Country of Origin: United States of America
Overall: 6 in. diameter (15.2cm); antennae extend to a volume equivalent of a 2 foot diameter sphere.
This is one of several replicas of the Vanguard 1 satellite in the NASM collection. Vanguard 1 was the second American satellite to orbit the Earth on 17 March 1958. The provenance of this object is unknown. Solar panels appear to be intact.