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| Soyuz TM-12 | |
|---|---|
| Name | Soyuz TM-12 |
| Mission type | Crewed transport to Mir |
| Operator | Roscosmos |
| Cospar id | 1991-083A |
| Satcat | 21700 |
| Mission duration | 179 days, 1 hour, 17 minutes, 43 seconds (expedition increment) |
| Spacecraft type | Soyuz-TM |
| Manufacturer | NPO Energia |
| Launch mass | 7150 kg |
| Launch date | 1991-05-19 UTC |
| Launch rocket | Soyuz-U2 |
| Launch site | Baikonur Cosmodrome |
| Landing date | 1991-11-14 UTC |
| Landing site | Kazakhstan |
Soyuz TM-12 was a 1991 crewed mission to the Mir orbital complex that carried a multinational crew combining Soviet cosmonauts and an international visiting astronaut. Launched in May 1991 during the final months of the Soviet Union, the flight supported increment operations on Mir, performed medical and materials research, and continued international cooperation that involved Interkosmos, European Space Agency, and Japanese participation. The mission returned to Earth in November 1991 after long-duration activities and exchange of expedition members.
The flight occurred amid geopolitical change as the Soviet Union moved toward dissolution, intersecting with programs and institutions such as NPO Energia, TsUP, Gagarin Cosmonaut Training Center, and international partners including European Space Agency, JAXA, and national agencies from France, Austria, and Japan. Soyuz TM-12 supported ongoing Mir expeditions, docking operations with Mir's Kristall module, and provided crew rotation and logistics for the long-duration Mir EO-9 increment. The mission interacted operationally with visiting modules, supply ships like Progress M variants, and ground networks in Krasnodar, Yevpatoria, and other tracking assets.
The three-person crew reflected multinational participation. Crewmembers included experienced Roscosmos cosmonauts trained at the Yuri Gagarin Cosmonaut Training Center and an international guest from the Interkosmos or national astronaut program. The mission involved personalities linked to prior flights and institutions such as Soyuz T-11, Soyuz TM-3, Soyuz TM-4, Valeri Polyakov, Sergei Krikalev, Alexander Viktorenko, Anatoly Artsebarsky, Musa Manarov, Vladimir Titov, Gennady Manakov, and visiting astronauts comparable to Toyohiro Akiyama and Jean-Loup Chrétien in terms of international presence. The crew conducted operations coordinated with flight controllers at TsUP, medical researchers at the Institute of Biomedical Problems, and scientific teams from partner institutions.
The Soyuz-TM series, produced by NPO Energia and based on the original Soyuz lineage, featured improvements such as the Kurs automatic rendezvous system and upgraded avionics. Soyuz TM-12 launched on a Soyuz-U2 rocket from Baikonur Cosmodrome Site 1/5, integrated with payload processing at the Baikonur Cosmodrome processing facilities and supervised by launch authorities including RKA predecessors and site management. The spacecraft was prepared alongside support vehicles like Progress M logistical freighters and used standard orbital procedures influenced by prior vehicles such as Soyuz TM-11, Soyuz TM-13, and testbeds from OKB-1 heritage.
After launch, Soyuz TM-12 executed orbital insertion and a phasing profile to approach Mir using rendezvous techniques developed from earlier missions such as Soyuz TM-4 and Soyuz TM-10. Docking occurred with Mir's Core Module or adjacent modules depending on station configuration, following orbital adjustments planned by TsUP and flight dynamics teams linked to institutions like Institute of Applied Astronomy. While docked, the crew supported long-duration increment handover with other resident cosmonauts from expeditions such as Mir EO-9 and coordinated with visiting vehicles including Progress resupply ships. The mission encompassed planned EVAs and internal module transfers patterned on earlier Mir operations exemplified by activities with Kristall, Spektr, and Priroda concepts.
Crew members conducted biomedical studies with partners such as the Institute of Biomedical Problems and collaborated with European and Japanese investigators from organizations like CNES, DLR, ESA, and national institutes in France, Austria, and Japan. Experiments included human physiology investigations related to long-duration spaceflight similar to those performed by Valeri Polyakov and Sergei Krikalev, materials processing studies using furnace hardware analogous to European microgravity materials programs, remote sensing and Earth observation coordinated with Hydrometeorological Service (Roshydromet), and technology demonstrations relevant to docking and station systems. Operational tasks included life support maintenance on Mir's Elektron systems, power management with solar arrays, thermal control activities influenced by lessons from Salyut platforms, and logistics handling involving Progress M rendezvous support. International outreach and media engagements connected the crew to broadcasters and research centers in Tokyo, Vienna, Paris, and Moscow.
Soyuz TM-12 returned after months docked to Mir, landing on the steppes of Kazakhstan with recovery forces from Russian Air Force and civil teams drawn from Baikonur support units. The mission contributed to long-term medical datasets that informed later flights such as Mir EO-11 and Mir EO-12 and aided multinational cooperation frameworks that evolved into partnerships with ESA, JAXA, and later the International Space Station. Lessons in docking, life support, and international astronaut integration influenced spacecraft design by NPO Energia and operational doctrine at TsUP and successor organizations. The flight remains part of the operational lineage bridging Soviet space program endeavors and post-Soviet Russian human spaceflight, linked historically to milestones like Mir continuous occupancy and the transition toward International Space Station collaboration.
Category:Crewed Soyuz missions Category:1991 in spaceflight