* Astronomy

The 13 - 29 metre wide asteroid 2010 XF64 will make a close pass (6.0 lunar distances, 0.0155 AU), travelling at 4.55 km/second, to the Earth-Moon system on the 18th December, 2010 @ 09:28 UT ±05:48.

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