Solar eclipse of March 18, 1950

Last updated
Solar eclipse of March 18, 1950
SE1950Mar18A.png
Map
Type of eclipse
NatureAnnular
Gamma 0.9988
Magnitude 0.962
Maximum eclipse
Duration-
Coordinates 60°54′S40°54′E / 60.9°S 40.9°E / -60.9; 40.9
Max. width of band- km
Times (UTC)
Greatest eclipse15:32:01
References
Saros 119 (62 of 71)
Catalog # (SE5000) 9398

An annular solar eclipse occurred at the Moon's ascending node of orbit on Saturday, March 18, 1950, [1] with a magnitude of 0.962. 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 about 3.8 days before apogee (on March 22, 1950, at 10:50 UTC), the Moon's apparent diameter was smaller. [2]

Contents

It will be unusual in that while it is an annular solar eclipse, it is not a central solar eclipse. A non-central eclipse is one where the center-line of annularity does not intersect the surface of the Earth (when the gamma is between 0.9972 and 1.0260). Instead, the center line passes just above the Earth's surface. This rare type occurs when annularity is only visible at sunset or sunrise in a polar region.

Annularity was visible from a part of Antarctica. A partial eclipse was visible for extreme southern South America, Antarctica, and Southern Africa. This was the last of 54 umbral solar eclipses in Solar Saros 119.

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]

March 18, 1950 Solar Eclipse Times
EventTime (UTC)
First Penumbral External Contact1950 March 18 at 13:11:15.9 UTC
Equatorial Conjunction1950 March 18 at 14:27:07.9 UTC
First Umbral External Contact1950 March 18 at 15:09:02.7 UTC
Ecliptic Conjunction1950 March 18 at 15:20:29.9 UTC
Greatest Eclipse1950 March 18 at 15:32:01.3 UTC
Last Umbral External Contact1950 March 18 at 15:55:41.2 UTC
Last Penumbral External Contact1950 March 18 at 17:53:16.2 UTC
March 18, 1950 Solar Eclipse Parameters
ParameterValue
Eclipse Magnitude0.96198
Eclipse Obscuration-
Gamma−0.99880
Sun Right Ascension23h50m43.1s
Sun Declination-01°00'22.1"
Sun Semi-Diameter16'03.9"
Sun Equatorial Horizontal Parallax08.8"
Moon Right Ascension23h52m29.2s
Moon Declination-01°48'04.0"
Moon Semi-Diameter14'55.6"
Moon Equatorial Horizontal Parallax0°54'47.0"
ΔT29.2 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 March–April 1950
March 18
Ascending node (new moon)		 April 2
Descending node (full moon)
SE1950Mar18A.png Lunar eclipse chart close-1950Apr02.png
Annular solar eclipse
Solar Saros 119		 Total lunar eclipse
Lunar Saros 131

Eclipses in 1950

Metonic

Tzolkinex

Half-Saros

Tritos

Solar Saros 119

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 119

This eclipse is a part of Saros series 119, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on May 15, 850 AD. It contains total eclipses on August 9, 994 AD and August 20, 1012; a hybrid eclipse on August 31, 1030; and annular eclipses from September 10, 1048 through March 18, 1950. The series ends at member 71 as a partial eclipse on June 24, 2112. 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 10 at 32 seconds on August 20, 1012, and the longest duration of annularity was produced by member 44 at 7 minutes, 37 seconds on September 1, 1625. All eclipses in this series occur at the Moon’s ascending node of orbit. [5]

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 January 5, 1935 and August 11, 2018
January 4–5October 23–24August 10–12May 30–31March 18–19
111113115117119
SE1935Jan05P.png
January 5, 1935 		SE1942Aug12P.png
August 12, 1942 		SE1946May30P.png
May 30, 1946 		SE1950Mar18A.png
March 18, 1950
121123125127129
SE1954Jan05A.png
January 5, 1954 		SE1957Oct23T.png
October 23, 1957 		SE1961Aug11A.png
August 11, 1961 		SE1965May30T.png
May 30, 1965 		SE1969Mar18A.png
March 18, 1969
131133135137139
SE1973Jan04A.png
January 4, 1973 		SE1976Oct23T.png
October 23, 1976 		SE1980Aug10A.png
August 10, 1980 		SE1984May30A.png
May 30, 1984 		SE1988Mar18T.png
March 18, 1988
141143145147149
SE1992Jan04A.png
January 4, 1992 		SE1995Oct24T.png
October 24, 1995 		SE1999Aug11T.png
August 11, 1999 		SE2003May31A.png
May 31, 2003 		SE2007Mar19P.png
March 19, 2007
151153155
SE2011Jan04P.png
January 4, 2011 		SE2014Oct23P.png
October 23, 2014 		SE2018Aug11P.png
August 11, 2018

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
SE1819Mar25P.gif
March 25, 1819
(Saros 107)		 SE1830Feb23P.gif
February 23, 1830
(Saros 108)		 SE1841Jan22P.gif
January 22, 1841
(Saros 109)		 SE1862Nov21P.gif
November 21, 1862
(Saros 111)
SE1895Aug20P.gif
August 20, 1895
(Saros 114)		 SE1906Jul21P.png
July 21, 1906
(Saros 115)		 SE1917Jun19P.png
June 19, 1917
(Saros 116)
SE1928May19T.png
May 19, 1928
(Saros 117)		 SE1939Apr19A.png
April 19, 1939
(Saros 118)		 SE1950Mar18A.png
March 18, 1950
(Saros 119)		 SE1961Feb15T.png
February 15, 1961
(Saros 120)		 SE1972Jan16A.png
January 16, 1972
(Saros 121)
SE1982Dec15P.png
December 15, 1982
(Saros 122)		 SE1993Nov13P.png
November 13, 1993
(Saros 123)		 SE2004Oct14P.png
October 14, 2004
(Saros 124)		 SE2015Sep13P.png
September 13, 2015
(Saros 125)		 SE2026Aug12T.png
August 12, 2026
(Saros 126)
SE2037Jul13T.png
July 13, 2037
(Saros 127)		 SE2048Jun11A.png
June 11, 2048
(Saros 128)		 SE2059May11T.png
May 11, 2059
(Saros 129)		 SE2070Apr11T.png
April 11, 2070
(Saros 130)		 SE2081Mar10A.png
March 10, 2081
(Saros 131)
SE2092Feb07A.png
February 7, 2092
(Saros 132)		 SE2103Jan08T.png
January 8, 2103
(Saros 133)		 SE2113Dec08A.png
December 8, 2113
(Saros 134)		 SE2124Nov06A.png
November 6, 2124
(Saros 135)		 SE2135Oct07T.png
October 7, 2135
(Saros 136)
SE2146Sep06A.png
September 6, 2146
(Saros 137)		 SE2157Aug05A.png
August 5, 2157
(Saros 138)		 SE2168Jul05T.png
July 5, 2168
(Saros 139)		 SE2179Jun05A.png
June 5, 2179
(Saros 140)		 SE2190May04A.png
May 4, 2190
(Saros 141)

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
SE1805Jun26P.gif
June 26, 1805
(Saros 114)		 SE1834Jun07P.gif
June 7, 1834
(Saros 115)		 SE1863May17P.gif
May 17, 1863
(Saros 116)
SE1892Apr26T.png
April 26, 1892
(Saros 117)		 SE1921Apr08A.png
April 8, 1921
(Saros 118)		 SE1950Mar18A.png
March 18, 1950
(Saros 119)
SE1979Feb26T.png
February 26, 1979
(Saros 120)		 SE2008Feb07A.png
February 7, 2008
(Saros 121)		 SE2037Jan16P.png
January 16, 2037
(Saros 122)
SE2065Dec27P.png
December 27, 2065
(Saros 123)		 SE2094Dec07P.png
December 7, 2094
(Saros 124)		 Saros125 60van73 SE2123Nov18P.jpg
November 18, 2123
(Saros 125)
Saros126 55van72 SE2152Oct28P.jpg
October 28, 2152
(Saros 126)		 Saros127 67van82 SE2181Oct08P.jpg
October 8, 2181
(Saros 127)

Notes

  1. ↑ "March 18, 1950 Annular Solar Eclipse". timeanddate. Retrieved 4 August 2024.
  2. ↑ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 4 August 2024.
  3. ↑ "Annular Solar Eclipse of 1950 Mar 18". 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 119". eclipse.gsfc.nasa.gov.

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References

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