Orbital elements:
2010 ON101 PHA, Earth MOID = 0.0458 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 297.50460 (2000.0) P Q
n 0.47405888 Peri. 7.97936 -0.18193529 +0.97124714
a 1.6289754 Node 251.63926 -0.91086809 -0.22529220
e 0.4093507 Incl. 9.31078 -0.37043067 +0.07695730
P 2.08 H 20.5 G 0.15 U 2
The 220 - 490 metre wide asteroid 2010 ON101 made a close pass (65.9 lunar distances, 0.1693 AU), travelling at 11.46 km/second, to the Earth-Moon system on the 25th July, 2010 @ 23:12 UT. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Orbital elements: 2010 ON101 PHA, Earth MOID = 0.0451 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 13.55030 (2000.0) P Q n 0.48719511 Peri. 7.59435 -0.18200517 +0.97157772 a 1.5995609 Node 252.01241 -0.91031752 -0.22468523 e 0.3978208 Incl. 9.15708 -0.37174741 +0.07452032 P 2.02 H 20.4 G 0.15 U 8