The 300 metre wide asteroid (2340) Hathor will make a close pass (18.8 lunar distances, 0.0482 AU) travelling at 11.91 km/second, to the Earth-Moon system on the 21st October 2014 @ 21:28 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).