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Solar eclipse of June 29, 1946

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Solar eclipse of June 29, 1946
Map
Type of eclipse
NaturePartial
Gamma1.4361
Magnitude0.1802
Maximum eclipse
Coordinates66°36′N 50°48′W / 66.6°N 50.8°W / 66.6; -50.8
Times (UTC)
Greatest eclipse3:51:58
References
Saros155 (2 of 71)
Catalog # (SE5000)9389

A partial solar eclipse occurred at the Moon's ascending node of orbit on Saturday, June 29, 1946,[1] with a magnitude of 0.1802. 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 third of four partial solar eclipses in 1946, with the others occurring on January 3, May 30, and November 23.

A partial eclipse was visible for parts of Northern Europe, Greenland, and Canada.

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.[2]

June 29, 1946 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 1946 June 29 at 02:57:15.1 UTC
Greatest Eclipse 1946 June 29 at 03:51:57.7 UTC
Equatorial Conjunction 1946 June 29 at 03:58:28.2 UTC
Ecliptic Conjunction 1946 June 29 at 04:06:09.4 UTC
Last Penumbral External Contact 1946 June 29 at 04:46:39.5 UTC
June 29, 1946 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 0.18018
Eclipse Obscuration 0.09049
Gamma 1.43612
Sun Right Ascension 06h29m37.9s
Sun Declination +23°16'18.2"
Sun Semi-Diameter 15'43.9"
Sun Equatorial Horizontal Parallax 08.6"
Moon Right Ascension 06h29m21.1s
Moon Declination +24°43'20.8"
Moon Semi-Diameter 16'34.1"
Moon Equatorial Horizontal Parallax 1°00'48.5"
ΔT 27.5 s

Eclipse season

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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.

Eclipse season of May–June 1946
May 30
Ascending node (new moon)
June 14
Descending node (full moon)
June 29
Ascending node (new moon)
Partial solar eclipse
Solar Saros 117
Total lunar eclipse
Lunar Saros 129
Partial solar eclipse
Solar Saros 155
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Eclipses in 1946

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Metonic

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Tzolkinex

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Tritos

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Solar Saros 155

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Inex

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Triad

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Solar eclipses of 1942–1946

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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.[3]

The partial solar eclipses on March 16, 1942 and September 10, 1942 occur in the previous lunar year eclipse set, and the partial solar eclipses on May 30, 1946 and November 23, 1946 occur in the next lunar year eclipse set.

Solar eclipse series sets from 1942 to 1946
Ascending node   Descending node
Saros Map Gamma Saros Map Gamma
115 August 12, 1942

Partial
−1.5244 120 February 4, 1943

Total
0.8734
125 August 1, 1943

Annular
−0.8041 130 January 25, 1944

Total
0.2025
135 July 20, 1944

Annular
−0.0314 140 January 14, 1945

Annular
−0.4937
145 July 9, 1945

Total
0.7356 150 January 3, 1946

Partial
−1.2392
155 June 29, 1946

Partial
1.4361

Saros 155

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This eclipse is a part of Saros series 155, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 17, 1928. It contains total eclipses from September 12, 2072 through August 30, 2649; hybrid eclipses from September 10, 2667 through October 2, 2703; and annular eclipses from October 13, 2721 through May 8, 3064. The series ends at member 71 as a partial eclipse on July 24, 3190. 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 14 at 4 minutes, 5 seconds on November 6, 2162, and the longest duration of annularity will be produced by member 63 at 5 minutes, 31 seconds on April 28, 3046. All eclipses in this series occur at the Moon’s ascending node of orbit.[4]

Series members 1–16 occur between 1928 and 2200:
1 2 3

June 17, 1928

June 29, 1946

July 9, 1964
4 5 6

July 20, 1982

July 31, 2000

August 11, 2018
7 8 9

August 21, 2036

September 2, 2054

September 12, 2072
10 11 12

September 23, 2090

October 5, 2108

October 16, 2126
13 14 15

October 26, 2144

November 7, 2162

November 17, 2180
16

November 28, 2198

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 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

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 1946

August 5, 1804
(Saros 142)

July 6, 1815
(Saros 143)

June 5, 1826
(Saros 144)

May 4, 1837
(Saros 145)

April 3, 1848
(Saros 146)

March 4, 1859
(Saros 147)

January 31, 1870
(Saros 148)

December 31, 1880
(Saros 149)

December 1, 1891
(Saros 150)

October 31, 1902
(Saros 151)

September 30, 1913
(Saros 152)

August 30, 1924
(Saros 153)

July 30, 1935
(Saros 154)

June 29, 1946
(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 1946

October 7, 1801
(Saros 150)

September 17, 1830
(Saros 151)

August 28, 1859
(Saros 152)

August 7, 1888
(Saros 153)

July 19, 1917
(Saros 154)

June 29, 1946
(Saros 155)

References

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  1. ^ "June 29, 1946 Partial Solar Eclipse". timeanddate. Retrieved 4 August 2024.
  2. ^ "Partial Solar Eclipse of 1946 Jun 29". EclipseWise.com. Retrieved 4 August 2024.
  3. ^ 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.
  4. ^ "NASA - Catalog of Solar Eclipses of Saros 155". eclipse.gsfc.nasa.gov.
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