Soyuz_26
Soyuz 26 (Russian: Союз 26, Union 26) was a Soviet space mission which launched the crew of Salyut 6 EO-1, the first long duration crew on the space station Salyut 6.[2]
The Soyuz spacecraft was launched on 10 December 1977, and docked with the space station the next day. Soyuz 27 arrived at the station in January 1978, and its two-person crew transferred into the Soyuz 26 spacecraft to undock and land a few days later.