* Astronomy

The 170 - 390 metre wide asteroid 2010 RG137 will make a close pass (47.8 lunar distances, 0.1228 AU), travelling at 7.82 km/second, to the Earth-Moon system on the 23rd October, 2010 @ 21:42 UT.

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