The 92 - 210 metre wide asteroid 2014 RQ17 will make a close pass (11.9 lunar distances, 0.0305 AU) travelling at 6.40 km/second, to the Earth-Moon system on the 22nd October 2014 @ 06:17 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).