The 82 - 180 metre wide asteroid 2009 WW104 will make a close pass (15.3 lunar distances, 0.0392 AU), travelling at 12.20 km/second, to the Earth-Moon system on the 23rd June, 2011 @ 23:44 UT ±23:13.
Orbital elements: 2009 WW104 Earth MOID = 0.0359 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 53.33653 (2000.0) P Q n 0.51633513 Peri. 84.33311 +0.92727356 +0.35479509 a 1.5387979 Node 254.84105 -0.37336777 +0.85285742 e 0.4684874 Incl. 7.11291 -0.02757251 +0.38308571 P 1.91 H 22.6 G 0.15 U 9