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| Soyuz TM-21 | |
|---|---|
| Name | Soyuz TM-21 |
| Mission type | Crewed transport |
| Operator | Roscosmos / Russian Space Agency |
| Mission duration | 179 days, 1 hour, 41 minutes |
| Spacecraft | Soyuz-TM No.21 |
| Manufacturer | NPO Energia |
| Launch mass | 7200 kg |
| Launch date | 1995-03-14 |
| Launch rocket | Soyuz-U2 |
| Launch site | Baikonur Site 1/5 |
| Landing date | 1995-09-10 |
| Landing site | Kazakhstan |
| Orbit reference | Geocentric orbit |
| Orbit regime | Low Earth orbit |
| Apsis | gee |
Soyuz TM-21 Soyuz TM-21 was a 1995 Soviet/Russian crewed flight of a Soyuz-TM vehicle that delivered an international expedition to the Mir space station. The mission formed part of ongoing Mir EO-18 operations and intersected with cooperative programs involving NASA, ESA partners, and national space agencies from France, Kazakhstan, and other states. It exemplified post-Soviet multinational crewed access to low Earth orbit during the 1990s.
The mission took place amid the transitional era of the Russian space program following the dissolution of the Soviet Union, involving organizations such as Roskosmos and industrial entities like NPO Energia. Objectives included crew transport, long-duration habitation on Mir, and execution of experiments linked to cooperative initiatives with NASA, CNES, DASA, DLR, ASI, JAXA, and other agencies. Scientific goals encompassed biomedical research aligned with institutes such as Institute of Biomedical Problems and materials science tasks coordinated with facilities like Kurchatov Institute. Political and diplomatic aims involved fostering ties with nations including France, Kazakhstan, Ukraine, and United States through space diplomacy.
The three-person crew combined career cosmonauts and an international participant representing France, reflecting prior collaborations with agencies such as CNES and figures connected to Institut national des sciences appliquées. Crew members were drawn from training centers including GCTC and institutions like Bauman Moscow State Technical University. The spacecraft, a Soyuz-TM series capsule built by NPO Energia, integrated systems tested on predecessors like Soyuz TM-20 and hardware heritage tracing to earlier models such as Soyuz TMA and Soyuz-U. Mission support involved launch operations by Progress Rocket Space Centre and range services at Baikonur Cosmodrome overseen historically by entities like TsAGI.
Launched atop a Soyuz-U2 rocket from Baikonur Site 1/5, the ascent profile drew on trajectories similar to those used in missions like Soyuz TM-18 and Soyuz TM-19. Launch operations coordinated with range control and telemetry centers including TsUP and relied on tracking assets such as the Global Tracking and Data Relay Satellite System-era ground stations. The rendezvous and docking sequence employed automated systems related to the Kurs rendezvous system and manual backup procedures trained at GCTC. Docking to Mir followed procedures refined during expeditions like Mir EO-17 and earlier Salyut operations.
Onboard Mir, the crew integrated into ongoing station operations, interfacing with modules like Kvant-1, Kvant-2, Kristall, Spektr, and Priroda and working alongside resident crews of expeditions such as Mir EO-18 and visiting crews reminiscent of Shuttle–Mir Program interactions. Scientific activities spanned biomedical studies coordinated with the Institute of Biomedical Problems, materials science in furnaces analogous to Kvant-2 hardware, Earth observation drawing on instruments used by projects like Soviet space program remote sensing, and technology demonstrations relevant to future stations like International Space Station. International experiments involved institutions including CNES, ESA, DLR, and universities such as Moscow State University and University of Paris. Logistics operations encompassed Progress resupply coordination, EVA preparations referencing suits from Orlan series, and life-support maintenance rooted in systems developed by NPO Energia.
After completing its primary objectives and rotating crew assignments consistent with practices from missions like Soyuz TM-20 and Soyuz TM-22, the spacecraft undocked and executed deorbit burns managed by guidance systems derived from Glonass-era navigation aids and onboard avionics maintained by NPO Energia. The descent profile culminated in a targeted landing in the steppes of Kazakhstan within recovery zones used since the Vostok era, where search and rescue teams from units associated with Russian Air Force and civil authorities conducted retrieval. Medical debriefs involved specialists from Institute of Biomedical Problems and rehabilitation programs linked to GCTC.
Soyuz TM-21 contributed to multinational cooperation preceding the International Space Station era, reinforcing partnerships among Russia, United States, France, ESA, and other participants. The mission's technological, operational, and biomedical outcomes informed later projects such as Shuttle–Mir Program collaborations, hardware evolutions toward Soyuz-TMA, and long-duration life support strategies applied on International Space Station. It underscored the continuity of crewed Russian access to Low Earth orbit and bolstered institutional ties involving Roscosmos, NPO Energia, CNES, NASA, and numerous research institutes and universities. Category:Soyuz missions