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Aleksandr Ivanchenkov Biography »
Aleksandr Sergeyevich Ivanchenkov (Russian: Алекса́ндр Серге́евич Иванче́нков; born 1940) is a retired Soviet cosmonaut who flew as Flight Engineer on Soyuz 29 and Soyuz T-6, he spent 147 days, 12 hours and 37 minutes in space.