotal
Gamma 0.8903
Magnitude 1.0182
Maximum eclipse
Duration74 s (1 min 14 s)
Coordinates 54°48′N172°18′E / 54.8°N 172.3°E / 54.8; 172.3
Max. width of band134 km (83 mi)
Times (UTC)
Greatest eclipse3:38:47
References
Saros 124 (51 of 73)
Catalog # (SE5000) 9399

A total solar eclipse occurred at the Moon's descending node of orbit between Monday, September 11, 1950 and Tuesday, September 12, 1950, [1] with a magnitude of 1.0182. 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 3.2 days before perigee (on September 15, 1950, at 8:20 UTC), the Moon's apparent diameter was larger. [2]

Contents

Totality was visible from eastern Soviet Union (today's Russia) on September 12 local time and the whole Semichi Islands in Alaska on September 11 local time. A partial eclipse was visible for parts of Northeast Asia, Alaska, Hawaii, and northwest Canada.

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. [3]

September 12, 1950 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1950 September 12 at 01:23:43.1 UTC
Equatorial Conjunction1950 September 12 at 02:46:30.5 UTC
First Umbral External Contact1950 September 12 at 02:50:01.6 UTC
First Central Line1950 September 12 at 02:50:40.3 UTC
First Umbral Internal Contact1950 September 12 at 02:51:19.4 UTC
Ecliptic Conjunction1950 September 12 at 03:29:21.7 UTC
Greatest Eclipse1950 September 12 at 03:38:46.9 UTC
Greatest Duration1950 September 12 at 03:40:16.3 UTC
Last Umbral Internal Contact1950 September 12 at 04:26:44.1 UTC
Last Central Line1950 September 12 at 04:27:25.6 UTC
Last Umbral External Contact1950 September 12 at 04:28:06.7 UTC
Last Penumbral External Contact1950 September 12 at 05:54:06.6 UTC
September 12, 1950 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude1.01818
Eclipse Obscuration1.03668
Gamma0.89030
Sun Right Ascension11h18m51.6s
Sun Declination+04°25'42.1"
Sun Semi-Diameter15'53.5"
Sun Equatorial Horizontal Parallax08.7"
Moon Right Ascension11h20m32.5s
Moon Declination+05°11'38.3"
Moon Semi-Diameter16'04.0"
Moon Equatorial Horizontal Parallax0°58'57.9"
ΔT29.4 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.

Eclipse season of September 1950
September 12
Descending node (new moon)		 September 26
Ascending node (full moon)
SE1950Sep12T.png Lunar eclipse chart close-1950Sep26.png
Total solar eclipse
Solar Saros 124		 Total lunar eclipse
Lunar Saros 136

Eclipses in 1950

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 124

Inex

Triad

Solar eclipses of 1950–1953

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
SarosMapGammaSarosMapGamma
119 March 18, 1950
SE1950Mar18A.png
Annular (non-central)		0.9988124 September 12, 1950
SE1950Sep12T.png
Total		0.8903
129 March 7, 1951
SE1951Mar07A.png
Annular		−0.242134 September 1, 1951
SE1951Sep01A.png
Annular		0.1557
139 February 25, 1952
SE1952Feb25T.png
Total		0.4697144 August 20, 1952
SE1952Aug20A.png
Annular		−0.6102
149 February 14, 1953
SE1953Feb14P.png
Partial		1.1331154 August 9, 1953
SE1953Aug09P.png
Partial		−1.344

Saros 124

This eclipse is a part of Saros series 124, repeating every 18 years, 11 days, and containing 73 events. The series started with a partial solar eclipse on March 6, 1049. It contains total eclipses from June 12, 1211 through September 22, 1968, and a hybrid eclipse on October 3, 1986. There are no annular eclipses in this set. The series ends at member 73 as a partial eclipse on May 11, 2347. 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 39 at 5 minutes, 46 seconds on May 3, 1734. All eclipses in this series occur at the Moon’s descending node of orbit. [5]

Series members 43–64 occur between 1801 and 2200:
434445
SE1806Jun16T.png
June 16, 1806 		SE1824Jun26T.png
June 26, 1824 		SE1842Jul08T.png
July 8, 1842
464748
SE1860Jul18T.png
July 18, 1860 		SE1878Jul29T.png
July 29, 1878 		SE1896Aug09T.png
August 9, 1896
495051
SE1914Aug21T.png
August 21, 1914 		SE1932Aug31T.png
August 31, 1932 		SE1950Sep12T.png
September 12, 1950
525354
SE1968Sep22T.png
September 22, 1968 		SE1986Oct03H.png
October 3, 1986 		SE2004Oct14P.png
October 14, 2004
555657
SE2022Oct25P.png
October 25, 2022 		SE2040Nov04P.png
November 4, 2040 		SE2058Nov16P.png
November 16, 2058
585960
SE2076Nov26P.png
November 26, 2076 		SE2094Dec07P.png
December 7, 2094 		Saros124 60van73 SE2112Dec19P.jpg
December 19, 2112
616263
Saros124 61van73 SE2130Dec30P.jpg
December 30, 2130		 Saros124 62van73 SE2149Jan09P.jpg
January 9, 2149		 Saros124 63van73 SE2167Jan21P.jpg
January 21, 2167
64
Saros124 64van73 SE2185Jan31P.jpg
January 31, 2185

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 descending node.

22 eclipse events between September 12, 1931 and July 1, 2011
September 11–12June 30–July 1April 17–19February 4–5November 22–23
114116118120122
SE1931Sep12P.png
September 12, 1931 		SE1935Jun30P.png
June 30, 1935 		SE1939Apr19A.png
April 19, 1939 		SE1943Feb04T.png
February 4, 1943 		SE1946Nov23P.png
November 23, 1946
124126128130132
SE1950Sep12T.png
September 12, 1950 		SE1954Jun30T.png
June 30, 1954 		SE1958Apr19A.png
April 19, 1958 		SE1962Feb05T.png
February 5, 1962 		SE1965Nov23A.png
November 23, 1965
134136138140142
SE1969Sep11A.png
September 11, 1969 		SE1973Jun30T.png
June 30, 1973 		SE1977Apr18A.png
April 18, 1977 		SE1981Feb04A.png
February 4, 1981 		SE1984Nov22T.png
November 22, 1984
144146148150152
SE1988Sep11A.png
September 11, 1988 		SE1992Jun30T.png
June 30, 1992 		SE1996Apr17P.png
April 17, 1996 		SE2000Feb05P.png
February 5, 2000 		SE2003Nov23T.png
November 23, 2003
154156
SE2007Sep11P.png
September 11, 2007 		SE2011Jul01P.png
July 1, 2011

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
SE1808Oct19P.gif
October 19, 1808
(Saros 111)		 SE1819Sep19Pe.gif
September 19, 1819
(Saros 112)		 SE1830Aug18P.gif
August 18, 1830
(Saros 113)		 SE1841Jul18P.gif
July 18, 1841
(Saros 114)		 SE1852Jun17P.gif
June 17, 1852
(Saros 115)
SE1863May17P.gif
May 17, 1863
(Saros 116)		 SE1874Apr16T.png
April 16, 1874
(Saros 117)		 SE1885Mar16A.gif
March 16, 1885
(Saros 118)		 SE1896Feb13A.png
February 13, 1896
(Saros 119)		 SE1907Jan14T.png
January 14, 1907
(Saros 120)
SE1917Dec14A.png
December 14, 1917
(Saros 121)		 SE1928Nov12P.png
November 12, 1928
(Saros 122)		 SE1939Oct12T.png
October 12, 1939
(Saros 123)		 SE1950Sep12T.png
September 12, 1950
(Saros 124)		 SE1961Aug11A.png
August 11, 1961
(Saros 125)
SE1972Jul10T.png
July 10, 1972
(Saros 126)		 SE1983Jun11T.png
June 11, 1983
(Saros 127)		 SE1994May10A.png
May 10, 1994
(Saros 128)		 SE2005Apr08H.png
April 8, 2005
(Saros 129)		 SE2016Mar09T.png
March 9, 2016
(Saros 130)
SE2027Feb06A.png
February 6, 2027
(Saros 131)		 SE2038Jan05A.png
January 5, 2038
(Saros 132)		 SE2048Dec05T.png
December 5, 2048
(Saros 133)		 SE2059Nov05A.png
November 5, 2059
(Saros 134)		 SE2070Oct04A.png
October 4, 2070
(Saros 135)
SE2081Sep03T.png
September 3, 2081
(Saros 136)		 SE2092Aug03A.png
August 3, 2092
(Saros 137)		 SE2103Jul04A.png
July 4, 2103
(Saros 138)		 SE2114Jun03T.png
June 3, 2114
(Saros 139)		 SE2125May03A.png
May 3, 2125
(Saros 140)
SE2136Apr01A.png
April 1, 2136
(Saros 141)		 SE2147Mar02T.png
March 2, 2147
(Saros 142)		 SE2158Jan30A.png
January 30, 2158
(Saros 143)		 SE2168Dec29A.png
December 29, 2168
(Saros 144)		 SE2179Nov28T.png
November 28, 2179
(Saros 145)
SE2190Oct29H.png
October 29, 2190
(Saros 146)

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
SE1805Dec21A.gif
December 21, 1805
(Saros 119)		 SE1834Nov30T.gif
November 30, 1834
(Saros 120)		 SE1863Nov11A.png
November 11, 1863
(Saros 121)
SE1892Oct20P.gif
October 20, 1892
(Saros 122)		 SE1921Oct01T.png
October 1, 1921
(Saros 123)		 SE1950Sep12T.png
September 12, 1950
(Saros 124)
SE1979Aug22A.png
August 22, 1979
(Saros 125)		 SE2008Aug01T.png
August 1, 2008
(Saros 126)		 SE2037Jul13T.png
July 13, 2037
(Saros 127)
SE2066Jun22A.png
June 22, 2066
(Saros 128)		 SE2095Jun02T.png
June 2, 2095
(Saros 129)		 SE2124May14T.png
May 14, 2124
(Saros 130)
SE2153Apr23A.png
April 23, 2153
(Saros 131)		 SE2182Apr03H.png
April 3, 2182
(Saros 132)

Notes

  1. ↑ "September 12, 1950 Total Solar Eclipse". timeanddate. Retrieved 4 August 2024.
  2. ↑ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 4 August 2024.
  3. ↑ "Total Solar Eclipse of 1950 Sep 12". EclipseWise.com. Retrieved 4 August 2024.
  4. ↑ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  5. ↑ "NASA - Catalog of Solar Eclipses of Saros 124". eclipse.gsfc.nasa.gov.

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References

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