The 230 - 520 metre wide asteroid 1997 WQ23 will make a close pass (30.6 lunar distances, 0.0787 AU), travelling at 13.55 km/second, to the Earth-Moon system on the 11th November, 2013 @ 21:59 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).
