Solar eclipse of October 4, 2051

• A partial solar eclipse on April 11.
• A total lunar eclipse on April 26.
• A partial solar eclipse on October 4.
• A total lunar eclipse on October 19.

• Preceded by: Solar eclipse of December 16, 2047
• Followed by: Solar eclipse of July 24, 2055

• Preceded by: Solar eclipse of August 23, 2044
• Followed by: Solar eclipse of November 16, 2058

• Preceded by: Lunar eclipse of September 29, 2042
• Followed by: Lunar eclipse of October 9, 2060

• Preceded by: Solar eclipse of November 4, 2040
• Followed by: Solar eclipse of September 3, 2062

• Preceded by: Solar eclipse of September 23, 2033
• Followed by: Solar eclipse of October 15, 2069

• Preceded by: Solar eclipse of October 25, 2022
• Followed by: Solar eclipse of September 13, 2080

• Preceded by: Solar eclipse of December 4, 1964
• Followed by: Solar eclipse of August 5, 2138

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.^[3]

The partial solar eclipse on August 3, 2054 occurs in the next lunar year eclipse set.

Solar eclipse series sets from 2051 to 2054
Descending node				Ascending node
Saros	Map	Gamma		Saros	Map	Gamma
120	April 11, 2051 Partial	1.0169		125	October 4, 2051 Partial	−1.2094
130	March 30, 2052 Total	0.3238		135	September 22, 2052 Annular	−0.448
140	March 20, 2053 Annular	−0.4089		145	September 12, 2053 Total	0.314
150	March 9, 2054 Partial	−1.1711		155	September 2, 2054 Partial	1.0215

This eclipse is a part of Saros series 125, repeating every 18 years, 11 days, and containing 73 events. The series started with a partial solar eclipse on February 4, 1060. It contains total eclipses from June 13, 1276 through July 16, 1330; hybrid eclipses on July 26, 1348 and August 7, 1366; and annular eclipses from August 17, 1384 through August 22, 1979. The series ends at member 73 as a partial eclipse on April 9, 2358. Its eclipses are tabulated in three columns; every third eclipse in the same column is one exeligmos apart, so they all cast shadows over approximately the same parts of the Earth.

The longest duration of totality was produced by member 14 at 1 minutes, 11 seconds on June 25, 1294, and the longest duration of annularity was produced by member 48 at 7 minutes, 23 seconds on July 10, 1907. All eclipses in this series occur at the Moon’s ascending node of orbit.^[4]

Series members 43–64 occur between 1801 and 2200:
43	44	45
May 16, 1817	May 27, 1835	June 6, 1853
46	47	48
June 18, 1871	June 28, 1889	July 10, 1907
49	50	51
July 20, 1925	August 1, 1943	August 11, 1961
52	53	54
August 22, 1979	September 2, 1997	September 13, 2015
55	56	57
September 23, 2033	October 4, 2051	October 15, 2069
58	59	60
October 26, 2087	November 6, 2105	November 18, 2123
61	62	63
November 28, 2141	December 9, 2159	December 20, 2177
64
December 31, 2195

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 ascending node.

21 eclipse events between July 23, 2036 and July 23, 2112
July 23–24	May 11	February 27–28	December 16–17	October 4–5
117	119	121	123	125
July 23, 2036	May 11, 2040	February 28, 2044	December 16, 2047	October 4, 2051
127	129	131	133	135
July 24, 2055	May 11, 2059	February 28, 2063	December 17, 2066	October 4, 2070
137	139	141	143	145
July 24, 2074	May 11, 2078	February 27, 2082	December 16, 2085	October 4, 2089
147	149	151	153	155
July 23, 2093	May 11, 2097	February 28, 2101	December 17, 2104	October 5, 2108
157
July 23, 2112

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 1866 and 2200
March 16, 1866 (Saros 108)			December 13, 1898 (Saros 111)
	September 12, 1931 (Saros 114)	August 12, 1942 (Saros 115)	July 11, 1953 (Saros 116)	June 10, 1964 (Saros 117)
May 11, 1975 (Saros 118)	April 9, 1986 (Saros 119)	March 9, 1997 (Saros 120)	February 7, 2008 (Saros 121)	January 6, 2019 (Saros 122)
December 5, 2029 (Saros 123)	November 4, 2040 (Saros 124)	October 4, 2051 (Saros 125)	September 3, 2062 (Saros 126)	August 3, 2073 (Saros 127)
July 3, 2084 (Saros 128)	June 2, 2095 (Saros 129)	May 3, 2106 (Saros 130)	April 2, 2117 (Saros 131)	March 1, 2128 (Saros 132)
January 30, 2139 (Saros 133)	December 30, 2149 (Saros 134)	November 27, 2160 (Saros 135)	October 29, 2171 (Saros 136)	September 27, 2182 (Saros 137)
August 26, 2193 (Saros 138)

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.

Series members between 1801 and 2200
March 14, 1820 (Saros 117)	February 23, 1849 (Saros 118)	February 2, 1878 (Saros 119)
January 14, 1907 (Saros 120)	December 25, 1935 (Saros 121)	December 4, 1964 (Saros 122)
November 13, 1993 (Saros 123)	October 25, 2022 (Saros 124)	October 4, 2051 (Saros 125)
September 13, 2080 (Saros 126)	August 26, 2109 (Saros 127)	August 5, 2138 (Saros 128)
July 16, 2167 (Saros 129)	June 26, 2196 (Saros 130)

• http://eclipse.gsfc.nasa.gov/SEplot/SEplot2051/SE2051Oct04P.GIF