The 25 - 55 metre wide asteroid 2015 FP will make a close pass (9.6 LD, 0.0248 AU) travelling at 7.49 km/second, to the Earth-Moon system on the 28th March 2015 @ 04:23 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).