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This is an engineering prototype, a thermal-mechanical unit, of one of two Hydrogen Alpha telescopes flown on the Apollo Telescope Mount designated H-alpha #2. These telescopes provided images of the sun in the red light of the hydrogen alpha line (6563 Angstroms) and were intended to locate areas of interesting solar activity and to aim and align the other solar observation instruments. Both telescopes were equipped to provide TV pictures and one of those (H-alpha #1) also provided a simultaneous photographic record.

NASA transferred the instrument to the NASM in June 1974.

 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 INSTRUMENTS-Scientific Manufacturer NASA Marshall Space Flight Center
 Dimensions 3-D: 146.1 x 22.9 x 34.9cm (57 1/2 x 9 x 13 3/4 in.)
 Materials Telescope - aluminum, brass, gold anodized
Optics - glass
 Inventory Number A19940092000 Credit Line Transferred from the National Aeronautics and Space Administration Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.