Venera 2MV-1 No.2, also known as Sputnik 20 in the Western world, was a Soviet spacecraft, which was launched in 1962 as part of the Venera programme. Due to a problem with its upper stage it failed to leave low Earth orbit, and reentered the atmosphere a few days later. It was the second of two Venera 2MV-1 spacecraft, both of which failed to leave Earth orbit. The previous mission, Venera 2MV-1 No.1, was launched several days earlier. Venera 2MV-1 No.2 was launched at 02:12:30 UTC on 1 September 1962, atop a Molniya 8K78 carrier rocket flying from Site 1/5 at the Baikonur Cosmodrome. The lower stages of the rocket operated nominally, injecting the fourth stage and payload into a low Earth orbit.

Wikipedia: https://en.wikipedia.org/wiki/Sputnik_20. Original timeline Wikipedia link: https://en.wikipedia.org/wiki/Sputnik_program. Related NASA reference: https://nssdc.gsfc.nasa.gov/planetary/chronology.html#1962. Description adapted from Wikipedia contributors (CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/).