The 22 - 50 metre wide asteroid 2013 TF135 will make a close pass (21.5 lunar distances, 0.0552 AU), travelling at 9.91 km/second, to the Earth-Moon system on the 15th October, 2013 @ 07:28 UT ±00:03.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).