The 580 - 1300 metre wide asteroid 2002 GT will make a close pass (46.8 lunar distances, 0.1202 AU), travelling at 8.76 km/second, to the Earth-Moon system on the 26th June, 2013 @ 13:06 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).