Solar eclipse of July 9, 1945

Last updated
Solar eclipse of July 9, 1945
SE1945Jul09T.png
Map
Type of eclipse
NatureTotal
Gamma 0.7356
Magnitude 1.018
Maximum eclipse
Duration75 s (1 min 15 s)
Coordinates 70°00′N17°12′W / 70°N 17.2°W / 70; -17.2
Max. width of band92 km (57 mi)
Times (UTC)
Greatest eclipse13:27:46
References
Saros 145 (18 of 77)
Catalog # (SE5000) 9387

A total solar eclipse occurred on July 9, 1945. 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. The path of totality crossed northern North America, across Greenland and into Scandinavia, the western Soviet Union, and central Asia.

Contents

The eclipse was mostly seen on July 9, 1945, except for northeastern Soviet Union, where a partial eclipse was seen on July 10 local time, or starting on July 9, passing midnight and ending on July 10 due to the midnight sun.

Observation

Princeton University sent a team to observe the total eclipse southeast of Malta, Montana. The sun happened to appear from a gap in the clouds around the second contact (the beginning of the total phase). The total phase was not affected by the clouds afterwards, but clouds gradually moved closer to the sun, and blocking the sun during the partial phase after the total phase ended. Nobody saw Baily's beads, prominences or shadow bands there. The team from the Franklin Institute and University of Pennsylvania in Philadelphia went to Wolseley, Saskatchewan, Canada. The weather condition was clear before sunrise, with only some thin clouds near the horizon. The sun passed through a series of clouds after sunrise, and the weather kept good since then. The observation was successful. The team from the Yerkes Observatory, Wisconsin observed the eclipse in Pine River in southwestern Manitoba, Canada. The eclipse occurred on the morning of July 9. The eastern sky was covered with clouds at sunrise. The sun came out from the clouds 25 minutes before totality, and half an hour later the entire sky was covered with clouds again. Because the local duration of totality was only 37 seconds, the team took small- and large-scale images of the corona at the same time in order to completely record the data, to study the characteristics of both the outer and inner corona. Since the eclipse occurred less than 2 months after the end of the European theatre of World War II, only a few Swedish teams, one Danish team and one French team managed to observe it from Scandinavia. Another small Norwegian team and some other teams in the Soviet Union did not make observations successfully due to the clouds. Among them, teams from the Stockholm Observatory, Sweden and Paris Observatory, France observed it in Brattås, Västerbotten, Sweden, and photographed the corona and spectra [1] .

Solar eclipses 1942–1946

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. [2]

Note: The partial solar eclipse on September 10, 1942 occurs in the previous lunar year eclipse set.

Solar eclipse series sets from 1942 to 1946
Ascending node Descending node
115 August 12, 1942
SE1942Aug12P.png
Partial
120 February 4, 1943
SE1943Feb04T.png
Total
125 August 1, 1943
SE1943Aug01A.png
Annular
130 January 25, 1944
SE1944Jan25T.png
Total
135 July 20, 1944
SE1944Jul20A.png
Annular
140 January 14, 1945
SE1945Jan14A.png
Annular
145 July 9, 1945
1945Jul09T.png
Total
150 January 3, 1946
SE1946Jan03P.png
Partial
155 June 29, 1946
SE1946Jun29P.png
Partial

Saros 145

This solar eclipse is a part of Saros cycle 145, repeating every 18 years, 11 days, 8 hours, containing 77 events. The series started with a partial solar eclipse on January 4, 1639, and reached a first annular eclipse on June 6, 1891. It was a hybrid event on June 17, 1909, and total eclipses from June 29, 1927, through September 9, 2648. The series ends at member 77 as a partial eclipse on April 17, 3009. The longest eclipse will occur on June 25, 2522, with a maximum duration of totality of 7 minutes, 12 seconds. All eclipses in this series occurs at the Moon's ascending node.

Series members 10–32 occur between 1801 and 2359
101112
SE1801Apr13P.png
April 13, 1801
SE1819Apr24P.png
April 24, 1819
SE1837May04P.png
May 4, 1837
131415
SE1855May16P.png
May 16, 1855
SE1873May26P.png
May 26, 1873
SE1891Jun06A.png
June 6, 1891
161718
SE1909Jun17H.png
June 17, 1909
SE1927Jun29T.png
June 29, 1927
1945Jul09T.png
July 9, 1945
192021
SE1963Jul20T.png
July 20, 1963
SE1981Jul31T.png
July 31, 1981
SE1999Aug11T.png
August 11, 1999
222324
SE2017Aug21T.png
August 21, 2017
SE2035Sep02T.png
September 2, 2035
SE2053Sep12T.png
September 12, 2053
252627
SE2071Sep23T.png
September 23, 2071
SE2089Oct04T.png
October 4, 2089
SE2107Oct16T.png
October 16, 2107
282930
SE2125Oct26T.png
October 26, 2125
SE2143Nov07T.png
November 7, 2143
SE2161Nov17T.png
November 17, 2161
313233
SE2179Nov28T.png
November 28, 2179
SE2197Dec09T.png
December 9, 2197
SE2215Dec21T.png
December 21, 2215
343536
SE2233Dec31T.png
December 31, 2233
SE2252Jan12T.png
January 12, 2252
SE2270Jan22T.png
January 22, 2270
373839
SE2288Feb02T.png
February 2, 2288
SE2306Feb14T.png
February 14, 2306
SE2324Feb25T.png
February 25, 2324
40
SE2342Mar08T.png
March 8, 2342

Notes

  1. Xavier M. Jubier. "Eclipse totale de Soleil du 9 juillet 1945 depuis le nord-ouest des États-Unis, le centre du Canada ou la Suède (Total Solar Eclipse of 1945 July 9 in northwestern USA, central Canada or Sweden)". Archived from the original on 26 October 2016.
  2. 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.

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References