Housing, Hemispherical Resonator Gyroscope (HRG)


Display Status:

This object is on display in the Time and Navigation exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

This is the housing for a Hemispherical Resonator Gyro (HRG). An HRG senses acceleration by the change in phase of vibration of a cup-shaped resonator, similar to the way a wine-glass resonates when rubbed by a wet finger. The device is rugged and accurate, and it has replaced other models of mechanical gyroscopes on most deep-space missions, as well as in other applications.

Northrop Grumman donated this to the Museum in 2011.

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

Gift of Northrop Grumman.


  • Case: Metal, probably aluminum.
  • Wire connector, Iron alloy, plastic, quartz, gold plating


3-D: 11.1 x 11.7 x 6.7cm (4 3/8 x 4 5/8 x 2 5/8 in.)

Country of Origin

United States of America


SPACECRAFT-Unmanned-Guidance & Control

Inventory Number


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