Asteroid 2013 XY8 is at magnitude 14,4 in the constellation Orion at 21:00 UT, 10th December 2013
The 31 - 68 metre wide asteroid 2013 XY8 will make a close pass (2.0 lunar distances, 0.0051 AU), travelling at 9.06 km/second, to the Earth-Moon system on the 11th December, 2013 @ 11:16 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).