* Astronomy

The 620 - 1400  metre wide asteroid 1999 XP35 will make a close pass (77.5 lunar distances, 0.1991 AU), travelling at 11.15 km/second, to the Earth-Moon system on the 20th December, 2011 @ 03:25 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).