The 100 - 230 metre wide asteroid 2011 BY24 will make a close pass (54.9 lunar distances, 0.1411 AU), travelling at 10.28 km/second, to the Earth-Moon system on the 4th March, 2011 @ 15:06 UT ±02:00.
Orbital elements: 2011 BY24 Earth MOID = 0.0171 AU Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC M 355.07992 (2000.0) P Q n 0.36402966 Peri. 325.28070 -0.90492705 -0.42344428 a 1.9425768 Node 189.94227 +0.42440849 -0.89060903 e 0.5063104 Incl. 14.23284 +0.03137622 -0.16586289 P 2.71 H 22.2 G 0.15 U 9