The 73 - 160 metre wide asteroid 2001 QM142 will make a close pass (18.2 lunar distances, 0.0468 AU), travelling at 11.81 km/second, to the Earth-Moon system on the 17th September, 2012 @ 06:04 UT ±00:01.
Orbital elements:
2001 QM142 Earth MOID = 0.0341 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 326.19250 (2000.0) P Q
n 0.71791979 Peri. 292.60654 +0.10346683 -0.99342919
a 1.2352421 Node 151.32166 +0.94589712 +0.08307129
e 0.4284186 Incl. 5.85074 +0.30752765 +0.07872488
P 1.37 H 22.7 G 0.15 U 5