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This is a full-scale replica of the Vanguard Magnetometer satellite, designated SLV-5 or Vanguard 3a. It was designed to study the Earth's magnetic field. The magnetometer sensor was at the end of the cylindrical boom to avoid interference from the other instruments. The satellite was launched on April 13, 1959 but failed to go into orbit due to loss of control during first stage separation. This replica was manufactured at the Naval Research Laboratory from original components. It was refurbished at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975. It was displayed in the Satellites Gallery (1976-1984).

 Display Status

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

Space Science
Object Details
Country of Origin United States of America Type SPACECRAFT-Uncrewed Manufacturer Naval Research Laboratory
 Dimensions Overall: 2 ft. 6 in. tall x 1 ft. 1 in. wide, 25 lb. (76.2 x 33.02cm, 11.3kg)
Other (antennae): 2 ft. long (60.96cm)
 Materials Metallic shell, phenolic mast
 Alternate Name Vanguard 3 satellite Inventory Number A19751407000 Credit Line Transferred from the National Aeronautics and Space Administration Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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