The 12 - 28 metre wide asteroid 2015 DU will make a close pass (8.0 LD, 0.0205 AU) travelling at 1.69 km/second, to the Earth-Moon system on the 23rd February 2015 @ 10:20 UT ±00:09.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).