The 5 - 11 metre wide asteroid 2014 EX24 made a close pass (0.7 lunar distances, 0.0018 AU), travelling at 16.20 km/second, to the Earth-Moon system on the 9th March, 2014 @ 14:35 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).