The 300 - 700 metre wide asteroid 2005 XN4 made a close pass (0.342 AU), travelling at 37.35 km/second, to the Earth-Moon system on the 10th June, 2011 @ 02:17 UT ±00:01.
Orbital elements:
2005 XN4 Earth MOID = 0.1518 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 49.40405 (2000.0) P Q
n 0.38305470 Peri. 93.60033 -0.51933851 -0.29781998
a 1.8777115 Node 70.74065 -0.23138640 -0.85328925
e 0.5813912 Incl. 58.04657 +0.82264685 -0.42801952
P 2.57 H 19.8 G 0.15 U 1