* Astronomy

The 28 - 63 metre wide asteroid 2010 XN25 will make a close pass (25.5 lunar distances, 04:33AU), travelling at 4.62 km/second, to the Earth-Moon system on the 11th December, 2010 @ 12:44 UT ±21:48.

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