The 360 - 810 metre wide asteroid 2001 SZ269 made a close pass (31.4 lunar distances, 0.0807 AU), travelling at 18.37 km/second, to the Earth-Moon system on the 2nd May, 2012 @ 07:22 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).