Update The 140 - 310 metre wide asteroid 2010 HC will make a close pass (46.8 lunar distances, 0.1202 AU), travelling at 7.35 km/second, to the Earth-Moon system on the 27th June, 2010 @ 11:11 UT.
The 150 - 340 metre wide asteroid 2010 HC will make a close pass (46.3 lunar distances, 0.1190 AU), travelling at 7.39 km/second, to the Earth-Moon system on the 26th June, 2010.
Orbital elements: 2010 HC Earth MOID = 0.0919 AU Epoch 2010 Apr. 14.0 TT = JDT 2455300.5 MPC M 338.41884 (2000.0) P Q n 0.31588445 Peri. 246.42021 -0.04993894 +0.99784982 a 2.1352589 Node 20.85086 -0.86735668 -0.02225804 e 0.5218612 Incl. 6.84924 -0.49517521 -0.06164666 P 3.12 H 21.1 G 0.15 From 32 observations 2010 Apr. 17-18.