Solar eclipse of April 28, 1930

Solar eclipse of April 28, 1930
Map
Type of eclipse
Nature	Hybrid
Gamma	0.473
Magnitude	1.0003
Maximum eclipse
Duration	1 s (0 min 1 s)
Coordinates	39.4°N 121.2°W / 39.4; -121.2
Max. width of band	1 km (0.62 mi)
Times (UTC)
Greatest eclipse	19:03:34
References
Saros	137 (31 of 70)
Catalog # (SE5000)	9351

A total solar eclipse occurred on April 28, 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. This event is a hybrid, starting and ending as an annular eclipse.

The path of totality crossed the eastern Pacific Ocean, northwestern United States, central and eastern Canada, and northern Labrador of the Dominion of Newfoundland (today's Newfoundland and Labrador in Canada).

Related eclipses

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.

Solar eclipse series sets from 1928 to 1931
Ascending node			Descending node
117	May 19, 1928 Total (non-central)		122	November 12, 1928 Partial
127	May 9, 1929 Total		132	November 1, 1929 Annular
137	April 28, 1930 Hybrid		142	October 21, 1930 Total
147	April 18, 1931 Partial		152	October 11, 1931 Partial

Saros 137

It is a part of Saros cycle 137, repeating every 18 years, 11 days, containing 70 events. The series started with partial solar eclipse on May 25, 1389. It contains total eclipses from August 20, 1533, through December 6, 1695, first set of hybrid eclipses from December 17, 1713, through February 11, 1804, first set of annular eclipses from February 21, 1822, through March 25, 1876, second set of hybrid eclipses from April 6, 1894, through April 28, 1930, and second set of annular eclipses from May 9, 1948, through April 13, 2507. The series ends at member 70 as a partial eclipse on June 28, 2633. The longest duration of totality was 2 minutes, 55 seconds on September 10, 1569. Solar Saros 137 has 55 umbral eclipses from August 20, 1533, through April 13, 2507 (973.62 years).

Series members 30–40 occur between 1901 and 2100:
30	31	32
April 17, 1912	April 28, 1930	May 9, 1948
33	34	35
May 20, 1966	May 30, 1984	June 10, 2002
36	37	38
June 21, 2020	July 2, 2038	July 12, 2056
39	40
July 24, 2074	August 3, 2092

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.

Inex series members between 1901 and 2100:
May 18, 1901 (Saros 136)	April 28, 1930 (Saros 137)	April 8, 1959 (Saros 138)
March 18, 1988 (Saros 139)	February 26, 2017 (Saros 140)	February 5, 2046 (Saros 141)
January 16, 2075 (Saros 142)

References

• Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
  • Google interactive map
  • Besselian elements
• The solar eclipse of April 28, 1930 Popular Astronomy, Vol. 38, p. 537, Makemson, Maud W. [1]
• The Central Solar Eclipse of April 28, 1930 Journal of the Royal Astronomical Society of Canada, Vol. 24, p. 55 [2]