* Astronomy

The 260 - 580 metre wide asteroid 2008 ER7 will make a close pass (44.8 Lunar Distances, 0.1151 AU), travelling at 22.47 km/s, to the Earth-Moon system on the 21st July, 2009.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).