Camera, Satellite Tracking, Baker-Nunn, Fork


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This is the fork support from the Baker-Nunn wide-field telescopic cameras that were built for, and used by, the Smithsonian Astrophysical Observatory. It attached to the baseplate and gimbal of the camera and supported it over a wide range of motion. In 1958, SAO established a worldwide network of 12 camera stations to photograph satellites slated to be launched during the International Geophysical Year. This component is from the initial camera sited at Oregon Pass, NM. It obtained the first civilian photograph of a satellite when Sputnik 1 flew over the Boller and Chivens Company in Pasadena, California while the camera was still being tested. The modified Schmidt type optics were designed by James Baker and manufactured by Perkin-Elmer while the camera proper and mounting were designed by Joseph Nunn and manufactured by Boller and Chivens Company.

The Smithsonian Astrophysical Observatory transferred the camera to NASM in December 1980 as part of a general suite of satellite ranging and tracking systems employed by SAO, including a laser-ranging system.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum

Credit Line

Transferred from Smithsonian Astrophysical Observatory


Steel, Paint, Rubber (Silicone), Aluminum, Glass, Cadmium Plating, Plastic


Storage (Rehoused on aluminum pallet): 273.1 × 121.9 × 136.5cm, 401kg (107 1/2 × 48 × 53 3/4 in., 884lb.)

Country of Origin

United States of America



Inventory Number


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