Named in honor of Antonio Crespo, electrical engineer at the Arecibo {see planet  (4337)} Observatory. For more than a decade, Crespo has been singularly responsible for maintaining the operational capability of the high-power transmitter used for all Arecibo planetary radar astronomy observations. The transmitter system is extremely complex; its outstanding performance throughout the 1980s is a credit to Crespo’s expertise and hard work. (M 16446) _ _.