The 35 - 79 metre wide asteroid 2015 SD made a close pass (32.2 LD, 0.0828 AU) travelling at 10.73 km/second, to the Earth-Moon system on the 19th September 2015 @ 17:37 UT ±00:06.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
