Wikipedia

Solar eclipse of November 12, 1947

An annular solar eclipse occurred at the Moon's descending node of orbit on Wednesday, November 12, 1947,[1] with a magnitude of 0.965. 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 6.1 days before apogee (on November 18, 1947, at 23:30 UTC), the Moon's apparent diameter was smaller.[2]

Solar eclipse of November 12, 1947
Map
Type of eclipse
NatureAnnular
Gamma0.3743
Magnitude0.965
Maximum eclipse
Duration239 s (3 min 59 s)
Coordinates3°00′N 117°24′W / 3°N 117.4°W / 3; -117.4
Max. width of band135 km (84 mi)
Times (UTC)
Greatest eclipse20:05:37
References
Saros132 (42 of 71)
Catalog # (SE5000)9393

Annularity was visible from the Pacific Ocean, Peru, Ecuador, Colombia and Brazil. A partial eclipse was visible for parts of Hawaii, North America, Central America, the Caribbean, and western South America.

Eclipse details

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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]

November 12, 1947 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1947 November 12 at 17:14:24.4 UTC
First Umbral External Contact 1947 November 12 at 18:19:10.8 UTC
First Central Line 1947 November 12 at 18:20:53.4 UTC
First Umbral Internal Contact 1947 November 12 at 18:22:36.3 UTC
First Penumbral Internal Contact 1947 November 12 at 19:40:11.0 UTC
Equatorial Conjunction 1947 November 12 at 19:49:00.8 UTC
Ecliptic Conjunction 1947 November 12 at 20:01:22.9 UTC
Greatest Eclipse 1947 November 12 at 20:05:36.6 UTC
Last Penumbral Internal Contact 1947 November 12 at 20:31:25.1 UTC
Greatest Duration 1947 November 12 at 20:36:27.8 UTC
Last Umbral Internal Contact 1947 November 12 at 21:48:45.3 UTC
Last Central Line 1947 November 12 at 21:50:31.0 UTC
Last Umbral External Contact 1947 November 12 at 21:52:16.5 UTC
Last Penumbral External Contact 1947 November 12 at 22:57:02.2 UTC
November 12, 1947 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.96505
Eclipse Obscuration 0.93132
Gamma 0.37431
Sun Right Ascension 15h08m34.6s
Sun Declination -17°38'16.9"
Sun Semi-Diameter 16'09.7"
Sun Equatorial Horizontal Parallax 08.9"
Moon Right Ascension 15h09m06.8s
Moon Declination -17°18'40.3"
Moon Semi-Diameter 15'22.3"
Moon Equatorial Horizontal Parallax 0°56'24.7"
ΔT 28.2 s

Eclipse season

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See also: Eclipse cycle

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 November 1947
November 12
Descending node (new moon)		 November 28
Ascending node (full moon)
   
Annular solar eclipse
Solar Saros 132		 Penumbral lunar eclipse
Lunar Saros 144
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Eclipses in 1947

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 132

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Inex

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Triad

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Solar eclipses of 1946–1949

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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 eclipses on January 3, 1946 and June 29, 1946 occur in the previous lunar year eclipse set.

Solar eclipse series sets from 1946 to 1949
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
117 May 30, 1946
 
Partial 		−1.0711 122 November 23, 1946
 
Partial 		1.105
127 May 20, 1947
 
Total 		−0.3528 132 November 12, 1947
 
Annular 		0.3743
137 May 9, 1948
 
Annular 		0.4133 142 November 1, 1948
 
Total 		−0.3517
147 April 28, 1949
 
Partial 		1.2068 152 October 21, 1949
 
Partial 		−1.027

Saros 132

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This eclipse is a part of Saros series 132, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on August 13, 1208. It contains annular eclipses from March 17, 1569 through March 12, 2146; hybrid eclipses on March 23, 2164 and April 3, 2182; and total eclipses from April 14, 2200 through June 19, 2308. The series ends at member 71 as a partial eclipse on September 25, 2470. 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 annularity was produced by member 25 at 6 minutes, 56 seconds on May 9, 1641, and the longest duration of totality will be produced by member 61 at 2 minutes, 14 seconds on June 8, 2290. All eclipses in this series occur at the Moon’s descending node of orbit.[5]

Series members 34–56 occur between 1801 and 2200:
34 35 36
 
August 17, 1803 		 
August 27, 1821 		 
September 7, 1839
37 38 39
 
September 18, 1857 		 
September 29, 1875 		 
October 9, 1893
40 41 42
 
October 22, 1911 		 
November 1, 1929 		 
November 12, 1947
43 44 45
 
November 23, 1965 		 
December 4, 1983 		 
December 14, 2001
46 47 48
 
December 26, 2019 		 
January 5, 2038 		 
January 16, 2056
49 50 51
 
January 27, 2074 		 
February 7, 2092 		 
February 18, 2110
52 53 54
 
March 1, 2128 		 
March 12, 2146 		 
March 23, 2164
55 56
 
April 3, 2182 		 
April 14, 2200

Metonic series

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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

Tritos series

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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
 
December 21, 1805
(Saros 119) 		 
November 19, 1816
(Saros 120) 		 
October 20, 1827
(Saros 121) 		 
September 18, 1838
(Saros 122) 		 
August 18, 1849
(Saros 123)
 
July 18, 1860
(Saros 124) 		 
June 18, 1871
(Saros 125) 		 
May 17, 1882
(Saros 126) 		 
April 16, 1893
(Saros 127) 		 
March 17, 1904
(Saros 128)
 
February 14, 1915
(Saros 129) 		 
January 14, 1926
(Saros 130) 		 
December 13, 1936
(Saros 131) 		 
November 12, 1947
(Saros 132) 		 
October 12, 1958
(Saros 133)
 
September 11, 1969
(Saros 134) 		 
August 10, 1980
(Saros 135) 		 
July 11, 1991
(Saros 136) 		 
June 10, 2002
(Saros 137) 		 
May 10, 2013
(Saros 138)
 
April 8, 2024
(Saros 139) 		 
March 9, 2035
(Saros 140) 		 
February 5, 2046
(Saros 141) 		 
January 5, 2057
(Saros 142) 		 
December 6, 2067
(Saros 143)
 
November 4, 2078
(Saros 144) 		 
October 4, 2089
(Saros 145) 		 
September 4, 2100
(Saros 146) 		 
August 4, 2111
(Saros 147) 		 
July 4, 2122
(Saros 148)
 
June 3, 2133
(Saros 149) 		 
May 3, 2144
(Saros 150) 		 
April 2, 2155
(Saros 151) 		 
March 2, 2166
(Saros 152) 		 
January 29, 2177
(Saros 153)
 
December 29, 2187
(Saros 154) 		 
November 28, 2198
(Saros 155)

Inex series

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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
 
February 21, 1803
(Saros 127) 		 
February 1, 1832
(Saros 128) 		 
January 11, 1861
(Saros 129)
 
December 22, 1889
(Saros 130) 		 
December 3, 1918
(Saros 131) 		 
November 12, 1947
(Saros 132)
 
October 23, 1976
(Saros 133) 		 
October 3, 2005
(Saros 134) 		 
September 12, 2034
(Saros 135)
 
August 24, 2063
(Saros 136) 		 
August 3, 2092
(Saros 137) 		 
July 14, 2121
(Saros 138)
 
June 25, 2150
(Saros 139) 		 
June 5, 2179
(Saros 140)

Notes

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  1. ^ "November 12, 1947 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 1947 Nov 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 132". eclipse.gsfc.nasa.gov.

References

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