Vanguard 1 (ID: 1958-Beta 2 ) was the fourth artificial Earth satellite launched and the first satellite to be solar powered. Although communication with it was lost in 1964, it remains the oldest manmade satellite still in orbit. A three stage launch vehicle placed Vanguard into a 654x3,969 km, 134.2 minute elliptical orbit inclined at 34.25 degrees on March 17, 1958.
On this date, fifty years ago, the US Navy launched the Vanguard 1 satellite.
Vanguard 1 was a small earth-orbiting satellite designed to test the launch capabilities of a three-stage launch vehicle and the effects of the environment on a satellite and its systems in Earth orbit. Read more
The Vanguard I satellite , the world's oldest orbiting man-made satellite, launched from Cape Canaveral, Florida, in 1958, will mark its 50th year in space on March 17.