Launch from Baikonur; landing 225 km southeast of Dzheskasgan. Ninth Interkosmos-mission. Docking on Salyut 6 spacestation as final spacecraft and common work with the fifth resident crew.

Scientific research and experiments including exploration of Earth magnetic field. Earth observations had to be delayed until the last day of this mission, when Salyut 6 at last passed over Romania in daylight. During this time the crew also tested the station's orientation system.