The 210 - 480 metre wide asteroid 2010 HZ103 will make a close pass (20.6 lunar distances, 0.0531 AU), travelling at 12.59 km/second, to the Earth-Moon system on the 12th August, 2010.
Orbital elements: 2010 HZ103 PHA, Earth MOID = 0.0334 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 348.81212 (2000.0) P Q n 0.83904381 Peri. 173.44206 +0.64316755 +0.71617840 a 1.1133019 Node 136.11664 -0.71910263 +0.68651749 e 0.1200679 Incl. 23.01048 -0.26311007 -0.12562737 P 1.17 H 20.6 G 0.15 U 8