By David Dickinson

The orbit of asteroid 2010 WC9. Credit: NASA/JPL

Incoming: The Earth-Moon system has company tonight.

The Asteroid: Near Earth Asteroid 2010 WC9 is back. Discovered by the Catalina Sky Survey outside Tucson, Arizona on November 30th, 2010, this asteroid was lost after a brief 10 day observation window and was not …read more

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