The 56 - 120 metre wide asteroid 2015 AC246 will make a close pass (75.6 LD, 0.1943 AU) travelling at 4.93 km/second, to the Earth-Moon system on the 20th February 2015 @ 03:05 UT ±00:04.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).