A unique flight of the 7K-T/AF modification of the Soyuz spacecraft. The orbital module was dominated by the large Orion 2 astrophysical camera. The crew conducted astrophysical observations of stars in the ultraviolet range. Additional experiments included spectrozonal photography of specific areas of the earth's surface, and continued testing of space craft's on-board systems. Recovered December 26, 1973 8:50 GMT. Landed in snowstorm 200 km SW Karaganda.
Manned two crew. Docked with Salyut 6. Transported a team consisting of V A Lyakhov and V V Ryumin to the Salyut-6 space station to conduct scientific investigations and experiments and repair work. Recovered June 15, 1979 16:18 GMT. Returned unmanned.
Manned two crew. Carried Anatoli Berezovoi, Valentin Lebedev to Salyut 7 to conduct scientific research and experiments; returned crew of Soyuz T-7 to Earth. Docked with Salyut 7. Recovered September 1, 1982 15:04 GMT.
Retrieved and installed material samples. Tested equipment.