The 20 - 45 metre wide asteroid 2009 WQ106 made a close pass (33.6 lunar distances, 0.0863 AU), travelling at 11.69 km/second, to the Earth-Moon system on the 3rd December, 2009. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Orbital elements: 2009 WQ106 Earth MOID = 0.0863 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 352.65946 (2000.0) P Q n 0.71407172 Peri. 44.68024 -0.35197489 -0.87150836 a 1.2396759 Node 68.74424 +0.72313261 -0.48480355 e 0.1687906 Incl. 21.49204 +0.59430035 +0.07374755 P 1.38 H 24.5 G 0.15 U 9