The 24 - 54 metre wide asteroid 2015 SA made a close pass (2.9 LD, 0.0075 AU) travelling at 8.51 km/second, to the Earth-Moon system on the 15th September 2015 @ 00:51 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).
