Solar eclipse of September 21, 1922

Solar eclipse of September 21, 1922
Map
Type of eclipse
Nature	Total
Gamma	-0.213
Magnitude	1.0678
Maximum eclipse
Duration	359 sec (5 m 59 s)
Coordinates	10°42′S 104°30′E / 10.7°S 104.5°E
Max. width of band	226 km (140 mi)
Times (UTC)
Greatest eclipse	4:40:31
References
Saros	133 (40 of 72)
Catalog # (SE5000)	9333

A total solar eclipse occurred on September 21, 1922. 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.

This eclipse started in Africa and covered the whole Indian Ocean and Australia. Two large scientific expeditions investigated Einstein's theory of relativity.^[1]

Related eclipses

Solar eclipses 1921-1924

Each member 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.

Solar eclipse series sets from 1921-1924

Descending node			Ascending node
118	April 8, 1921 Annular		123	October 1, 1921 Total
128	March 28, 1922 Annular		133	September 21, 1922 Total
138	March 17, 1923 Annular		143	September 10, 1923 Total
148	March 5, 1924 Partial		153	August 30, 1924 Partial

Saros 133

Solar Saros 133, repeating every 18 years, 11 days, contains 72 events. The series started with a partial solar eclipse on July 13, 1219. It contains annular eclipses from November 20, 1435, through January 13, 1526, with a hybrid eclipse on January 24, 1544. It has total eclipses from February 3, 1562, through June 21, 2373. The series ends at member 72 as a partial eclipse on September 5, 2499. The longest duration of totality was 6 minutes, 50 seconds on August 7, 1850.^[2] The total eclipses of this saros series are getting shorter and farther south with each iteration.

Series members 30-49 occur between 1742 and 2100
30	31	32
June 3, 1742	June 13, 1760	June 24, 1778
33	34	35
July 4, 1796	July 17, 1814	July 27, 1832
36	37	38
August 7, 1850	August 18, 1868	August 29, 1886
39	40	41
September 9, 1904	September 21, 1922	October 1, 1940
42	43	44
October 12, 1958	October 23, 1976	November 3, 1994
45	46	47
November 13, 2012	November 25, 2030	December 5, 2048
48	49	50
December 17, 2066	December 27, 2084	January 8, 2103

References

1. "1922 Solar Eclipse in Australia Testing Einstein's Theory". Retrieved 4 June 2011.
2. http://eclipse.gsfc.nasa.gov/SEsaros/SEsaros133.html

External links

• Fotos of Solar Corona September 21, 1922

• Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
  • Google interactive map
  • Besselian elements
• 1922 Solar Eclipse in Australia
• Wallal: The 1922 Eclipse Expedition
• Photographs from the Wallal Australia expedition from the Lick Observatory Records Digital Archive, UC Santa Cruz Library's Digital Collections