09/03/18 05:38:58.90 KxtU4C8K● BE:699546637-PLT(12022) ポイント特典
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Space Weather News for March 17, 2009
URLﾘﾝｸ(spaceweather.com)
ASTEROID BUZZES EARTH: Newly-discovered asteroid 2009 FH is flying past Earth
tonight only 85,000 km (0.00057 AU) away. That's a little more than twice the height
of a geosynchronous communications satellite.
This is the second time in March that an asteroid has flown so close to Earth. On
March 2nd, 2009 DD45 passed by only 72,000 km away. Measuring some tens of
meters in diameter, 2009 DD45 and 2009 FH are approximately Tunguska-class objects,
meaning they pose no global threat but could cause local damage if they actually hit
Earth. In years past, asteroids of this size often passed unnoticed, but recent
improvements in asteroid surveys have resulted in growing numbers of space rocks
caught in the act of near-Earth flybys.