The near-Earth asteroid 2012 XE54, which was discovered Sunday (Dec. 9), came within 140,000 miles of our planet at about 5 a.m. EST Tuesday (Dec. 11), researchers said. For comparison, the moon orbits Earth at an average distance of 240,000 miles or so
Asteroid passes inside moon's orbit, buzzes Earth - CBS News
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Seeded on Wed Dec 12, 2012 7:41 AM
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