Update: The 890 - 2000 metre wide asteroid 2007 XB10 will make a close pass (27.8 lunar distances, 0.0714 AU), travelling at 25.71 km/second, to the Earth-Moon system on the 13th June, 2010 @ 20:38 UT.
Orbital elements: 2007 XB10 Earth MOID = 0.0543 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 3.47000 (2000.0) P Q n 0.30013605 Peri. 37.23270 +0.32707619 +0.68294528 a 2.2093132 Node 261.21046 -0.94463177 +0.25552455 e 0.5997384 Incl. 41.36955 +0.02630565 +0.68431934 P 3.28 H 17.5 G 0.15 U 4
The 830 - 1900 metre wide asteroid 2007 XB10 will make a close pass (27.6 lunar distances, 0.0708 AU), travelling at 25.71 km/second, to the Earth-Moon system on the 13th June, 2010.