Solar eclipse of July 11, 2010
A total solar eclipse occurred at the Moon's descending node of orbit between Tuesday, July 11 and Wednesday, July 12, 2010,[1][2][3][4] with a magnitude of 1.058. 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 1.6 days before perigee (on July 13, 2010, at 12:20 UTC), the Moon's apparent diameter was larger.[5]
Visibility
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/SE2010Jul11T.gif/220px-SE2010Jul11T.gif)
The eclipse on this day was one of the most remote in recorded history. It was visible over much of the southern Pacific Ocean, touching several atolls in French Polynesia, the Cook Islands, Easter Island, and Argentina's Patagonian plains.[6]
Fred Espenak, a NASA astrophysicist, said:
"One of the most unique things about this particular eclipse is that it crosses a unique and interesting archaeological site: Easter Island. On Easter Island there are these great statues... There's a lot of mystery about these statues, but in any case, this is the first total eclipse to hit the island in about 1,400 years."[7]
In French Polynesia, the eclipse was seen with 98 percent totality. During that time, the diamond ring effect and the Baily's beads occurred.
It ended at sunset over the southern tips of Argentina and Chile in South America, including the town of El Calafate. The Sun's altitude was only 1° during the 2 minute 47 second total phase, but Argentino Lake offered an adequate line-of-sight to the eclipse hanging just above the rugged Andes skyline.[2]
A 58% partiality occurred at sunset in Santiago, Chile, but it was not visible due to adverse weather conditions. In other cities such as Valparaíso and Coquimbo, clearer skies permitted the event to be witnessed in continental Chile.
Observations
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/07/Solar_eclipse_July_11_2010_relative_diameters.png/220px-Solar_eclipse_July_11_2010_relative_diameters.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/77/ECLIPSEparcial_chile.jpg/220px-ECLIPSEparcial_chile.jpg)
Total eclipse began 750 kilometers (470 mi) southeast of Tonga at approximately 18:15 UTC and reached Easter Island by 20:11 UTC.[8] The global sky photography project The World At Night stationed photographers throughout the eclipse's visibility track. Eclipse chasers photographed the event on board a chartered airplane,[9] cruise ships, numerous Pacific islands, and in Argentina's Patagonia region. Totality was observed for four minutes and 41 seconds (4:41) on Easter Island,[6] where it was observed for the first time in 1,400 years.[10] Approximately 4,000 observers visited Easter Island for this eclipse, including tourists, scientists, photographers, filmmakers and journalists,[11] prompting an increase in security at its important moai archeological sites. The eclipse occurred at the same time that the final game of the 2010 FIFA World Cup was being played in South Africa, and many soccer fans in Tahiti watched the match instead of observing the partial eclipse with a high percentage of obscuring the sun by over 98%.[8][12] The path of totality of this eclipse barely missed some significant inhabited islands, including passing just about 20 km north of the northern end of Tahiti.[citation needed]
This eclipse was the first one to happen over French Polynesia in 350 years. An estimated 5,000 tourists visited various islands in the archipelago to observe the event. Nearly 120,000 pairs of special glasses were distributed for observers.[13] Eclipse chasers were also able to observe the eclipse at El Calafate, near the southern tip of Argentina, before the sun set just two minutes later.[6]
Several hours after the eclipse was observed in continental Chile, a magnitude 6.2 earthquake struck in the Antofagasta Region. There were no major injuries or damage in the nearby cities of Calama, Chile and San Pedro de Atacama.[14]
Eclipse details
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.[15]
Event | Time (UTC) |
---|---|
First Penumbral External Contact | 2010 July 11 at 17:10:44.0 UTC |
First Umbral External Contact | 2010 July 11 at 18:16:18.5 UTC |
First Central Line | 2010 July 11 at 18:17:56.9 UTC |
First Umbral Internal Contact | 2010 July 11 at 18:19:36.2 UTC |
Greatest Duration | 2010 July 11 at 19:32:32.2 UTC |
Greatest Eclipse | 2010 July 11 at 19:34:37.9 UTC |
Ecliptic Conjunction | 2010 July 11 at 19:41:33.7 UTC |
Equatorial Conjunction | 2010 July 11 at 19:52:01.5 UTC |
Last Umbral Internal Contact | 2010 July 11 at 20:49:26.0 UTC |
Last Central Line | 2010 July 11 at 20:51:07.2 UTC |
Last Umbral External Contact | 2010 July 11 at 20:52:47.5 UTC |
Last Penumbral External Contact | 2010 July 11 at 21:58:20.8 UTC |
Parameter | Value |
---|---|
Eclipse Magnitude | 1.05805 |
Eclipse Obscuration | 1.11946 |
Gamma | −0.67877 |
Sun Right Ascension | 07h23m57.6s |
Sun Declination | +22°02'11.0" |
Sun Semi-Diameter | 15'43.9" |
Sun Equatorial Horizontal Parallax | 08.7" |
Moon Right Ascension | 07h23m15.8s |
Moon Declination | +21°22'29.3" |
Moon Semi-Diameter | 16'26.6" |
Moon Equatorial Horizontal Parallax | 1°00'20.9" |
ΔT | 66.2 s |
Eclipse season
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.
June 26 Ascending node (full moon) | July 11 Descending node (new moon) |
---|---|
![]() | ![]() |
Partial lunar eclipse Lunar Saros 120 | Total solar eclipse Solar Saros 146 |
Related eclipses
Eclipses in 2010
- An annular solar eclipse on January 15.
- A partial lunar eclipse on June 26.
- A total solar eclipse on July 11.
- A total lunar eclipse on December 21.
Metonic
- Preceded by: Solar eclipse of September 22, 2006
- Followed by: Solar eclipse of April 29, 2014
Tzolkinex
- Preceded by: Solar eclipse of May 31, 2003
- Followed by: Solar eclipse of August 21, 2017
Half-Saros
- Preceded by: Lunar eclipse of July 5, 2001
- Followed by: Lunar eclipse of July 16, 2019
Tritos
- Preceded by: Solar eclipse of August 11, 1999
- Followed by: Solar eclipse of June 10, 2021
Solar Saros 146
- Preceded by: Solar eclipse of June 30, 1992
- Followed by: Solar eclipse of July 22, 2028
Inex
- Preceded by: Solar eclipse of July 31, 1981
- Followed by: Solar eclipse of June 21, 2039
Triad
- Preceded by: Solar eclipse of September 10, 1923
- Followed by: Solar eclipse of May 11, 2097
Solar eclipses of 2008–2011
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.[16]
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, 2001![]() Partial | −1.49171 |
Saros 146
This eclipse is a part of Saros series 146, repeating every 18 years, 11 days, and containing 76 events. The series started with a partial solar eclipse on September 19, 1541. It contains total eclipses from May 29, 1938 through October 7, 2154; hybrid eclipses from October 17, 2172 through November 20, 2226; and annular eclipses from November 30, 2244 through August 10, 2659. The series ends at member 76 as a partial eclipse on December 29, 2893. 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 totality was produced by member 26 at 5 minutes, 21 seconds on June 30, 1992, and the longest duration of annularity will be produced by member 63 at 3 minutes, 30 seconds on August 10, 2659. All eclipses in this series occur at the Moon’s descending node of orbit.[17]
Series members 16–37 occur between 1801 and 2200: | ||
---|---|---|
16 | 17 | 18 |
![]() March 13, 1812 | ![]() March 24, 1830 | ![]() April 3, 1848 |
19 | 20 | 21 |
![]() April 15, 1866 | ![]() April 25, 1884 | ![]() May 7, 1902 |
22 | 23 | 24 |
![]() May 18, 1920 | ![]() May 29, 1938 | ![]() June 8, 1956 |
25 | 26 | 27 |
![]() June 20, 1974 | ![]() June 30, 1992 | ![]() July 11, 2010 |
28 | 29 | 30 |
![]() July 22, 2028 | ![]() August 2, 2046 | ![]() August 12, 2064 |
31 | 32 | 33 |
![]() August 24, 2082 | ![]() September 4, 2100 | ![]() September 15, 2118 |
34 | 35 | 36 |
![]() September 26, 2136 | ![]() October 7, 2154 | ![]() October 17, 2172 |
37 | ||
![]() October 29, 2190 |
Metonic series
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 11, 1953 and July 11, 2029 | ||||
---|---|---|---|---|
July 10–11 | April 29–30 | February 15–16 | December 4 | September 21–23 |
116 | 118 | 120 | 122 | 124 |
![]() July 11, 1953 | ![]() April 30, 1957 | ![]() February 15, 1961 | ![]() December 4, 1964 | ![]() September 22, 1968 |
126 | 128 | 130 | 132 | 134 |
![]() July 10, 1972 | ![]() April 29, 1976 | ![]() February 16, 1980 | ![]() December 4, 1983 | ![]() September 23, 1987 |
136 | 138 | 140 | 142 | 144 |
![]() July 11, 1991 | ![]() April 29, 1995 | ![]() February 16, 1999 | ![]() December 4, 2002 | ![]() September 22, 2006 |
146 | 148 | 150 | 152 | 154 |
![]() July 11, 2010 | ![]() April 29, 2014 | ![]() February 15, 2018 | ![]() December 4, 2021 | ![]() September 21, 2025 |
156 | ||||
![]() July 11, 2029 |
Tritos series
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 | ||||
---|---|---|---|---|
![]() February 21, 1803 (Saros 127) | ![]() January 21, 1814 (Saros 128) | ![]() December 20, 1824 (Saros 129) | ![]() November 20, 1835 (Saros 130) | ![]() October 20, 1846 (Saros 131) |
![]() September 18, 1857 (Saros 132) | ![]() August 18, 1868 (Saros 133) | ![]() July 19, 1879 (Saros 134) | ![]() June 17, 1890 (Saros 135) | ![]() May 18, 1901 (Saros 136) |
![]() April 17, 1912 (Saros 137) | ![]() March 17, 1923 (Saros 138) | ![]() February 14, 1934 (Saros 139) | ![]() January 14, 1945 (Saros 140) | ![]() December 14, 1955 (Saros 141) |
![]() November 12, 1966 (Saros 142) | ![]() October 12, 1977 (Saros 143) | ![]() September 11, 1988 (Saros 144) | ![]() August 11, 1999 (Saros 145) | ![]() July 11, 2010 (Saros 146) |
![]() June 10, 2021 (Saros 147) | ![]() May 9, 2032 (Saros 148) | ![]() April 9, 2043 (Saros 149) | ![]() March 9, 2054 (Saros 150) | ![]() February 5, 2065 (Saros 151) |
![]() January 6, 2076 (Saros 152) | ![]() December 6, 2086 (Saros 153) | ![]() November 4, 2097 (Saros 154) | ![]() October 5, 2108 (Saros 155) | ![]() September 5, 2119 (Saros 156) |
![]() August 4, 2130 (Saros 157) | ![]() July 3, 2141 (Saros 158) | ![]() June 3, 2152 (Saros 159) | ![]() April 1, 2174 (Saros 161) |
Inex series
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 | ||
---|---|---|
![]() November 29, 1807 (Saros 139) | ![]() November 9, 1836 (Saros 140) | ![]() October 19, 1865 (Saros 141) |
![]() September 29, 1894 (Saros 142) | ![]() September 10, 1923 (Saros 143) | ![]() August 20, 1952 (Saros 144) |
![]() July 31, 1981 (Saros 145) | ![]() July 11, 2010 (Saros 146) | ![]() June 21, 2039 (Saros 147) |
![]() May 31, 2068 (Saros 148) | ![]() May 11, 2097 (Saros 149) | ![]() April 22, 2126 (Saros 150) |
![]() April 2, 2155 (Saros 151) | ![]() March 12, 2184 (Saros 152) |
Notes
- ^ "July 11, 2010 Total Solar Eclipse". timeanddate. Retrieved 11 August 2024.
- ^ a b "Total Solar Eclipse of 2010 July 11". NASA. Archived from the original on March 11, 2008. Retrieved July 12, 2010.
- ^ "Chasing a moment in the sun". The Ottawa Citizen. 2010-07-11. p. 12. Retrieved 2023-10-25 – via Newspapers.com.
- ^ "Solar eclipse fans chase moment (out of) sun". The Des Moines Register. 2010-07-11. p. 12. Retrieved 2023-10-25 – via Newspapers.com.
- ^ "Moon Distances for London, United Kingdom, England". timeanddate. Retrieved 11 August 2024.
- ^ a b c Malik, Tariq (July 12, 2010). "Total solar eclipse blots out sun, amazes skywatchers". The Christian Science Monitor. Retrieved July 12, 2010.
- ^ "Solar Eclipse to Darken Easter Island Sunday". National Geographic Society. July 8, 2010. Archived from the original on July 12, 2010. Retrieved July 12, 2010.
- ^ a b "Total solar eclipse crosses South Pacific". BBC News. July 11, 2010. Retrieved July 12, 2010.
- ^ Grossman, Lisa (July 22, 2010). "Longest Eclipse Ever: Airplane Chases the Moon's Shadow". Wired. Retrieved August 21, 2017.
- ^ "Solar Eclipse to Darken Easter Island Sunday". National Geographic. July 8, 2010. Archived from the original on October 31, 2020. Retrieved October 28, 2020.
- ^ Eclipse chasing: four minutes of bliss Archived 2013-06-27 at the Wayback Machine, Australian Geographic, July 16, 2010
- ^ Tee, Gillian (July 10, 2010). "Solar eclipse predicted at same time as World Cup final". CNN. Retrieved July 12, 2010.
- ^ "French Polynesia awaits first solar eclipse in 350 years". Australia Network. July 10, 2010. Archived from the original on July 13, 2010. Retrieved July 12, 2010.
- ^ "6.2 Magnitude Earthquake Strikes Chile Hours After Solar Eclipse". All Headline News. July 12, 2010. Archived from the original on July 14, 2010. Retrieved July 12, 2010.
- ^ "Total Solar Eclipse of 2010 Jul 11". EclipseWise.com. Retrieved 11 August 2024.
- ^ 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.
- ^ "NASA - Catalog of Solar Eclipses of Saros 146". eclipse.gsfc.nasa.gov.
References
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- Earth visibility chart and eclipse statistics Eclipse Predictions by Fred Espenak, NASA/GSFC
- Google interactive map
- Besselian elements
- NASA pdf map
- NASA homepage for July 11 2010 total solar eclipse
- NASA: Eclipses During 2010: Total Solar Eclipse of July 11
- Eclipser: 2010 July 11 Total Solar Eclipse
- Eclipse.org.uk: Total Eclipse of the Sun: 2010 July 11 Archived 2010-03-09 at the Wayback Machine
- www.spaceweather.com
- Easter Island Eclipse, APOD 7/14/2010
- Andes Sunset Eclipse, APOD 7/15/2010, totality from 400 meters above Argentino Lake
- The Crown of the Sun, APOD 7/21/2010, totality from Easter Island
- Diamond Ring and Shadow Bands, APOD 7/24/2010, totality from Hao, French Polynesia
- Eclipse on the Beach, APOD 7/30/2010, totality from Anakena Beach, Easter Island
- Eclipse Shadow Cone Over Patagonia, APOD 8/4/2010, totality from Patagonia, Argentina
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