* Astronomy

The 41 - 91 metre wide asteroid 1998 SD9 will make a close pass (28.2 lunar distances, 0.0725 AU), travelling at 12.62 km/second, to the Earth-Moon system on the 9th October, 2011 @ 17:57 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).