Arecibo radar image of 1950 DA on 4 March 2001, from a distance of 0.052 AU (22 lunar distances). Vertical resolution is 15 m and horizontal resolution is 0.125 Hz (7.9 mm s^-1 in radial velocity). Image from S. Ostro (JPL).
NASA/JPL
2001-03-04
<a rel="nofollow" class="external free" href="http://neo.jpl.nasa.gov/1950da/radar_bw_scale.gif">http://neo.jpl.nasa.gov/1950da/radar_bw_scale.gif</a>