This is a model of unknown scale of the AIM-54A, the earliest version of several Phoenix air-to-air missiles built by Hughes exclusively for use on the U.S. Navy's F-14 Tomcat. It has a solid-fuel motor, a maximum speed of Mach 3.8, a range of over 115 miles, a conventional warhead, and is radar guided. First deployed in 1974, there are a limited number of AIM-54As still in service. John and Cynthia Heyde donated this model to NASM on an unknown date.
This object is on display in James S. McDonnell Space Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.