A bit too close for comfort

BBC News - Asteroid to make near-miss fly-by

An asteroid will pass by the Earth on Friday in something of a cosmic near-miss, making its closest approach at about 1600 GMT.

The asteroid, estimated to be about 11m (36ft) in diameter, was first detected on Wednesday.
At its closest, the space rock - named 2012 BX34 - will pass within about 60,000km of Earth - less than a fifth of the distance to the Moon.....

Earlier estimates put the asteroid's closest distance at as little as 20,000km, near the distance at which geostationary satellites reside, but observations by observatories overnight showed it will pass at a more comfortable distance.

Just goes to show what I noted in 2010 - small, city killing asteroids may turn up suddenly and there isn't much we can do about it.

Update:  from a 2008 Scientific American article:

Improved telescopes would identify an estimated one million near-Earth objects over the next decade to 15 years, and 8,000 to 10,000 of them will have some probability of hitting the planet, Schweickart says. A hit by even one of the smaller rocks, say the size of a convenience store, would have the impact of 400,000 Hiroshima nuclear bombs exploding at once, he says.

Isn't it odd how little publicity such a close passing potential disaster attracts in the media?