* Astronomy

The 36 - 82 metre wide asteroid 2010 XB25 will make a close pass (19.3 lunar distances, 0.0495 AU), travelling at 12.18 km/second, to the Earth-Moon system on the 18th December, 2010 @ 10:43 UT ±1 minute.

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