Solar eclipse of July 22, 1990

• An annular solar eclipse on January 26.
• A total lunar eclipse on February 9.
• A total solar eclipse on July 22.
• A partial lunar eclipse on August 6.

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.[2] This semester series contains only 7 eclipses.

Solar eclipse series sets from 1990–1992
Ascending node				Descending node
Saros	Map	Gamma		Saros	Map	Gamma
111	1989 February 6	-1.56550		116	1989 August 1	1.58396
121	1990 January 26 Annular	-0.94571		126	1990 July 22 Total	0.75972
131	1991 January 15 Annular	-0.27275		136 From Playas del Coco	1991 July 11 Total	-0.00412
141	1992 January 4 Annular	0.40908		146	1992 June 30 Total	-0.75120
151	1992 December 24 Partial	1.07106		156	1993 June 20	-1.56439

It is a part of Saros cycle 126, repeating every 18 years, 11 days, containing 72 events. The series started with partial solar eclipse on March 10, 1179. It contains annular eclipses from June 4, 1323 through April 4, 1810, hybrid eclipses from April 14, 1828 through May 6, 1864 and total eclipses from May 17, 1882 through August 23, 2044. The series ends at member 72 as a partial eclipse on May 3, 2459. The longest duration of central eclipse (annular or total) was 6 minutes, 30 seconds of annularity on June 26, 1359. The longest duration of totality was 2 minutes, 36 seconds on July 10, 1972. All eclipses in this series occurs at the Moon’s descending node.

Series members 42–52 occur between 1901 and 2100
42	43	44
June 8, 1918	June 19, 1936	June 30, 1954
45	46	47
July 10, 1972	July 22, 1990	August 1, 2008
48	49	50
August 12, 2026	August 23, 2044	September 3, 2062
51	52
September 13, 2080	September 25, 2098

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.

In the 19th century:

• Solar Saros 120: Total Solar Eclipse of 1816 Nov 19

• Solar Saros 121: Hybrid Solar Eclipse of 1845 Oct 30

• Solar Saros 122: Annular Solar Eclipse of 1874 Oct 10

Inex series members between 1901 and 2100:
September 21, 1903 (Saros 123)	August 31, 1932 (Saros 124)	August 11, 1961 (Saros 125)
July 22, 1990 (Saros 126)	July 2, 2019 (Saros 127)	June 11, 2048 (Saros 128)
May 22, 2077 (Saros 129)

In the 22nd century:

• Solar Saros 130: Total Solar Eclipse of 2106 May 03

• Solar Saros 131: Annular Solar Eclipse of 2135 Apr 13

• Solar Saros 132: Hybrid Solar Eclipse of 2164 Mar 23

• Solar Saros 133: Total Solar Eclipse of 2193 Mar 03

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.

Series members between 1901 and 2100
March 29, 1903 (Saros 118)	February 25, 1914 (Saros 119)	January 24, 1925 (Saros 120)
December 25, 1935 (Saros 121)	November 23, 1946 (Saros 122)	October 23, 1957 (Saros 123)
September 22, 1968 (Saros 124)	August 22, 1979 (Saros 125)	July 22, 1990 (Saros 126)
June 21, 2001 (Saros 127)	May 20, 2012 (Saros 128)	April 20, 2023 (Saros 129)
March 20, 2034 (Saros 130)	February 16, 2045 (Saros 131)	January 16, 2056 (Saros 132)
December 17, 2066 (Saros 133)	November 15, 2077 (Saros 134)	October 14, 2088 (Saros 135)
September 14, 2099 (Saros 136)

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). All eclipses in this table occur at the Moon's descending node.

21 events between July 22, 1971 and July 22, 2047
July 21–22	May 9–11	February 26–27	December 14–15	October 2–3
106	108	110	112	114
July 21, 1952	May 10, 1956	February 26, 1960	December 16, 1963	October 3, 1967
116	118	120	122	124
July 22, 1971	May 11, 1975	February 26, 1979	December 15, 1982	October 3, 1986
126	128	130	132	134
July 22, 1990	May 10, 1994	February 26, 1998	December 14, 2001	October 3, 2005
136	138	140	142	144
July 22, 2009	May 10, 2013	February 26, 2017	December 14, 2020	October 2, 2024
146	148	150	152	154
July 22, 2028	May 9, 2032	February 27, 2036	December 15, 2039	October 3, 2043
156
July 22, 2047