The 10 - 22 metre wide asteroid 2014 SS143 will make a close pass (3.6 lunar distances, 0.0093 AU), travelling at 11.67 km/second, to the Earth-Moon system on the 29th September 2014 @ 07:42 UT ±00:01.
Orbital elements:
2014 SS143 Earth MOID = 0.0063 AU
Epoch 2014 Dec. 9.0 TT = JDT 2457000.5 MPC
M 12.09548 (2000.0) P Q
n 0.54433486 Peri. 259.92726 +0.26671074 -0.96377245
a 1.4855660 Node 174.60161 +0.89563180 +0.24676504
e 0.4579421 Incl. 1.72701 +0.35596217 +0.10124067
P 1.81 H 27.0 G 0.15 U 7
