| Partial eclipse | |
 Map | |
| Gamma | −1.2094 |
|---|---|
| Magnitude | 0.6024 |
| Maximum eclipse | |
| Coordinates | 72°00′S117°42′E / 72°S 117.7°E /-72; 117.7 |
| Times (UTC) | |
| Greatest eclipse | 21:02:14 |
| References | |
| Saros | 125 (56 of 73) |
| Catalog # (SE5000) | 9622 |
A partialsolar eclipse will occur at the Moon'sascending node of orbit between Wednesday, October 4 and Thursday, October 5, 2051,[1] with amagnitude of 0.6024. Asolar eclipse occurs when theMoon passes betweenEarth and theSun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth.
The partial solar eclipse will be visible for parts of southeasternAustralia,New Zealand, andAntarctica.
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse.[2]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 2051 October 4 at 19:03:47.6 UTC |
| Ecliptic Conjunction | 2051 October 4 at 20:48:07.0 UTC |
| Greatest Eclipse | 2051 October 4 at 21:02:14.5 UTC |
| Equatorial Conjunction | 2051 October 4 at 21:47:07.0 UTC |
| Last Penumbral External Contact | 2051 October 4 at 23:00:22.7 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.60242 |
| Eclipse Obscuration | 0.49381 |
| Gamma | −1.20938 |
| Sun Right Ascension | 12h42m39.3s |
| Sun Declination | -04°35'05.4" |
| Sun Semi-Diameter | 15'59.2" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 12h41m20.9s |
| Moon Declination | -05°37'21.2" |
| Moon Semi-Diameter | 14'44.4" |
| Moon Equatorial Horizontal Parallax | 0°54'05.8" |
| ΔT | 85.1 s |
This eclipse is part of aneclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by afortnight.
| October 4 Ascending node (new moon) | October 19 Descending node (full moon) |
|---|---|
|  |
| Partial solar eclipse Solar Saros 125 | Total lunar eclipse Lunar Saros 137 |
This eclipse is a member of asemester series. An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternatingnodes of the Moon's orbit.[3]
The partial solar eclipse onAugust 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 ofSaros 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 throughAugust 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 oneexeligmos 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 onJuly 10, 1907. All eclipses in this series occur at the Moon’sascending 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 | ||
Themetonic 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 atritos cycle, repeating at alternating nodes every 135synodic months (≈ 3986.63 days, or 11 years minus 1 month). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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 periodinex cycle, repeating at alternating nodes, every 358synodic months (≈ 10,571.95 days, or 29 years minus 20 days). Their appearance and longitude are irregular due to a lack of synchronization with theanomalistic 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) | |
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