The 160 - 350 metre wide asteroid 2005 HN3 will make a close pass (47.2 lunar distances, 0.1212 AU), travelling at 10.48 km/second, to the Earth-Moon system on the 5th July, 2013 @ 13:20 UT ±00:01.
Orbital elements: 2005 HN3 PHA 0.015 Epoch 2005 Apr. 20.0 TT = JDT 2453480.5 MPC M 113.59542 (2000.0) P Q n 1.24766783 Peri. 6.11594 +0.41227173 -0.90326267 a 0.8545485 Node 59.59165 +0.82992836 +0.31848433 e 0.3362793 Incl. 7.92750 +0.37583365 +0.28754873 P 0.79 H 21.1 G 0.15 From 26 observations 2005 Apr. 21-22.