The 29 - 65 metre wide asteroid 2013 RO5 will make a close pass (25.5 LD, 0.0655 AU) travelling at 8.85 km/second, to the Earth-Moon system on the 16th September 2015 @ 15:35 UT ±01:43.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).