The 420 - 930 metre wide asteroid 2011 KP17 will make a close pass (48.9 lunar distances, 0.1257 AU), travelling at 10.77 km/second, to the Earth-Moon system on the 23rd August, 2011 @ 00:02 UT ±05:23.
Orbital elements:
2011 KP17 Earth MOID = 0.0813 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 356.25807 (2000.0) P Q
n 0.35970385 Peri. 179.55507 +0.98101571 +0.19273836
a 1.9581201 Node 169.25996 -0.17827937 +0.93984875
e 0.5534195 Incl. 6.60962 -0.07631935 +0.28202172
P 2.74 H 19.1 G 0.15 U 7