The 130 - 280 metre wide asteroid 2015 CX13 will make a close pass (62.8 LD, 0.1613 AU) travelling at 22.65 km/second, to the Earth-Moon system on the 23rd February 2015 @ 20:48 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).