Update: The 100 - 230 metre wide asteroid 2009 WD11 will make a close pass (35.5 Lunar Distances, 0.0913 AU), travelling at 12.19 km/s, to the Earth-Moon system on the 17th December, 2009. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
The 110 - 250 metre wide asteroid 2009 WD11 will make a close pass (34.6 Lunar Distances, 0.0890 AU), travelling at 12.90 km/s, to the Earth-Moon system on the 17th 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 WD11 Earth MOID = 0.0726 AU Epoch 2009 Nov. 5.0 TT = JDT 2455140.5 MPC M 262.75727 (2000.0) P Q n 0.88838073 Peri. 127.34564 -0.95938891 +0.20975108 a 1.0716919 Node 65.46581 -0.27559403 -0.83958812 e 0.4286155 Incl. 11.96650 +0.06017344 -0.50109508 P 1.11 H 21.8 G 0.15 From 25 observations 2009 Nov. 20-21.