Solar eclipse of July 20, 1925

Last updated
Solar eclipse of July 20, 1925
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Map
Type of eclipse
NatureAnnular
Gamma -0.7193
Magnitude 0.9436
Maximum eclipse
Duration435 sec (7 m 15 s)
Coordinates 25°18′S150°00′W / 25.3°S 150°W / -25.3; -150
Max. width of band300 km (190 mi)
Times (UTC)
Greatest eclipse21:48:42
References
Saros 125 (49 of 73)
Catalog # (SE5000) 9340

An annular solar eclipse occurred on July 20, 1925. 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. Annularity was visible from northern part of Northland Region and the whole Kermadec Islands in New Zealand on July 21st (Tuesday), and Rapa Iti in French Polynesia on July 20th (Monday).

Contents

Solar eclipses 1924–1928

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. [1]

Solar eclipse series sets from 1924–1928
Ascending node Descending node
115 July 31, 1924
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Partial
120 January 24, 1925
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Total
125 July 20, 1925
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Annular
130 January 14, 1926
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Total
135 July 9, 1926
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Annular
140 January 3, 1927
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Annular
145 June 29, 1927
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Total
150 December 24, 1927
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Partial
155 June 17, 1928
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Partial

Saros 125

Solar saros 125, repeating every about 18 years and 11 days, contains 73 events. The series started with a partial solar eclipse on February 4, 1060. It has total eclipses from June 13, 1276, to July 16, 1330. It has hybrid eclipses on July 26, 1348, and August 7, 1366, and annular eclipses from August 17, 1384, to August 22, 1979. The series ends at member 73 as a partial eclipse on April 9, 2358. The longest total eclipse occurred on June 25, 1294, at 1 minute and 11 seconds; the longest annular eclipse occurred on July 10, 1907, at 7 minutes and 23 seconds. [2]

Series members 47–58 occur between 1881 and 2100:
474849
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June 28, 1889
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July 10, 1907
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July 20, 1925
505152
SE1943Aug01A.png
August 1, 1943
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August 11, 1961
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August 22, 1979
535455
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September 2, 1997
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September 13, 2015
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September 23, 2033
565758
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October 4, 2051
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October 15, 2069
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October 26, 2087

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.

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.

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).

Notes

  1. 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.
  2. Saros Series Catalog of Solar Eclipses NASA Eclipse Web Site.

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References