The 42 - 93 metre wide asteroid 2015 CO13 will make a close pass (13.4 LD, 0.0344 AU) travelling at 19.10 km/second, to the Earth-Moon system on the 24th February 2015 @ 19:30 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).