Asteroid 2012 KA will pass between earth and the orbit of the Moon on 17th May 2012
Asteroid 2012 KA, which is 4.5 to 10 m wide, is scheduled to pass Earth and the orbit of the moon on 17th May 2012. Asteroid 2012 KA was discovered just one day before its scheduled visit to earth on 16th May 2012. Asteroid 2012KA is predicted to make its closest approach to Earth at 19:43 UTC 17th May. The closest distance from the asteroid to Earth will be about about 224,397 kilometers (134,933 miles), which is about 0.6 times distance between Earth and Moon. The asteroid was discovered by the astronomers from Mt. Lemmon Observatory.
Orbit diagram of asteroid 2012 KA (courtesy JPL).
There is no chance that the asteroid will hit Earth. Most stoney meteoroids with less than 10m size, usually burned while entering Earth's atmosphere. Another asteroid with approximate size of a bus passed Earth and the orbit of the Moon on May 13 without making any harm.