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Sputnik 20

Sputnik 20 (also known as 1962 Alpha Tau 1) was intended to be a Venus landing mission. The Venera-type spacecraft was successfully inserted into geocentric orbit[?] by the SL-6/A-2-e launcher. The escape stage failed and the spacecraft was stranded in Earth orbit until it re-entered the Earth's atmosphere 5 days later.

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