The 310 - 690 metre wide asteroid 1998 QC1 will make a close pass (63.9 lunar distances, 0.1642 AU), travelling at 17.11 km/second, to the Earth-Moon system on the 14th September, 2012 @ 17:51 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
