* Astronomy

The 330 - 730 metre wide asteroid 2011 HO will make a close pass (70.5 lunar distances, 0.1812 AU), travelling at 9.38 km/second, to the Earth-Moon system on the 21st June, 2011 @ 15:18 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).