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| Partial eclipse | |
 Partial from Poland | |
 Map | |
| Gamma | 1.0627 |
|---|---|
| Magnitude | 0.8576 |
| Maximum eclipse | |
| Coordinates | 64°42′N 20°48′E / 64.7°N 20.8°E |
| Times (UTC) | |
| (P1) Partial begin | 6:40:11 |
| Greatest eclipse | 8:51:42 |
| (P4) Partial end | 11:00:52 |
| References | |
| Saros | 151 (14 of 72) |
| Catalog # (SE5000) | 9531 |
A partial solar eclipse occurred at the Moon’s ascending node of orbit on Tuesday, January 4, 2011,[1][2][3] with a magnitude of 0.8576. 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 first of four partial solar eclipses in 2011, with the others occurring on June 1, July 1, and November 25.
The greatest eclipse occurred at 08:51 UTC in northern Sweden. At that time, the axis of the Moon's shadow passed a mere 510 km above Earth's surface.[4]
The eclipse was visible near sunrise over most of Europe before moving over central Asia. It ended at sunset over east Asia. It was visible as a minor partial eclipse over north Africa and the Middle East.
Animated path
| Country or territory | City or place | Start of partial eclipse | Maximum eclipse | End of partial eclipse | Duration of eclipse (hr:min) | Maximum coverage | |||
|---|---|---|---|---|---|---|---|---|---|
 France |
Paris | 08:43:47 (sunrise) | 09:09:35 | 10:30:29 | 1:47 | 64.97% | |||
 Italy |
Rome | 07:51:58 | 09:10:25 | 10:38:26 | 2:46 | 60.71% | |||
 United Kingdom |
London | 08:05:42 (sunrise) | 08:11:48 | 09:31:02 | 1:25 | 66.78% | |||
 Switzerland |
Zurich | 08:12:58 (sunrise) | 09:13:33 | 10:38:27 | 2:25 | 66.52% | |||
 Luxembourg |
Luxembourg | 08:31:56 (sunrise) | 09:14:25 | 10:37:31 | 2:06 | 68.06% | |||
 Belgium |
Brussels | 08:44:38 (sunrise) | 09:14:38 | 10:36:30 | 1:52 | 68.56% | |||
 Netherlands |
Amsterdam | 08:49:56 (sunrise) | 09:17:37 | 10:39:26 | 1:50 | 70.49% | |||
 Croatia |
Zagreb | 07:59:41 | 09:20:50 | 10:50:16 | 2:51 | 67.68% | |||
 Greece |
Athens | 08:57:34 | 10:23:37 | 11:58:20 | 3:01 | 58.24% | |||
 Austria |
Vienna | 08:03:30 | 09:24:44 | 10:53:28 | 2:50 | 70.63% | |||
 Czech Republic |
Prague | 08:04:51 | 09:24:45 | 10:51:53 | 2:51 | 72.04% | |||
 Slovakia |
Bratislava | 08:04:03 | 09:25:42 | 10:54:45 | 2:51 | 70.76% | |||
 Serbia |
Belgrade | 08:02:21 | 09:26:21 | 10:58:06 | 2:56 | 67.57% | |||
 Germany |
Berlin | 08:16:44 (sunrise) | 09:26:57 | 10:52:35 | 2:36 | 74.00% | |||
 Hungary |
Budapest | 08:04:48 | 09:27:39 | 10:57:46 | 2:53 | 70.48% | |||
 Bulgaria |
Sofia | 09:02:38 | 10:28:34 | 12:02:05 | 2:59 | 65.20% | |||
 Denmark |
Copenhagen | 08:37:56 (sunrise) | 09:30:37 | 10:54:24 | 2:16 | 76.17% | |||
 Norway |
Oslo | 09:16:55 (sunrise) | 09:34:57 | 10:55:56 | 1:39 | 77.93% | |||
 Romania |
Bucharest | 09:08:14 | 10:35:33 | 12:09:04 | 3:01 | 67.52% | |||
 Poland |
Warsaw | 08:13:51 | 09:36:32 | 11:04:43 | 2:51 | 75.23% | |||
 Sweden |
Stockholm | 08:42:33 (sunrise) | 09:41:37 | 11:04:40 | 2:22 | 78.95% | |||
 Moldova |
Chișinău | 09:15:16 | 10:43:11 | 12:15:40 | 3:00 | 70.20% | |||
 Turkey |
Ankara | 09:12:44 | 10:44:05 | 12:19:38 | 3:07 | 60.27% | |||
 Lithuania |
Vilnius | 09:21:55 | 10:45:19 | 12:12:38 | 2:51 | 76.94% | |||
 Latvia |
Riga | 09:24:10 | 10:46:05 | 12:11:42 | 2:48 | 78.19% | |||
 Belarus |
Minsk | 09:23:15 | 10:47:47 | 12:15:49 | 2:53 | 76.24% | |||
 Ukraine |
Kyiv | 09:22:05 | 10:49:15 | 12:19:41 | 2:58 | 73.13% | |||
 Estonia |
Tallinn | 09:28:33 | 10:49:25 | 12:13:18 | 2:45 | 79.10% | |||
 Finland |
Helsinki | 09:29:50 | 10:50:21 | 12:13:43 | 2:44 | 79.28% | |||
 Russia |
Moscow | 10:38:12 | 12:03:52 | 13:29:58 | 2:52 | 74.58% | |||
| References: [1] | |||||||||
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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.[5]
| Event | Time (UTC) |
|---|---|
| First Penumbral External Contact | 2011 January 4 at 06:41:18.7 UTC |
| Greatest Eclipse | 2011 January 4 at 08:51:42.4 UTC |
| Ecliptic Conjunction | 2011 January 4 at 09:03:43.1 UTC |
| Equatorial Conjunction | 2011 January 4 at 09:16:20.6 UTC |
| Last Penumbral External Contact | 2011 January 4 at 11:02:01.4 UTC |
| Parameter | Value |
|---|---|
| Eclipse Magnitude | 0.85759 |
| Eclipse Obscuration | 0.79839 |
| Gamma | 1.06265 |
| Sun Right Ascension | 18h59m14.9s |
| Sun Declination | -22°44'21.1" |
| Sun Semi-Diameter | 16'15.9" |
| Sun Equatorial Horizontal Parallax | 08.9" |
| Moon Right Ascension | 18h58m23.8s |
| Moon Declination | -21°46'01.2" |
| Moon Semi-Diameter | 15'18.1" |
| Moon Equatorial Horizontal Parallax | 0°56'09.6" |
| ΔT | 66.3 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.
| December 21 Descending node (full moon) |
January 4 Ascending node (new moon) |
|---|---|
 |
|
| Total lunar eclipse Lunar Saros 125 |
Partial solar eclipse Solar Saros 151 |
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.[6]
The partial solar eclipses on June 1, 2011 and November 25, 2011 occur in the next lunar year eclipse set.
| Solar eclipse series sets from 2008 to 2011 | ||||||
|---|---|---|---|---|---|---|
| Ascending node | Descending node | |||||
| Saros | Map | Gamma | Saros | Map | Gamma | |
121 Partial in Christchurch, New Zealand |
February 7, 2008 Annular |
−0.95701 | 126 Totality in Kumul, Xinjiang, China |
August 1, 2008 Total |
0.83070 | |
131 Annularity in Palangka Raya, Indonesia |
January 26, 2009 Annular |
−0.28197 | 136 Totality in Kurigram District, Bangladesh |
July 22, 2009 Total |
0.06977 | |
141 Annularity in Jinan, Shandong, China |
January 15, 2010 Annular |
0.40016 | 146 Totality in Hao, French Polynesia |
July 11, 2010 Total |
−0.67877 | |
| 151 Partial in Poland |
January 4, 2011 Partial |
1.06265 | 156 | July 1, 2011 Partial |
−1.49171 | |
This eclipse is a part of Saros series 151, repeating every 18 years, 11 days, and containing 72 events. The series started with a partial solar eclipse on August 14, 1776. It contains annular eclipses from February 28, 2101 through April 23, 2191; a hybrid eclipse on May 5, 2209; and total eclipses from May 16, 2227 through July 6, 2912. The series ends at member 72 as a partial eclipse on October 1, 3056. 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 will be produced by member 19 at 2 minutes, 44 seconds on February 28, 2101, and the longest duration of totality will be produced by member 60 at 5 minutes, 41 seconds on May 22, 2840. All eclipses in this series occur at the Moon’s ascending node of orbit.[7]
| Series members 3–24 occur between 1801 and 2200: | ||
|---|---|---|
| 3 | 4 | 5 |
 September 5, 1812 |
 September 17, 1830 |
 September 27, 1848 |
| 6 | 7 | 8 |
 October 8, 1866 |
 October 19, 1884 |
 October 31, 1902 |
| 9 | 10 | 11 |
 November 10, 1920 |
 November 21, 1938 |
 December 2, 1956 |
| 12 | 13 | 14 |
 December 13, 1974 |
 December 24, 1992 |
January 4, 2011 |
| 15 | 16 | 17 |
 January 14, 2029 |
 January 26, 2047 |
 February 5, 2065 |
| 18 | 19 | 20 |
 February 16, 2083 |
 February 28, 2101 |
 March 11, 2119 |
| 21 | 22 | 23 |
 March 21, 2137 |
 April 2, 2155 |
 April 12, 2173 |
| 24 | ||
 April 23, 2191 | ||
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.
| 22 eclipse events between January 5, 1935 and August 11, 2018 | ||||
|---|---|---|---|---|
| January 4–5 | October 23–24 | August 10–12 | May 30–31 | March 18–19 |
| 111 | 113 | 115 | 117 | 119 |
 January 5, 1935 |
 August 12, 1942 |
 May 30, 1946 |
 March 18, 1950 | |
| 121 | 123 | 125 | 127 | 129 |
 January 5, 1954 |
 October 23, 1957 |
 August 11, 1961 |
 May 30, 1965 |
 March 18, 1969 |
| 131 | 133 | 135 | 137 | 139 |
 January 4, 1973 |
 October 23, 1976 |
 August 10, 1980 |
 May 30, 1984 |
 March 18, 1988 |
| 141 | 143 | 145 | 147 | 149 |
 January 4, 1992 |
 October 24, 1995 |
 August 11, 1999 |
 May 31, 2003 |
 March 19, 2007 |
| 151 | 153 | 155 | ||
January 4, 2011 |
 October 23, 2014 |
 August 11, 2018 | ||
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 2087 | ||||
|---|---|---|---|---|
 August 17, 1803 (Saros 132) |
 July 17, 1814 (Saros 133) |
 June 16, 1825 (Saros 134) |
 May 15, 1836 (Saros 135) |
 April 15, 1847 (Saros 136) |
 March 15, 1858 (Saros 137) |
 February 11, 1869 (Saros 138) |
 January 11, 1880 (Saros 139) |
 December 12, 1890 (Saros 140) |
 November 11, 1901 (Saros 141) |
 October 10, 1912 (Saros 142) |
 September 10, 1923 (Saros 143) |
 August 10, 1934 (Saros 144) |
 July 9, 1945 (Saros 145) |
 June 8, 1956 (Saros 146) |
 May 9, 1967 (Saros 147) |
 April 7, 1978 (Saros 148) |
 March 7, 1989 (Saros 149) |
 February 5, 2000 (Saros 150) |
January 4, 2011 (Saros 151) |
 December 4, 2021 (Saros 152) |
 November 3, 2032 (Saros 153) |
 October 3, 2043 (Saros 154) |
 September 2, 2054 (Saros 155) |
 August 2, 2065 (Saros 156) |
 July 1, 2076 (Saros 157) |
 June 1, 2087 (Saros 158) | |||
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 | ||
|---|---|---|
 May 25, 1808 (Saros 144) |
 May 4, 1837 (Saros 145) |
 April 15, 1866 (Saros 146) |
 March 26, 1895 (Saros 147) |
 March 5, 1924 (Saros 148) |
 February 14, 1953 (Saros 149) |
 January 24, 1982 (Saros 150) |
January 4, 2011 (Saros 151) |
 December 15, 2039 (Saros 152) |
 November 24, 2068 (Saros 153) |
 November 4, 2097 (Saros 154) |
 October 16, 2126 (Saros 155) |
 September 26, 2155 (Saros 156) |
 September 4, 2184 (Saros 157) |
|
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