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2010 AL30
is a near-Earth asteroid that was discovered on 10 January 2010.〔(【引用サイトリンク】url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010AL30;cad=1 )〕
Italian scientists Ernesto Guido and Giovanni Sostero told RIA Novosti that it had an orbital period of almost exactly one year and might be a spent rocket booster.〔(What was that Mystery object whizzes past Earth ), The Times of India, January 14, 2010〕 However, it was determined that it is a near-Earth asteroid.〔(Small Asteroid 2010 AL30 Will Fly Past The Earth ). NASA/JPL Near-Earth Object Program, January 12, 2010.〕
On January 13, 2010 at 1246 UT it passed Earth at ,〔 about 1/3 of the distance from the Earth to the Moon (or 0.33 LD).
Based an estimated diameter of , if 2010 AL30 had entered the Earth's atmosphere, it would have created an air burst equivalent to between 50 kT and 100 kT (kilotons of TNT). The Nagasaki "Fat Man" atom bomb had a yield between 13–18 kT.〔(Near-Earth Object 2010 AL30 ). NASA Earth Science Picture of the Day March 06, 2010.〕
It has an uncertainty parameter of 2 and has been observed by radar.〔 Radar observations show the asteroid is elongated and is about 30 meters in diameter.〔 It may be a contact binary.
== See also ==
*
* List of asteroid close approaches to Earth
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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