The 10 - 22 metre wide asteroid 2008 OT7 will make a close pass (50.5 lunar distances, 0.1298 AU), travelling at 13.41 km/second, to the Earth-Moon system on the 27th January, 2013 @ 18:29 UT ±07:22.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).