Soyuz TM-13 was the 13th mission and the tenth long-duration expedition to Mir space station. The mission began on October 2, 1991, 05:59:38 UTC, launching Commander Alexander Volkov, Research Cosmonaut/Flight Engineer Toktar Aubakirov and Research Cosmonaut Franz Viehböck, the first Austrian cosmonaut, into orbit. They docked with Mir two days later. During their stay there, cosmonauts performed EVAs, various station repair and maintenance tasks, and carried out scientific experiments in biology, geophysics, space technology, astronomy etc. They were visited by several Progress resupply spacecrafts, and welcomed aboard the Soyuz TM-14 crew.
The mission concluded with a safe landing back on Earth on March 25, 1992, 08:51:22 UTC.
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