The 84 - 190 metre wide asteroid 2007 RY19 will make a close pass (28.2 lunar distances, 0.0725 AU), travelling at 10.67 km/second, to the Earth-Moon system on the 23rd September 2014 @ 13:25 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).