The 260 - 590 metre wide asteroid 2012 JS11 will make a close pass (27.7 lunar distances, 0.0712 AU), travelling at 12.60 km/second, to the Earth-Moon system on the 30th September, 2012 @ 12:51 UT ±00:05.
Orbital elements:
2012 JS11 Earth MOID = 0.0726 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 325.91663 (2000.0) P Q
n 0.19649056 Peri. 120.97515 +0.87851180 +0.47004713
a 2.9302741 Node 211.22320 -0.47486674 +0.83975285
e 0.6748835 Incl. 9.46906 -0.05214009 +0.27179192
P 5.02 H 19.7 G 0.15 U 9