| Partial eclipse | |
 Map | |
| Gamma | −1.2882 |
|---|---|
| Magnitude | 0.4696 |
| Maximum eclipse | |
| Coordinates | 71°00′S130°30′W / 71°S 130.5°W /-71; -130.5 |
| Times (UTC) | |
| Greatest eclipse | 11:46:57 |
| References | |
| Saros | 125 (58 of 73) |
| Catalog # (SE5000) | 9705 |
A partialsolar eclipse will occur at the Moon'sascending node of orbit on Sunday, October 26, 2087,[1] with amagnitude of 0.4696. 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 southernSouth America 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 | 2087 October 26 at 10:00:50.1 UTC |
| Ecliptic Conjunction | 2087 October 26 at 11:31:59.1 UTC |
| Greatest Eclipse | 2087 October 26 at 11:46:56.7 UTC |
| Equatorial Conjunction | 2087 October 26 at 12:25:49.5 UTC |
| Last Penumbral External Contact | 2087 October 26 at 13:32:48.0 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.46962 |
| Eclipse Obscuration | 0.34848 |
| Gamma | −1.28822 |
| Sun Right Ascension | 14h04m17.3s |
| Sun Declination | -12°36'18.7" |
| Sun Semi-Diameter | 16'05.1" |
| Sun Equatorial Horizontal Parallax | 08.8" |
| Moon Right Ascension | 14h03m06.4s |
| Moon Declination | -13°43'47.4" |
| Moon Semi-Diameter | 14'46.3" |
| Moon Equatorial Horizontal Parallax | 0°54'12.8" |
| ΔT | 112.1 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 26 Ascending node (new moon) | November 10 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 onJune 1, 2087 occurs in the previous lunar year eclipse set.
| Solar eclipse series sets from 2087 to 2090 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
| 120 | May 2, 2087 Partial | 1.1139 | 125 | October 26, 2087 Partial | −1.2882 | |
| 130 | April 21, 2088 Total | 0.4135 | 135 | October 14, 2088 Annular | −0.5349 | |
| 140 | April 10, 2089 Annular | −0.3319 | 145 | October 4, 2089 Total | 0.2167 | |
| 150 | March 31, 2090 Partial | −1.1028 | 155 | September 23, 2090 Total | 0.9157 | |
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.
| 22 eclipse events between June 1, 2076 and October 27, 2163 | ||||
|---|---|---|---|---|
| June 1–3 | March 21–22 | January 7–8 | October 26–27 | August 14–15 |
| 119 | 121 | 123 | 125 | 127 |
 June 1, 2076 |  March 21, 2080 |  January 7, 2084 | October 26, 2087 |  August 15, 2091 |
| 129 | 131 | 133 | 135 | 137 |
 June 2, 2095 |  March 21, 2099 |  January 8, 2103 |  October 26, 2106 |  August 15, 2110 |
| 139 | 141 | 143 | 145 | 147 |
 June 3, 2114 |  March 22, 2118 |  January 8, 2122 |  October 26, 2125 |  August 15, 2129 |
| 149 | 151 | 153 | 155 | 157 |
 June 3, 2133 |  March 21, 2137 |  January 8, 2141 |  October 26, 2144 |  August 14, 2148 |
| 159 | 161 | 163 | 165 | |
 June 3, 2152 |  October 27, 2163 | |||
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.
The partial solar eclipses onApril 8, 1902 (part of Saros 108) andJanuary 5, 1935 (part of Saros 111) are also a part of this series but are not included in the table below.
| Series members between 2000 and 2200 | ||||
|---|---|---|---|---|
 July 1, 2000 (Saros 117) |  June 1, 2011 (Saros 118) |  April 30, 2022 (Saros 119) |  March 30, 2033 (Saros 120) |  February 28, 2044 (Saros 121) |
 January 27, 2055 (Saros 122) |  December 27, 2065 (Saros 123) |  November 26, 2076 (Saros 124) | October 26, 2087 (Saros 125) |  September 25, 2098 (Saros 126) |
 August 26, 2109 (Saros 127) |  July 25, 2120 (Saros 128) |  June 25, 2131 (Saros 129) |  May 25, 2142 (Saros 130) |  April 23, 2153 (Saros 131) |
 March 23, 2164 (Saros 132) |  February 21, 2175 (Saros 133) |  January 20, 2186 (Saros 134) |  December 19, 2196 (Saros 135) | |
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 | ||
|---|---|---|
 April 26, 1827 (Saros 116) |  April 5, 1856 (Saros 117) |  March 16, 1885 (Saros 118) |
 February 25, 1914 (Saros 119) |  February 4, 1943 (Saros 120) |  January 16, 1972 (Saros 121) |
 December 25, 2000 (Saros 122) |  December 5, 2029 (Saros 123) |  November 16, 2058 (Saros 124) |
October 26, 2087 (Saros 125) |  October 6, 2116 (Saros 126) |  September 16, 2145 (Saros 127) |
 August 27, 2174 (Saros 128) | ||
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