The 37 - 84 metre wide asteroid 2015 EF7 will make a close pass (15.6 LD, 0.0402 AU) travelling at 5.19 km/second, to the Earth-Moon system on the 23rd March 2015 @ 20:10 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).
