Vanguard 1
Artificial satellite
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Vanguard 1 is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched, following Sputnik 1, Sputnik 2, and Explorer 1. It was launched 17 March 1958. Vanguard 1 was the first satellite to have... Wikipedia
Launch date: March 17, 1958
Manufacturer: United States Naval Research Laboratory
Launch site: Launch Complex 18
COSPAR ID: 1958-002B
Decay date: 2198 (estimated); ~ 240 years orbital lifetime
Dimensions: 152 mm (6.0 in) diameter, 3.0 ft (0.91 m) antenna span
Inclination: 34.25°
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