Near Earth flyby of asteroid 2010 FW9 on 28/03/2010
Distance: 725,055 mi (1,166,863km)
Estimated Diameter: 39 – 85ft (12 – 26m)
Relative Velocity 19841.5 mp/h (5.5mp/s – 8.87km/s)
More details at: http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010FW9;orb=1