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This unflown horizon sensor was part of the stabilization system used on Agena upper stages. These spacecraft were the first with 3-axis stabilization. Developed by Lockheed Missiles and Space, Agenas carried a number of civilian and military payloads into space from the late 1950s into the 1980s.

This horizon sensor was built by Barnes Engineering and NASA's Manned Spacecraft Center transferred it to the Museum in 1973.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type SPACECRAFT-Uncrewed-Guidance & Control Manufacturer Barnes Engineering
 Dimensions 3-D: 25.4 x 21.3 x 7.6cm (10 x 8 3/8 x 3 in.)
 Materials Anodized Aluminum, Aluminum, Adhesive, Unknown Plating
 Inventory Number A19731177000 Credit Line Transferred from NASA, Manned Spacecraft Center. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.