The 29 - 65 metre wide asteroid 2016 TB18 will make a close pass (38.7 LD, 0.0995 AU), travelling at 4.33 km/second, to the Earth-Moon system on the 28th March 2017 @ 14:26 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).