This is 1:48 scale model of the Atlas-Agena D. The Lockheed Missiles and Space Company began developing the Agena upper stage for the U.S. Air Force in 1956. The Agena-D was the last of three versions. As a second stage on Thor and Atlas boosters, it launched a variety of military and civilian payloads from 1961into the early 1970s. As a third stage on top of Titan IIIBs, the Agena-D launched numerous military payloads from 1966-1987. The Agena-D was used as the target vehicle for the manned Gemini rendevous and docking missions as well. NASA's Marshall Space Flight Center made this model and transferred to NASM in 1972.
This object is on display in James S. McDonnell Space Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.