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Sputnik 19

Sputnik 19 was a Venera-type spacecraft intended to make a landing on Venus. The SL-6/A-2-e launcher put the spacecraft into Earth orbit, but the escape stage failed and the probe remained in geocentric orbit[?] for three days until the orbit decayed on August 28 and it re-entered Earth's atmosphere.

US Naval Space Command Satellite Situation Summary[?] identified this vechile as Sputnik 23. It is also known as Alpha Pi 1.

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