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Solar eclipse of July 22, 2009

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A total solar eclipse occurred at the Moon's descending node of orbit on Wednesday, July 22, 2009,[1][2][3][4] with a magnitude of 1.07991. 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 total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 5.5 hours after perigee (on July 21, 2009, at 21:10 UTC), the Moon's apparent diameter was larger.[5]

Solar eclipse of July 22, 2009
Totality from Kurigram District, Bangladesh
Map
Type of eclipse
NatureTotal
Gamma0.0698
Magnitude1.0799
Maximum eclipse
Duration399 s (6 min 39 s)
Coordinates24°12′N 144°06′E / 24.2°N 144.1°E / 24.2; 144.1
Max. width of band258 km (160 mi)
Times (UTC)
(P1) Partial begin23:58:18
(U1) Total begin0:51:16
Greatest eclipse2:36:25
(U4) Total end4:19:26
(P4) Partial end5:12:25
References
Saros136 (37 of 71)
Catalog # (SE5000)9528

This was the longest total solar eclipse during the 21st century, with totality lasting a maximum of 6 minutes and 38.86 seconds off the coast of Southeast Asia,[6] causing tourist interest in eastern China, Pakistan, Japan, India, Nepal and Bangladesh.

Visibility

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View from a boat in Ganges

The total eclipse was visible from a narrow corridor through northern India, eastern Nepal, northern Bangladesh, Bhutan, the northern tip of Myanmar, central China and the Pacific Ocean, including the northern part of the Ryukyu Islands, the whole Volcano Islands except South Iwo Jima, Marshall Islands, and Kiribati.

Totality was visible in many large cities, including Dhaka and Dinajpur, and Chapai Nawabganj district in Bangladesh; Surat, Vadodara, Bhopal, Varanasi, Patna, Gaya, Siliguri, Tawang and Guwahati in India; and Chengdu, Nanchong, Chongqing, Yichang, Jingzhou, Wuhan, Huanggang, Hefei, Hangzhou, Wuxi, Huzhou, Suzhou, Jiaxing, Ningbo, Shanghai as well as over the Three Gorges Dam in China. However, in Shanghai, the largest city in the eclipse's path, the view was obscured by heavy clouds.[7][8] According to NASA, the Japanese island Kitaio Jima was predicted to have the best viewing conditions[9][10] featuring both longer viewing time (being the closest point of land to the point of greatest eclipse) and lower cloud cover statistics than all of continental Asia.

A partial eclipse was seen within the broad path of the Moon's penumbra, including most of Southeast Asia (all of Pakistan, India and China), East Asia, northern Oceania, and Hawaii.

The eclipse, and the reaction of thousands of observers at Varanasi was captured by the Science Channel Wonders of the Universe series hosted by Brian Cox.[11]

This eclipse may be the most-viewed total solar eclipse in history, with 30 million people in Shanghai and Hangzhou alone.[12]

Observations

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Crowds gather on the ghats of Ganges for the eclipse in Varanasi, India.

Thousands of pilgrims gathered on the banks of the Ganges River in Varanasi, India to experience the eclipse as a religious or spiritual event. Some people expected that there would be a relationship, either positive or negative, between their health and the occurrence of the eclipse.[13]

Indian scientists observed the solar eclipse from an Indian Air Force plane.[14]

The Chinese government used the opportunity to provide scientific education and to dispel any superstition. A flight by China Eastern Airlines from Wuhan to Shanghai took a slight detour and followed the course of the eclipse to allow longer observation time for the scientists on board.

Observers in Japan were excited by the prospect of experiencing the first eclipse in 46 years, but found the experience dampened by cloudy skies obscuring the view.

In Bangladesh, where the eclipse lasted approximately 3 minutes and 44 seconds, thousands of people were able to witness the eclipse despite rain and overcast skies.

Duration

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These identically scaled photos compare the apparent diameter of the full moon (near apogee) to the nearly new moon (visible by earthshine) on the day before the solar eclipse near lunar perigee.

This solar eclipse was the longest total solar eclipse to occur in the 21st century, and will not be surpassed in duration until 13 June 2132 (Saros 139, ascending node) which will last for 6 minutes and 55 seconds. Totality lasted for up to 6 minutes and 38.86 seconds (0.14 seconds shorter than 6 minutes and 39 seconds), with the maximum eclipse occurring in the ocean at 02:35:21 UTC about 100 km south of the Bonin Islands, southeast of Japan. The uninhabited North Iwo Jima island was the landmass with totality time closest to maximum, while the closest inhabited point was Akusekijima, where the eclipse lasted 6 minutes and 26 seconds.[15]

The cruise ship Costa Classica was chartered specifically to view this eclipse and by viewing the eclipse at the point of maximum duration and cruising along the centerline during the event, duration was extended to 6 minutes, 42 seconds.

The eclipse was part of Saros series 136, descending node, as was the solar eclipse of July 11, 1991, which was slightly longer, lasting up to 6 minutes 53.08 seconds (previous eclipses of the same saros series on June 30, 1973, and June 20, 1955, were longer, lasting 7 min 03.55 and 7 min 07.74, respectively). The next event from this series will be on August 2, 2027 (6 minutes and 22.64 seconds).[16] The exceptional duration was a result of the Moon being near perigee, with the apparent diameter of the Moon 7.991% larger than the Sun (magnitude 1.07991) and the Earth being near aphelion[17] where the Sun appeared slightly smaller.

In contrast the annular solar eclipse of January 26, 2009 (Saros 131, ascending node) occurred 3.3 days after lunar apogee and 7.175% smaller apparent diameter to the sun. And the next solar eclipse of January 15, 2010 (Saros 141, ascending node) was also annular, 1.8 days before lunar apogee, with the Moon 8.097% smaller than the Sun.

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Totality

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Partial

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View from space

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Animation of eclipse path

The Terrain Mapping Camera in the Chandrayaan-1 lunar mission was used to image the earth during the eclipse.[18]

It was also observed by the Japanese geostationary satellite MTSAT:[19]


12:30 UT (pre-eclipse)
1:30 UT 		 
Close up at 1:30 UT

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.[20]

July 22, 2009 Solar Eclipse Times
Event Time (UTC)
First Penumbral External Contact 2009 July 21 at 23:59:22.1 UTC
First Umbral External Contact 2009 July 22 at 00:52:20.3 UTC
First Central Line 2009 July 22 at 00:53:57.4 UTC
First Umbral Internal Contact 2009 July 22 at 00:55:34.5 UTC
First Penumbral Internal Contact 2009 July 22 at 01:48:45.6 UTC
Greatest Duration 2009 July 22 at 02:30:22.6 UTC
Equatorial Conjunction 2009 July 22 at 02:34:07.5 UTC
Ecliptic Conjunction 2009 July 22 at 02:35:42.1 UTC
Greatest Eclipse 2009 July 22 at 02:36:24.6 UTC
Last Penumbral Internal Contact 2009 July 22 at 03:24:06.5 UTC
Last Umbral Internal Contact 2009 July 22 at 04:17:16.6 UTC
Last Central Line 2009 July 22 at 04:18:53.3 UTC
Last Umbral External Contact 2009 July 22 at 04:20:30.0 UTC
Last Penumbral External Contact 2009 July 22 at 05:13:28.7 UTC
July 22, 2009 Solar Eclipse Parameters
Parameter Value
Eclipse Magnitude 1.07991
Eclipse Obscuration 1.16620
Gamma 0.06977
Sun Right Ascension 08h06m24.1s
Sun Declination +20°16'03.0"
Sun Semi-Diameter 15'44.5"
Sun Equatorial Horizontal Parallax 08.7"
Moon Right Ascension 08h06m29.6s
Moon Declination +20°20'07.0"
Moon Semi-Diameter 16'42.7"
Moon Equatorial Horizontal Parallax 1°01'19.8"
ΔT 65.9 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. The first and last eclipse in this sequence is separated by one synodic month.[6][21][22]

Eclipse season of July–August 2009
July 7
Ascending node (full moon)
 July 22
Descending node (new moon)
 August 6
Ascending node (full moon)
     
Penumbral lunar eclipse
Lunar Saros 110		 Total solar eclipse
Solar Saros 136		 Penumbral lunar eclipse
Lunar Saros 148
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Eclipses in 2009

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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 136

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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.[23]

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 136

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This eclipse is a part of Saros series 136, repeating every 18 years, 11 days, and containing 71 events. The series started with a partial solar eclipse on June 14, 1360. It contains annular eclipses from September 8, 1504 through November 12, 1594; hybrid eclipses from November 22, 1612 through January 17, 1703; and total eclipses from January 27, 1721 through May 13, 2496. The series ends at member 71 as a partial eclipse on July 30, 2622. 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 9 at 32 seconds on September 8, 1504, and the longest duration of totality was produced by member 34 at 7 minutes, 7.74 seconds on June 20, 1955. All eclipses in this series occur at the Moon’s descending node of orbit.[24]

Series members 26–47 occur between 1801 and 2200:
26 27 28
 
March 24, 1811 		 
April 3, 1829 		 
April 15, 1847
29 30 31
 
April 25, 1865 		 
May 6, 1883 		 
May 18, 1901
32 33 34
 
May 29, 1919 		 
June 8, 1937 		 
June 20, 1955
35 36 37
 
June 30, 1973 		 
July 11, 1991 		 
July 22, 2009
38 39 40
 
August 2, 2027 		 
August 12, 2045 		 
August 24, 2063
41 42 43
 
September 3, 2081 		 
September 14, 2099 		 
September 26, 2117
44 45 46
 
October 7, 2135 		 
October 17, 2153 		 
October 29, 2171
47
 
November 8, 2189

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 descending node.

21 eclipse events between July 22, 1971 and July 22, 2047
July 22 May 9–11 February 26–27 December 14–15 October 2–3
116 118 120 122 124
 
July 22, 1971 		 
May 11, 1975 		 
February 26, 1979 		 
December 15, 1982 		 
October 3, 1986
126 128 130 132 134
 
July 22, 1990 		 
May 10, 1994 		 
February 26, 1998 		 
December 14, 2001 		 
October 3, 2005
136 138 140 142 144
 
July 22, 2009 		 
May 10, 2013 		 
February 26, 2017 		 
December 14, 2020 		 
October 2, 2024
146 148 150 152 154
 
July 22, 2028 		 
May 9, 2032 		 
February 27, 2036 		 
December 15, 2039 		 
October 3, 2043
156
 
July 22, 2047

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 2200
 
March 4, 1802
(Saros 117) 		 
February 1, 1813
(Saros 118) 		 
January 1, 1824
(Saros 119) 		 
November 30, 1834
(Saros 120) 		 
October 30, 1845
(Saros 121)
 
September 29, 1856
(Saros 122) 		 
August 29, 1867
(Saros 123) 		 
July 29, 1878
(Saros 124) 		 
June 28, 1889
(Saros 125) 		 
May 28, 1900
(Saros 126)
 
April 28, 1911
(Saros 127) 		 
March 28, 1922
(Saros 128) 		 
February 24, 1933
(Saros 129) 		 
January 25, 1944
(Saros 130) 		 
December 25, 1954
(Saros 131)
 
November 23, 1965
(Saros 132) 		 
October 23, 1976
(Saros 133) 		 
September 23, 1987
(Saros 134) 		 
August 22, 1998
(Saros 135) 		 
July 22, 2009
(Saros 136)
 
June 21, 2020
(Saros 137) 		 
May 21, 2031
(Saros 138) 		 
April 20, 2042
(Saros 139) 		 
March 20, 2053
(Saros 140) 		 
February 17, 2064
(Saros 141)
 
January 16, 2075
(Saros 142) 		 
December 16, 2085
(Saros 143) 		 
November 15, 2096
(Saros 144) 		 
October 16, 2107
(Saros 145) 		 
September 15, 2118
(Saros 146)
 
August 15, 2129
(Saros 147) 		 
July 14, 2140
(Saros 148) 		 
June 14, 2151
(Saros 149) 		 
May 14, 2162
(Saros 150) 		 
April 12, 2173
(Saros 151)
 
March 12, 2184
(Saros 152) 		 
February 10, 2195
(Saros 153)

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
 
December 10, 1806
(Saros 129) 		 
November 20, 1835
(Saros 130) 		 
October 30, 1864
(Saros 131)
 
October 9, 1893
(Saros 132) 		 
September 21, 1922
(Saros 133) 		 
September 1, 1951
(Saros 134)
 
August 10, 1980
(Saros 135) 		 
July 22, 2009
(Saros 136) 		 
July 2, 2038
(Saros 137)
 
June 11, 2067
(Saros 138) 		 
May 22, 2096
(Saros 139) 		 
May 3, 2125
(Saros 140)
 
April 12, 2154
(Saros 141) 		 
March 23, 2183
(Saros 142)

Notes

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  1. ^ "July 22, 2009 Total Solar Eclipse". timeanddate. Retrieved 11 August 2024.
  2. ^ "Full solar eclipse turns the day to night in Asia". The Bismarck Tribune. 2009-07-23. p. 7. Retrieved 2023-10-25 – via Newspapers.com.
  3. ^ "Celestial awe, fear". Leader-Telegram. 2009-07-23. p. C10. Retrieved 2023-10-25 – via Newspapers.com.
  4. ^ "Asia shrouded in daytime darkness in longest eclipse until 2132". The Star-Democrat. 2009-07-23. p. 4. Retrieved 2023-10-25 – via Newspapers.com.
  5. ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 11 August 2024.
  6. ^ a b (AFP) – 6 days ago. "AFP: Solar eclipse sparks tourism fever in China". Archived from the original on July 27, 2009. Retrieved 2009-07-22.{{cite web}}: CS1 maint: numeric names: authors list (link)
  7. ^ 99.56% totality was observed in Kamat Maath, Binodpur, Chapai Nawabgan, the western part of Bangladesh.
    In Sichuan province, China, 150 km southwest of Chengdu many people ascended Mount Emei to view the eclipse. While viewing conditions were not ideal due to thick cloud cover, typical of this region and altitude, the effects were reported as impressive. The summit of Mt. Emei contains numerous Buddhist temples and statues, as well as a large candle and incense lighting ceremony/area. During the eclipse day turned to night, leaving only the candles to cast a unique lighting on the adjacent Buddhist statues and buildings.
    "NASA – Total Solar Eclipse of 2009 July 22". NASA.gov. Retrieved 2009-07-22.
  8. ^ Weather conditions for cities in China during the July 22 eclipse (in Chinese)
  9. ^ "NASA Map" (PDF).
  10. ^ Espenak, Fred. "Total Solar Eclipse of July 2009" (PDF).
  11. ^ "The Solar Eclipse In Varanasi - Wonders of the Solar System - Series 1 Episode 1 Preview - BBC Two". YouTube. Archived from the original on 2021-12-13.
  12. ^ "Solar Eclipse on July 22 May Be Most Viewed Ever". nationalgeographic.com. Archived from the original on July 23, 2009.
  13. ^ "Indians enthralled by solar eclipse". Chinadaily.com.cn. 2009-07-22. Retrieved 2009-07-22.
  14. ^ "Khabrein.info". Khabrein.info. Archived from the original on July 28, 2009. Retrieved 2009-07-22.{{cite web}}: CS1 maint: unfit URL (link)
  15. ^ "Island « Total Eclipse.Jp". Totaleclipse.jp. Archived from the original on 2009-04-18. Retrieved 2009-07-22.
  16. ^ "August 2, 2027 Total Solar Eclipse". Tierrayestrellas.com. Archived from the original on July 25, 2009. Retrieved 2009-07-22.
  17. ^ Nemiroff, R.; Bonnell, J., eds. (3 July 2009). "Perihelion and Aphelion". Astronomy Picture of the Day. NASA. Retrieved 2009-07-22.
  18. ^ "Chandrayaan-1". ISRO. Archived from the original on February 17, 2009. Retrieved 2009-07-22.
  19. ^ "Eclipse Shadows Southeastern China : Image of the Day". nasa.gov. 23 July 2009.
  20. ^ "Total Solar Eclipse of 2009 Jul 22". EclipseWise.com. Retrieved 11 August 2024.
  21. ^ Wang, Hongjiang (2009-07-22). "Scientists: China the best place to observe longest solar eclipse in 2,000 years_English_Xinhua". News.xinhuanet.com. Archived from the original on 2009-05-21. Retrieved 2009-07-22.
  22. ^ "Indian students on solar eclipse 'odyssey' to China – Yahoo! India News". In.news.yahoo.com. Archived from the original on 2009-07-29. Retrieved 2009-07-22.
  23. ^ 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.
  24. ^ "NASA - Catalog of Solar Eclipses of Saros 136". eclipse.gsfc.nasa.gov.

References

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Pre-eclipse news:

Photos:

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Wikimedia Commons has media related to Solar eclipse of 2009 July 22.
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