The 180 - 410 metre wide asteroid 2010 GU21 will make a close pass (8.0 lunar distances, 0.0204 AU), travelling at 10.66 km/second, to the Earth-Moon system on the 5th May, 2010.
Orbital elements: 2010 GU21 PHA, Earth MOID = 0.0093 AU Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 16.04036 (2000.0) P Q n 0.30445428 Peri. 201.20442 -0.20288446 +0.97807971 a 2.1883729 Node 57.11761 -0.89017779 -0.16428084 e 0.5628200 Incl. 3.20031 -0.40794778 -0.12795269 P 3.24 H 20.8 G 0.15 U 7