The 37 - 84 metre wide asteroid 2010 UB will make a close pass (15.3 lunar distances, 0.0393 AU), travelling at 8.29 km/second, to the Earth-Moon system on the 21st October, 2010 @ 23:59 UT. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Orbital elements: 2010 UB Earth MOID = 0.0100 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 322.65083 (2000.0) P Q n 0.33420031 Peri. 200.03890 +0.57329706 -0.81862725 a 2.0565131 Node 215.00530 +0.75966257 +0.54677585 e 0.5191833 Incl. 3.43287 +0.30699064 +0.17574298 P 2.95 H 24.3 G 0.15 U 8