Solar eclipse of October 21, 1930

A total solar eclipse occurred on October 21, 1930. 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. Totality was visible from Niuafoʻou in Tonga, Chile, and a tiny part of Santa Cruz Province, Argentina.

Solar eclipse of October 21, 1930
Map
Type of eclipse
NatureTotal
Gamma−0.3804
Magnitude1.023
Maximum eclipse
Duration115 sec (1 m 55 s)
Coordinates30.5°S 161.1°W / -30.5; -161.1
Max. width of band84 km (52 mi)
Times (UTC)
Greatest eclipse21:43:53
References
Saros142 (18 of 72)
Catalog # (SE5000)9352

Solar eclipses 1928–1931

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 1928–1931
Ascending node   Descending node
117May 19, 1928

Total (non-central)		 122November 12, 1928

Partial
127May 9, 1929

Total		 132November 1, 1929

Annular
137April 28, 1930

Hybrid		 142October 21, 1930

Total
147April 18, 1931

Partial		 152October 11, 1931

Partial

Saros series 142

It is a part of Saros cycle 142, repeating every 18 years, 11 days, containing 72 events. The series started with partial solar eclipse on April 17, 1624. It contains one hybrid eclipse on July 14, 1768, and total eclipses from July 25, 1786 through October 29, 2543. The series ends at member 72 as a partial eclipse on June 5, 2904. The longest duration of totality will be 6 minutes, 34 seconds on May 28, 2291. All eclipses in this series occurs at the Moon’s descending node.[2]

Series members 17–41 occur between 1901 and 2359
17 18 19

October 10, 1912
October 21, 1930
November 1, 1948
20 21 22

November 12, 1966
November 22, 1984
December 4, 2002
23 24 25

December 14, 2020
December 26, 2038
January 5, 2057
26 27 28

January 16, 2075
January 27, 2093
February 8, 2111
29 30 31

February 18, 2129
March 2, 2147
March 12, 2165
32 33 34

March 23, 2183
April 4, 2201
April 15, 2219
35 36 37

April 25, 2237
May 7, 2255
May 17, 2273
38 39 40

May 28, 2291
June 9, 2309
June 20, 2327
41

June 30, 2345

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.

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. http://eclipse.gsfc.nasa.gov/SEsaros/SEsaros142.html

References
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.