The 13 - 29 metre wide asteroid 2014 HT178 will make a close pass (5.9 lunar distances, 0.0152 AU), travelling at 14.51 km/second, to the Earth-Moon system on the 8th May 2014 @ 11:30 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).