Earth Crossing Asteroid Has A Moon | Video

Radar imagery of space rock 1998 QE2 – 1.7 miles in diameter – shows it has a ~2000 foot wide satellite. The 'binary asteroid' will makes its closest approach to Earth on May 31st, 2013 at a range of 3.6 million miles.
credit : NASA/JPL-Caltech/GSSR
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