* Astronomy

The 130 - 280 metre wide asteroid 2010 XR45 will make a close pass (60.7 lunar distances, 0.1559 AU), travelling at 8.15 km/second, to the Earth-Moon system on the 17th December, 2010 @ 02:16 UT ±03:12.

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