Solar eclipse of July 11, 1991
View from Guanacaste, Costa Rica
Solar eclipse of July 11, 1991
Type of eclipse
Nature	Total
Gamma	-0.0043
Magnitude	1.0800
Maximum eclipse
Duration	413.1 s (6 min 53.1 s)
Location	Pacific Ocean
Coordinates	24°12′36″N 144°06′24″E / 24.21000°N 144.10667°E / 24.21000; 144.10667
Max. width of band	258.4 km
Times (UTC)
(P1) Partial begin	16:28:46
(U1) Total begin	17:21:41
(U2) Central begin	17:24:55
Greatest eclipse	19:06:05
(U3) Central end	20:47:15
(U4) Total end	20:50:28
(P4) Partial end	21:43:24
References
Saros	136 (36 of 71)

A total solar eclipse took place on July 11, 1991, totality beginning over the Pacific Ocean and Hawaii moving across Mexico, down through Central America and across South America ending over Brazil. It lasted for 6 minutes and 53 seconds at the point of maximum eclipse.

Observations

View near the end of totality, Playas del Coco, Guanacaste, Costa Rica.
Partial phase before totality as seen through the cloud cover, Guanacaste, Costa Rica.
Animation of eclipse path

Related eclipses

Solar eclipses 1990-1992

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] This semester series contains only 7 eclipses.

Solar eclipse series sets from 1990 to 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

Saros 136

Solar Saros 136, repeating every 18 years, 11 days, contains 71 events. The series started with partial solar eclipse on June 14, 1360, and reached a first annular eclipse on September 8, 1504. It was a hybrid event from November 22, 1612, through January 17, 1703, and total eclipses from January 27, 1721, through May 13, 2496. The series ends at member 71 as a partial eclipse on July 30, 2622, with the entire series lasting 1262 years. The longest eclipse occurred on June 20, 1955, with a maximum duration of totality at 7 minutes, 7.74 seconds. All eclipses in this series occurs at the Moon's descending node.^[2]

Series members 29–43 occur between 1865 and 2117
29	30	31
Apr 25, 1865	May 6, 1883	May 18, 1901
32	33	34
May 29, 1919	Jun 8, 1937	Jun 20, 1955
35	36	37
Jun 30, 1973	Jul 11, 1991	Jul 22, 2009
38	39	40
Aug 2, 2027	Aug 12, 2045	Aug 24, 2063
41	42	43
Sep 3, 2081	Sep 14, 2099	Sep 26, 2117

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. In the 18th century:

Solar Saros 127: Total Solar Eclipse of 1731 Jan 08
Solar Saros 128: Annular Solar Eclipse of 1759 Dec 19
Solar Saros 129: Annular Solar Eclipse of 1788 Nov 27

Inex series members between 1801 and 2200:
Near lunar perigee	After lunar apogee Before lunar perigee	Before lunar apogee After lunar perigee
November 9, 1817 (Saros 130)	October 20, 1846 (Saros 131)	September 29, 1875 (Saros 132)
September 9, 1904 (Saros 133)	August 21, 1933 (Saros 134)	July 31, 1962 (Saros 135)
July 11, 1991 (Saros 136)	June 21, 2020 (Saros 137)	May 31, 2049 (Saros 138)
May 11, 2078 (Saros 139)	April 23, 2107 (Saros 140)	April 1, 2136 (Saros 141)
March 12, 2165 (Saros 142)	February 21, 2194 (Saros 143)

In the 23rd century:

Solar Saros 144: Annular Solar Eclipse of 2223 Feb 01
Solar Saros 145: Total Solar Eclipse of 2252 Jan 12
Solar Saros 146: Annular Solar Eclipse of 2280 Dec 22

Tritos series

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 1801 and 2100
December 21, 1805 (Saros 119)	November 19, 1816 (Saros 120)	October 20, 1827 (Saros 121)
September 18, 1838 (Saros 122)	August 18, 1849 (Saros 123)	July 18, 1860 (Saros 124)
June 18, 1871 (Saros 125)	May 17, 1882 (Saros 126)	April 16, 1893 (Saros 127)
March 17, 1904 (Saros 128)	February 14, 1915 (Saros 129)	January 14, 1926 (Saros 130)
December 13, 1936 (Saros 131)	November 12, 1947 (Saros 132)	October 12, 1958 (Saros 133)
September 11, 1969 (Saros 134)	August 10, 1980 (Saros 135)	July 11, 1991 (Saros 136)
June 10, 2002 (Saros 137)	May 10, 2013 (Saros 138)	April 8, 2024 (Saros 139)
March 9, 2035 (Saros 140)	February 5, 2046 (Saros 141)	January 5, 2057 (Saros 142)
December 6, 2067 (Saros 143)	November 4, 2078 (Saros 144)	October 4, 2089 (Saros 145)
September 4, 2100 (Saros 146)