Kosmos 1074
From Spacefaring
Q1785036
Kosmos 1074 was a Soviet unmanned long-duration test flight of the Soyuz-T spacecraft launched on January 31, 1979 and de-orbited on April 1, 1979. It is the last Soyuz spacecraft that has received a Kosmos designation, and its mission is officially intended to investigate the upper atmosphere and outer space