The 540 - 1200 metre wide asteroid 2010 KZ117 will make a close pass (73.1 lunar distances, 0.1877 AU), travelling at 20.15 km/second, to the Earth-Moon system on the 4th August, 2010 @ 10:25 UT.
Orbital elements: 2010 KZ117 Earth MOID = 0.1669 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 5.10651 (2000.0) P Q n 0.28342061 Peri. 321.51999 +0.17133191 +0.90305211 a 2.2953474 Node 314.11011 -0.71214714 -0.16274795 e 0.5176140 Incl. 33.26952 -0.68080234 +0.39750470 P 3.48 H 18.6 G 0.15 U 8