Solar eclipse of May 18, 1920

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 1916–1920
Ascending node			Descending node
111	December 24, 1916 Partial		116	June 19, 1917 Partial
121	December 14, 1917 Annular		126	June 8, 1918 Total
131	December 3, 1918 Annular		136	May 29, 1919 Total
141	November 22, 1919 Annular		146	May 18, 1920 Partial
151	November 10, 1920 Partial

It is a part of Saros cycle 146, repeating every 18 years, 11 days, containing 76 events. The series started with partial solar eclipse on September 19, 1541. It contains total eclipses from May 29, 1938 through October 7, 2154, hybrid eclipses from October 17, 2172 through November 20, 2226, and annular eclipses from December 1, 2244 through August 10, 2659. The series ends at member 76 as a partial eclipse on December 29, 2893. The longest duration of totality was 5 minutes, 21 seconds on June 30, 1992.

Series members 21-37 occur between 1901 and 2200:
21	22	23
May 7, 1902	May 18, 1920	May 29, 1938
24	25	26
June 8, 1956	June 20, 1974	June 30, 1992
27	28	29
July 11, 2010	July 22, 2028	August 2, 2046
30	31	32
August 12, 2064	August 24, 2082	September 4, 2100
33	34	35
September 15, 2118	September 26, 2136	October 7, 2154
36	37
October 17, 2172	October 29, 2190