Wikipedia

Solar eclipse of January 4, 2011

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.

Solar eclipse of January 4, 2011
Partial from Poland
Map
Type of eclipse
NaturePartial
Gamma1.0627
Magnitude0.8576
Maximum eclipse
Coordinates64°42′N 20°48′E / 64.7°N 20.8°E / 64.7; 20.8
Times (UTC)
(P1) Partial begin6:40:11
Greatest eclipse8:51:42
(P4) Partial end11:00:52
References
Saros151 (14 of 72)
Catalog # (SE5000)9531

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.

Visibility

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Animated path

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Eclipse details

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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]

January 4, 2011 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 2011 January 04 at 06:41:18.7 UTC
Greatest Eclipse 2011 January 04 at 08:51:42.4 UTC
Ecliptic Conjunction 2011 January 04 at 09:03:43.1 UTC
Equatorial Conjunction 2011 January 04 at 09:16:20.6 UTC
Last Penumbral External Contact 2011 January 04 at 11:02:01.4 UTC
January 4, 2011 Solar Eclipse Parameters
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

Eclipse season

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See also: Eclipse cycle

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.

Eclipse season of December 2010–January 2011
December 21
Descending node (full moon)
 January 4
Ascending node (new moon)
   
Total lunar eclipse
Lunar Saros 125		 Partial solar eclipse
Solar Saros 151
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Eclipses in 2011

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Metonic

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Tzolkinex

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Half-Saros

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Tritos

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Solar Saros 151

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Inex

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Triad

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Solar eclipses of 2008–2011

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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

Saros 151

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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

Metonic series

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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

Tritos series

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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)

Inex series

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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)

Notes

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  1. ^ "January 4, 2011 Partial Solar Eclipse". timeanddate. Retrieved 11 August 2024.
  2. ^ "Mideast, Europe catch partial eclipse". Sentinel Tribune. 2011-01-04. p. 3. Retrieved 2023-10-25 – via Newspapers.com.
  3. ^ "Years's 1st partial eclipse is today". The Daily Oklahoman. 2011-01-04. p. 7. Retrieved 2023-10-25 – via Newspapers.com.
  4. ^ Eclipses during 2011 NASA
  5. ^ "Partial Solar Eclipse of 2011 Jan 04". EclipseWise.com. Retrieved 11 August 2024.
  6. ^ van Gent, R.H. "Solar- and Lunar-Eclipse Predictions from Antiquity to the Present". A Catalogue of Eclipse Cycles. Utrecht University. Retrieved 6 October 2018.
  7. ^ "NASA - Catalog of Solar Eclipses of Saros 151". eclipse.gsfc.nasa.gov.

References

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