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21st-century partial solar eclipse From Wikipedia, the free encyclopedia
A partial solar eclipse occurred at the Moon’s ascending node of orbit on Friday, November 25, 2011,[1][2][3] with a magnitude of 0.9047. A solar eclipse occurs when the Moon passes between Earth and the Sun, 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.
This was the last of four partial solar eclipses in 2011, with the others occurring on January 4, June 1, and July 1.
This eclipse was visible across Antarctica in its summer 24-hour day sunlight, and New Zealand at sunset with less than 20% of the Sun obscured. Parts of the western Antarctic Peninsula experienced nearly 90% obscuration of the Sun, while South Africa and Tasmania experienced a very small partial eclipse.
Animated path
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.[4]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 2011 November 25 at 04:24:22.8 UTC |
| Ecliptic Conjunction | 2011 November 25 at 06:10:47.5 UTC |
| Greatest Eclipse | 2011 November 25 at 06:21:24.5 UTC |
| Equatorial Conjunction | 2011 November 25 at 06:32:28.3 UTC |
| Last Penumbral External Contact | 2011 November 25 at 08:18:24.1 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.90468 |
| Eclipse Obscuration | 0.88451 |
| Gamma | −1.05359 |
| Sun Right Ascension | 16h02m13.7s |
| Sun Declination | -20°40'56.2" |
| Sun Semi-Diameter | 16'12.1" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 16h01m46.2s |
| Moon Declination | -21°44'25.4" |
| Moon Semi-Diameter | 16'32.6" |
| Moon Equatorial Horizontal Parallax | 1°00'42.7" |
| ΔT | 66.5 s |
This eclipse is part of an eclipse 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 a fortnight.
| November 25 Ascending node (new moon) | December 10 Descending node (full moon) |
|---|---|
 |  |
| Partial solar eclipse Solar Saros 123 | Total lunar eclipse Lunar Saros 135 |
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.[5]
The partial solar eclipses on January 4, 2011 and July 1, 2011 occur in the previous lunar year eclipse set.
| Solar eclipse series sets from 2011 to 2014 | ||||||
|---|---|---|---|---|---|---|
| Descending node | Ascending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
118.jpg) Partial in Tromsø, Norway |
June 1, 2011 Partial |
1.21300 | 123 Hinode XRT footage |
November 25, 2011 Partial |
−1.05359 | |
128 Annularity in Red Bluff, CA, USA |
May 20, 2012 Annular |
0.48279 | 133 Totality in Mount Carbine, Queensland, Australia |
November 13, 2012 Total |
−0.37189 | |
138 Annularity in Churchills Head, Australia |
May 10, 2013 Annular |
−0.26937 | 143 Partial in Libreville, Gabon |
November 3, 2013 Hybrid |
0.32715 | |
148.jpg) Partial in Adelaide, Australia |
April 29, 2014 Annular (non-central) |
−0.99996 | 153 Partial in Minneapolis, MN, USA |
October 23, 2014 Partial |
1.09078 | |
This eclipse is a part of Saros series 123, repeating every 18 years, 11 days, and containing 70 events. The series started with a partial solar eclipse on April 29, 1074. It contains annular eclipses from July 2, 1182 through April 19, 1651; hybrid eclipses from April 30, 1669 through May 22, 1705; and total eclipses from June 3, 1723 through October 23, 1957. The series ends at member 70 as a partial eclipse on May 31, 2318. 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 annularity was produced by member 19 at 8 minutes, 7 seconds on November 9, 1398, and the longest duration of totality was produced by member 42 at 3 minutes, 27 seconds on July 27, 1813. All eclipses in this series occur at the Moon’s ascending node of orbit.[6]
| Series members 42–63 occur between 1801 and 2200: | ||
|---|---|---|
| 42 | 43 | 44 |
 July 27, 1813 |
 August 7, 1831 |
 August 18, 1849 |
| 45 | 46 | 47 |
 August 29, 1867 |
 September 8, 1885 |
 September 21, 1903 |
| 48 | 49 | 50 |
 October 1, 1921 |
 October 12, 1939 |
 October 23, 1957 |
| 51 | 52 | 53 |
 November 3, 1975 |
 November 13, 1993 |
November 25, 2011 |
| 54 | 55 | 56 |
 December 5, 2029 |
 December 16, 2047 |
 December 27, 2065 |
| 57 | 58 | 59 |
 January 7, 2084 |
 January 19, 2102 |
 January 30, 2120 |
| 60 | 61 | 62 |
 February 9, 2138 |
 February 21, 2156 |
 March 3, 2174 |
| 63 | ||
 March 13, 2192 | ||
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 1, 2000 and July 1, 2076 | ||||
|---|---|---|---|---|
| July 1–2 | April 19–20 | February 5–7 | November 24–25 | September 12–13 |
| 117 | 119 | 121 | 123 | 125 |
 July 1, 2000 |
 April 19, 2004 |
 February 7, 2008 |
November 25, 2011 |
 September 13, 2015 |
| 127 | 129 | 131 | 133 | 135 |
 July 2, 2019 |
 April 20, 2023 |
 February 6, 2027 |
 November 25, 2030 |
 September 12, 2034 |
| 137 | 139 | 141 | 143 | 145 |
 July 2, 2038 |
 April 20, 2042 |
 February 5, 2046 |
 November 25, 2049 |
 September 12, 2053 |
| 147 | 149 | 151 | 153 | 155 |
 July 1, 2057 |
 April 20, 2061 |
 February 5, 2065 |
 November 24, 2068 |
 September 12, 2072 |
| 157 | ||||
 July 1, 2076 | ||||
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 1837 and 2200 | ||||
|---|---|---|---|---|
 April 5, 1837 (Saros 107) |
 March 5, 1848 (Saros 108) |
 February 3, 1859 (Saros 109) |
 December 2, 1880 (Saros 111) | |
 August 31, 1913 (Saros 114) |
 July 31, 1924 (Saros 115) |
 June 30, 1935 (Saros 116) | ||
 May 30, 1946 (Saros 117) |
 April 30, 1957 (Saros 118) |
 March 28, 1968 (Saros 119) |
 February 26, 1979 (Saros 120) |
 January 26, 1990 (Saros 121) |
 December 25, 2000 (Saros 122) |
November 25, 2011 (Saros 123) |
 October 25, 2022 (Saros 124) |
 September 23, 2033 (Saros 125) |
 August 23, 2044 (Saros 126) |
 July 24, 2055 (Saros 127) |
 June 22, 2066 (Saros 128) |
 May 22, 2077 (Saros 129) |
 April 21, 2088 (Saros 130) |
 March 21, 2099 (Saros 131) |
 February 18, 2110 (Saros 132) |
 January 19, 2121 (Saros 133) |
 December 19, 2131 (Saros 134) |
 November 17, 2142 (Saros 135) |
 October 17, 2153 (Saros 136) |
 September 16, 2164 (Saros 137) |
 August 16, 2175 (Saros 138) |
 July 16, 2186 (Saros 139) |
 June 15, 2197 (Saros 140) | |
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 | ||
|---|---|---|
 April 14, 1809 (Saros 116) |
 March 25, 1838 (Saros 117) |
 March 6, 1867 (Saros 118) |
 February 13, 1896 (Saros 119) |
 January 24, 1925 (Saros 120) |
 January 5, 1954 (Saros 121) |
 December 15, 1982 (Saros 122) |
November 25, 2011 (Saros 123) |
 November 4, 2040 (Saros 124) |
 October 15, 2069 (Saros 125) |
 September 25, 2098 (Saros 126) |
 September 6, 2127 (Saros 127) |
 August 16, 2156 (Saros 128) |
 July 26, 2185 (Saros 129) |
|
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