The 310 - 680 metre wide asteroid (345646) 2006 TN will make a close pass (52.4 LD, 0.1347 AU) travelling at 12.24 km/second, to the Earth-Moon system on the 9th April 2015 @ 17:21 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).