308635 (2005 YU₅₅)
Author(s): Art Blos
308635 (2005 YU₅₅) is a potentially dangerous near-Earth asteroid measuring 360-400 meters in diameter. It was discovered on December 28, 2005 by Robert S. McMillan. On November 8, 2011 the asteroid passed at just 0.85 lunar distances from Earth (324,900 km). The possibility of asteroids like 2005 YU₅₅ colliding with Earth is 1% in the next thousand years.
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