You are here

Photometers, UV, OGO-4


Display Status:

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

Collection Item Summary:

Two flight spare units for the ultraviolet photometers flown on OGO-4 for airglow and Lyman alpha studies. These are simple ionization chambers set behind filters of varying substances and thicknesses, typically lithium fluoride. Orbiting Geophysical Observatory 4 was launched in July 1967. The photometers were transferred to NASM by the Naval Research Laboratory in July 1982.

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

Credit Line

Transferred from the Naval Research Laboratory


  • Magnesium and aluminum casings
  • Glass
  • Electronics


Overall: 7 in. tall x 8 in. wide x 3 in. deep (17.8 x 20.3 x 7.6cm)

Country of Origin

United States of America


SPACECRAFT-Unmanned-Parts & Structural Components

Inventory Number


Related Topics