The 70 - 160 metre wide asteroid 2015 CA14 made a close pass (55.8 LD, 0.1434 AU) travelling at 17.77 km/second, to the Earth-Moon system on the 16th February 2015 @ 03:34 UT ±00:04.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).