The 150 - 340 metre wide asteroid 2004 RX10 will make a close pass (31.9 lunar distances, 0.0818 AU), travelling at 11.86 km/second, to the Earth-Moon system on the 15th October, 2012 @ 08:17 UT ±00:01.
Orbital elements:
2004 RX10 Earth MOID = 0.0519 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 173.17522 (2000.0) P Q
n 1.11711790 Peri. 333.88286 -0.84536834 -0.53406607
a 0.9198917 Node 173.80099 +0.50649376 -0.80804342
e 0.3512638 Incl. 5.96219 +0.16975410 -0.24867502
P 0.88 H 21.3 G 0.15 U 5