The 8 - 18 metre wide asteroid 2008 CT1 will make a close pass (26.2 lunar distances, 0.0674 au), travelling at 15.82 km/second, to the Earth-Moon system on the 22nd October, 2012 @ 20:31 UT ±15:38.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).