* Astronomy

The 630 - 1400 metre wide asteroid 2003 YS117 will make a close pass (73.9 lunar distances, 0.1900 AU), travelling at 17.75 km/second, to the Earth-Moon system on the 14th July, 2011 @ 19:38 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).