Impressive radar images of near-Earth asteroid 2007 PA8 were taken during its recent fly-by of Earth.
The images … reveal possible craters, boulders, an irregular, asymmetric shape, and very slow rotation. The asteroid measures approximately one mile wide (about 1.6 kilometers).
The asteroid poses no threat to Earth. The resolution of the images, however, is astonishing, especially considering it was done by radar.