The idea of getting images via radar, though not new, is still quite imaginative.
This technology and the resulting images are quite interesting. (To me at least.) (The 1999KW4 smaller object spinning around the larger object is pretty wild! Imagine standing on 1999KW4 and seeing the rock zip over your head!) Use the "pull-downs" to see more images.
This is part of a CalTech public web site maintained by JPL.