The 310 - 680 metre wide asteroid 2011 WK15 will make a close pass (44.8 LD, 0.1151 AU) travelling at 7.02 km/second, to the Earth-Moon system on the 12th February 2015 @ 01:33 UT ±00:01.
Orbital elements:
2011 WK15 Earth MOID = 0.0919 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 249.34241 (2000.0) P Q
n 0.39205207 Peri. 72.07270 -0.98925665 -0.07053474
a 1.8488722 Node 103.73272 +0.01902892 -0.93057897
e 0.4736576 Incl. 7.57452 +0.14494547 -0.35923200
P 2.51 H 19.5 G 0.15 U 9