Ivan Ivanovich (Vostok programme)

Ivan Ivanovich (Иван Иванович, the Russian equivalent of "John Doe") was the name given to a mannequin used in testing the Soviet Vostok spacecraft in preparation for its crewed missions.

He was dressed in a cosmonaut suit and strongly resembled a dead person; for this reason, a sign reading "МАКЕТ" (Russian for "dummy") was placed under his visor so that anyone who found him after his missions would not think he was a corpse or an alien.

[2] Ivan first flew into space on Korabl-Sputnik 4 on 9 March 1961, accompanied by a dog named Chernushka, various reptiles, and 80 mice and guinea pigs, some of which were placed inside his body.

His second space flight, Korabl-Sputnik 5, on 26 March 1961, was similar – he was again accompanied by a dog, Zvyozdochka, and other animals, which include guniea pigs, frogs, monkeys, mice, rats, and flies.

[3] Since 1997, he has been on loan to the National Air and Space Museum, where he was on display, still in his spacesuit, until 2017 when he was moved back into the private collection of Ross Perot.