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The solar eclipse that will take place on Wednesday, July 22, 2009 will be a total eclipse of the Sun. It will be the longest total solar eclipse of the 21st century, lasting at greatest eclipse 6 minutes, 58 seconds, it has sparked tourist interest in eastern China and India.

The eclipse is part of series 136 in the Saros cycle, like the record setting Solar eclipse of July 11, 1991. The exceptional duration is a result of the moon being near perigee, with the diameter of the moon 8% larger than the sun (magnitude 1.080). This is second in the series of three eclipses in a month. There was a lunar eclipse on July 7 and now a solar eclipse on July 22 and then a lunar eclipse on August 6.

Visibility

It will be visible from a narrow corridor through nothern Maldives, northern India, eastern Nepal, northern Bangladesh, Bhutan, the northern tip of Myanmar, central China and the Pacific Ocean, including the Ryukyu Islands, Marshall Islands and Kiribati.

Totality will be visible in many large cities, including Surat, Vadodara, Bhopal, Varanasi, Patna, Dinajpur, Guwahati, Chengdu, Nanchong, Chongqing, Yichang, Jingzhou, Wuhan, Huanggang, Hefei, Hangzhou, Wuxi, Huzhou, Suzhou, Jiaxing, Ningbo and Shanghai, as well as over the Three Gorges Dam. According to some experts, Taregana in Bihar is the “best” place to view the event.

A partial eclipse will be seen from the much broader path of the Moon’s penumbra, including most of Southeast Asia (all of India and China) and north-eastern Oceania.

Duration

This solar eclipse is the longest total solar eclipse that will occur in the twenty-first century, and will not be surpassed in duration until June 13, 2132. Totality will last 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 is the landmass with totality time closest to maximum, while the closest inhabited point is Akusekijima, where the eclipse will last 6 minutes and 25 seconds.

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