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Alignment Optical Telescope, Lunar Module Simulator

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Display Status:

This object is on display in the Human Spaceflight exhibition at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Collection Item Summary:

The optical device which the astronauts used for navigation while in the Apollo Lunar Module (LM) was an alignment optical telescope (AOT). The AOT was a periscope-type device that protruded through the top of the LM. The astronauts used AOT to make direct visual sightings and record precise angular measurements of pairs of celestial objects. This information was transferred to the Module's guidance computer, which determined the spacecrafts attitude and permitted the alignment of its inertial guidance system.

This functioning AOT was originally part of the Lunar Module Simulator used for mission training by the astronauts at the Kennedy Space Center. The Lunar Module Simulator, including the telescope, had been transferred to the Smithsonian in 1974 but, because of its size, remained in storage at the Kennedy Space Center for nearly 25 years. It was subsequently removed from the simulator's crew compartment to facilitate treatment by the NASM conservation staff. A replica was provided for the Lunar Module Simulator display.

Transferred from NASA to the Museum in 1975.

Collection Item Long Description:

Data Source

National Air and Space Museum

Rights

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

Manufacturer

Kollsman Instrument Company

Designer

MIT Instrumentation Laboratory

Credit Line

Transferred from the National Aeronautics and Space Administration, Kennedy Space Center.

Materials

Beryllium, thorated glass, other metals

Dimensions

  • Other (barrel diameter): 3 1/8 in. (7.9cm)
  • 3-D: 83.8 x 25.4 x 15.2cm, 10kg (33 x 10 x 6 in., 22lb.)

See more items in

National Air and Space Museum Collection

Country of Origin

United States of America

Type

SPACECRAFT-Manned-Guidance & Control

Inventory Number

A19751446001