The 95 - 210 metre wide asteroid 2004 HZ has made a close pass (68.8 lunar distances, 0.1767 AU), travelling at 18.62 km/second, to the Earth-Moon system on the 17th April, 2010.
The magnitude: 22.26, 94 - 210 metre sized NEO 2004 HZ is to have a near-Earth Flyby on April 25th, 2007. On that date the miss distance is currently listed at 0.0303AU. There is however an impact risk on 18th October 2023, with an impact probability of 9.1e-08.
Asteroid 2004 HZ had a near-Earth Flyby (0.094 AU) on May 3rd 2004. Velocity: 14.21 km/sec Diameter: 0.120 km Mass: 2.3e+09 kg