The 230 - 520 metre wide asteroid 2014 SM143 will make a close pass (11.2 lunar distances, 0.0288 AU) travelling at 18.10 km/second, to the Earth-Moon system on the 20th October 2014 @ 18:34 UT ±00:01.
Orbital elements:
2014 SM143 PHA, Earth MOID = 0.0054 AU
Epoch 2014 Dec. 9.0 TT = JDT 2457000.5 MPC
M 353.88242 (2000.0) P Q
n 0.74192771 Peri. 89.48790 -0.43222020 -0.87963170
a 1.2084490 Node 28.86809 +0.57268398 -0.43785457
e 0.4242464 Incl. 24.28729 +0.69657646 -0.18582639
P 1.33 H 19.9 G 0.15 U 8