How close did asteroid 2005 YU55 get to Earth? Not close enough to endanger our civilization, but close enough to take some fun videos. Like this short film of its trajectory as it passed by recorded by NASA Swift's satellite.
This pixelated grayscale image was taken by the Arecibo Planetary Radar Facility in Puerto Rico on April 2010. It shows an asteroid the size of an aircraft carrier on direct interception course with Earth's orbit.