It's baaaaack! A possible case of 'roids so bad, even an ocean full of Preparation H couldn't give comfort: the November reappearance of Asteroid 2005 YU55. Coincidentally, I'm currently listening to an audio book format of Bill Bryson's "A Short History of Nearly Everything" and am on the section about the Manson Crater and asteroid-caused extinction events in Earth's history. The Manson Crater, considered have caused widespread death and destruction during the Cretaceous Period 74 million years ago, was not considered to have been responsible for any extinctions. It is guessed to have been about 2 kilometers in diameter, 5 times the size of Asteroid 2005 YU55.
Asteroid 2005 YU55 to Approach Earth on November 8, 2011
It was here last year too: Potentially Dangerous Asteroid Spotted Passing Earth | Space.comNear-Earth asteroid 2005 YU55 will pass within 0.85 lunar distances from the Earth on November 8, 2011. The upcoming close approach by this relatively large 400 meter-sized, C-type asteroid presents an excellent opportunity for synergistic ground-based observations including optical, near infrared and radar data. The attached animated illustration shows the Earth and moon flyby geometry for November 8th and 9th when the object will reach a visual brightness of 11th magnitude and should be easily visible to observers in the northern and southern hemispheres. The closest approach to Earth and the Moon will be respectively 0.00217 AU and 0.00160 AU on 2011 November 8 at 23:28 and November 9 at 07:13 UT.
List of Visible Craters in the US-Meteor Craters-Impact Craters