The 260 - 580 metre wide asteroid 2009 XO will make a close pass (30.9 lunar distances, 0.0795 AU), travelling at 14.78 km/second, to the Earth-Moon system on the 8th January, 2010. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Orbital elements: 2009 XO PHA, Earth MOID = 0.0475 AU Epoch 2009 Nov. 25.0 TT = JDT 2455160.5 MPC M 333.08457 (2000.0) P Q n 0.36203371 Peri. 101.05764 -0.81959096 -0.57292199 a 1.9497101 Node 43.98842 +0.52248885 -0.75136399 e 0.4696283 Incl. 0.45967 +0.23510859 -0.32743328 P 2.72 H 20.0 G 0.15 From 24 observations 2009 Dec. 9.