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2007 VE191
(also written 2007 VE191) is a near-Earth asteroid that was listed on the Sentry Risk Table.〔 It was estimated to be roughly 63 meters in diameter and to have a 1 in 63,000 chance of impacting Earth on 27 November 2015.〔 However, the nominal best-fit orbit shows that will be roughly from Earth on 27 November 2015 with an apparent magnitude of roughly +25 in the constellation of Virgo about 50 degrees from the Sun,〔 and the same nominal orbit gives a distance of closest approach to Earth of a little under 0.4 AU a few weeks earlier. It was removed from the Sentry Risk Table on 17 September 2015,〔 but is still listed at NEODyS with odds of 1 in 3 million for 27 November 2015.〔
was discovered on 15 November 2007 by the Mount Lemmon Survey at an apparent magnitude of 20 using a reflecting telescope.〔 On 28 November 2007, it passed from Earth.〔 has an observation arc of 13 days with an uncertainty parameter of 7, which means its orbit is poorly constrained.〔 was last observed on 28 November 2007.〔 By 1 December 2007, the asteroid had faded to below magnitude 25.〔
With an absolute magnitude of 23.6,〔 is about 50–110 meters in diameter.〔
==References==
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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