The 400 - 890 metre wide asteroid 1991 JW will make a close pass (37.1 Lunar Distances, 0.0952 AU), travelling at 7.82 km/s, to the Earth-Moon system on the 28th November, 2010 @ 21:49 UT.
The 390 - 870 metre wide asteroid 1991 JW will make a close pass (31.6 Lunar Distances, 0.0812 AU), travelling at 5.08 km/s, to the Earth-Moon system on the 23rd May, 2009.