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Sun Sensor, Eye Block


Display Status:

This object is on display in the Boeing Aviation Hangar room at Steven F. Udvar-Hazy Center in Chantilly, VA.

Sun Sensor, Eye Block

Collection Item Summary:

Photoelectric sun sensing unit similar to those flown on the OSO series satellites. The OSO satellites consisted of a circular bus that rotated at 30 rpm and an upper sail-like section that carried solar cells and additional instruments. (see OSO-1; Catalogue # A19820270000). Signals from this sail-mounted sun sensor were fed to a servo-feedback mechanism to keep the upper portion instruments and solar cells pointed on the center of the sun within +/- 1 minute of arc. This device was transferred to NASM by NASA (GSFC) in 1988.

Collection Item Long Description:

Data Source

National Air and Space Museum


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

Manufactured for

NASA, Goddard Space Flight Center

Credit Line

Transferred from the National Aeronautics and Space Administration


Aluminum, glass optics


Other: 3 × 2 × 4 in. (7.6 × 5.1 × 10.2cm)

Country of Origin

United States of America


SPACECRAFT-Unmanned-Parts & Structural Components

Inventory Number


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