DETAILS:
The solar eclipse of 22 July 2009 was the longest total solar eclipse during the 21st century, not to be surpassed until June 2132. It lasted a maximum of 6 minutes and 39 seconds off the coast of Southeast Asia, causing tourist interest in eastern China, India and Nepal. This was the second in the series of three eclipses in a one-month period, being book-ended by two minor penumbral lunar eclipses, first on July 7 and last on August 6.
Visibility:
A partial eclipse was seen within the broad path of the Moon's penumbra, including most of Southeast Asia (all of India and China) and north-eastern Oceania.
The total eclipse was visible from a narrow corridor through northern Maldives, northern India, eastern Nepal, northern Bangladesh, Bhutan, northern Philippines, the northern tip of Myanmar, central China and the Pacific Ocean, including the Ryukyu Islands, Marshall Islands and Kiribati.
Totality was visible in many large cities, including Surat, Vadodara, Bhopal, Varanasi, Patna, Gaya, Dinajpur, Siliguri, Guwahati, Tawang 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. According to some experts, Taregana in Bihar, India was expected to be the best place to view the event.
Duration:
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. Totality lasted for up to 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.
The eclipse was part of Saros series 136, as was the solar eclipse of July 11, 1991, which was slightly longer, lasting up to 6 minutes 53 seconds (previous eclipses of the same saros series on June 30, 1973 and June 20, 1955, were longer, lasting 7 min 04 and 7 min 08, respectively). The next event from this series will be on August 2, 2027. The exceptional duration was a result of the Moon being near perigee, with the apparent diameter of the Moon 8% larger than the Sun (magnitude 1.080) and the Earth being near aphelion where the Sun appeared slightly smaller.
In contrast the annular solar eclipse of January 26, 2009 occurred near lunar apogee and 7% smaller apparent diameter to the sun. And the next solar eclipse of January 15, 2010 will also be annular, with the moon 9% smaller than the sun.
"Phases of the solar eclipse from Lucknow, India "