The 13 - 29 metre wide asteroid 2014 SR223 made a close pass (5.3 lunar distances, 0.0137 AU), travelling at 14.33 km/second, to the Earth-Moon system on the 21st September 2014 @ 22:44 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).
