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2009 Jupiter impact event
The 2009 Jupiter impact event, occasionally referred to as the Wesley impact, was a July 2009 impact on Jupiter that caused a black spot in the planet's atmosphere. The impact area covered 190 million square kilometers, similar in area to the planet's Little Red Spot and approximately the size of the Pacific Ocean.〔(Jupiter pummeled, leaving bruise the size of the Pacific Ocean ). University of California, Berkeley press release, July 21, 2009.〕 The impactor is estimated to have been about 200 to 500 meters in diameter.〔
==Discovery==
Amateur astronomer Anthony Wesley discovered the impact at approximately 13:30 UTC on 19 July 2009 (almost exactly 15 years after the Jupiter impact of comet Shoemaker–Levy 9, or SL9). He was at his home observatory just outside Murrumbateman, New South Wales, Australia, using stacked images on a diameter reflecting telescope equipped with a low light machine vision video camera attached to the telescope. Wesley stated that
Wesley sent an e-mail to others including the NASA Jet Propulsion Laboratory in Pasadena, California reporting his observations.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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