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2004 FH
2004 FH is a near-Earth asteroid that was discovered on March 15, 2004, by the NASA-funded LINEAR asteroid survey. The object is roughly 30 metres in diameter and passed just above the Earth's surface on March 18, 2004, at 22:08 UTC; making it the 11th closest approach to Earth recorded (see the diagram below). For comparison, geostationary satellites orbit Earth at 35,790 km. 2004 FH is an Aten family asteroid. Despite its relatively small size (about 30 metres), it is still the fourth largest asteroid detected coming closer to the Earth than the Moon. Had this object hit Earth, it would probably have detonated high in the atmosphere. It might have produced a blast measured in hundreds of kilotons of TNT, but may not have produced any effect on the ground. It could also have been an Earth-grazing fireball if it had been much closer but not close enough to impact. On March 17, 2044 the asteroid will pass no closer than from the Earth.〔 2004 FH also has the distinction of having the lowest inclination of any known near-Earth asteroids. Two weeks later another asteroid approached even closer, , which was smaller, and a few years later , which was closer in size passed by at similar distance. == See also ==
* Near-Earth object * List of notable asteroids
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「2004 FH」の詳細全文を読む
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