Close Approach By Asteroid 2012 BX34
An anonymous reader writes with news that asteroid 2012 BX34, 11 meters wide, is in the process of passing within 60,000km of Earth — about a fifth of the distance between the Earth and the Moon. At that size, the asteroid would pose no danger even if it hit the Earth's atmosphere.
nope, stony asteroid has to be about 35 meters or more in diameter to "make a dent", otherwise it will just burn up in atmosphere.