|
(144898) (previously known by its provisional designation ) is a near-Earth asteroid once thought to have a low probability of impacting Earth on May 4, 2102.〔 From February to May 2006 it was listed with a Torino Scale impact risk value of 2, only the second asteroid in risk-monitoring history to be rated above value 1.〔 The Torino rating was lowered to 1 after additional observations on May 20, 2006, and finally dropped to 0 on October 17, 2006. It was removed from the Sentry Risk Table on 14 February 2008.〔 As of January 4, 2008, the Sentry Risk Table assigned a Torino value of 0 and an impact probability of 1 in 58.8 million for May 4, 2102.〔 This value was far below the background impact rate of objects this size. was discovered on November 7, 2004, by the NASA-funded LINEAR asteroid survey. The object is estimated by NASA's Near Earth Object Program Office to be 580 meters in diameter with an approximate mass of 2.6×1011 kg.〔 It will pass from the Earth on May 1, 2032, allowing a refinement to the orbit.〔 Being ~580 meters in diameter, if were to impact land, it would produce a crater about 10 kilometres wide and an earthquake of magnitude 7.4.〔 ==See also== * 3103 Eger * 99942 Apophis * Aubrite * E-type asteroid * Hungaria family * List of notable asteroids * Asteroid deflection strategies 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「(144898) 2004 VD17」の詳細全文を読む スポンサード リンク
|