The 13 - 29 metre wide asteroid 2017 BJ30 will make a close pass (1.0 LD, 0.0026 AU) travelling at 5.89 km/second, to the Earth-Moon system on the 31st January 2017 @ 02:36 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).