The 31 - 70 metre wide asteroid 2009 WN8 made a close pass (10.6 Lunar Distances, 0.0272 AU), travelling at 11.28 km/s, to the Earth-Moon system on the 18th November, 2009.
Orbital elements: 2009 WN8 Earth MOID = 0.0150 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 162.23773 (2000.0) P Q n 1.26137546 Peri. 220.72993 +0.15066357 +0.97011015 a 0.8483462 Node 58.74690 -0.83941910 +0.22718075 e 0.3599402 Incl. 12.85705 -0.52218394 -0.08529484 P 0.78 H 24.6 G 0.15 U 9