Orbital elements:
2008 RM98 PHA, Earth MOID = 0.0089 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 326.70420 (2000.0) P Q
n 0.23990587 Peri. 166.01536 -0.02375756 -0.99923000
a 2.5651266 Node 285.33897 +0.91408257 -0.00906395
e 0.6373110 Incl. 1.85546 +0.40483162 -0.03817407
P 4.11 H 20.4 G 0.15 U 0
The 220 - 500 metre wide asteroid 2008 RM98 made a close pass (45.5 Lunar Distances, 0.1168 AU) to the Earth-Moon system on the 6th February 2009. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).