Soyuz T-12


Soyuz T-12 (also known as Salyut 7 EP-4) was the seventh crewed spaceflight to the Soviet space station Salyut 7. The name "Soyuz T-12" is also the name of the spacecraft used to launch and land the mission's three-person crew. The mission occurred in July 1984, during the long-duration expedition Salyut 7 EO-3. During the mission, crew member Svetlana Savitskaya became the first woman to ever perform a spacewalk, and the potential Buran space shuttle pilot, Igor Volk, was given spaceflight experience. Unlike many Soyuz visiting missions, the Soyuz lifeboats were not swapped, and the crew returned to Earth in the same spacecraft in which they launched.

Soyuz T-12
COSPAR ID1984-073A Edit this at Wikidata
SATCAT no.15119
Mission duration11 days, 19 hours, 14 minutes, 36 seconds[1]
Orbits completed186
Spacecraft properties
Spacecraft typeSoyuz-T
ManufacturerNPO Energia
Launch mass7,020 kilograms (15,480 lb)
Crew size3
MembersVladimir Dzhanibekov
Svetlana Savitskaya
Igor Volk
CallsignPamir (Pamir Mountains)
Start of mission
Launch dateJuly 17, 1984, 17:40:54 (1984-07-17UTC17:40:54Z) UTC
Launch siteBaikonur 31/6
End of mission
Landing dateJuly 29, 1984, 12:55:30 (1984-07-29UTC12:55:31Z) UTC
Landing site140 kilometres (87 mi) SE of Dzhezkazgan
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude192 kilometres (119 mi)
Apogee altitude218 kilometres (135 mi)
Inclination51.6 degrees
Period88.6 minutes
Docking with Salyut 7
1985 CPA 5654.jpg
Soyuz T-12 with spacewalk
Soyuz programme
(Crewed missions)


Igor Volk was a test pilot, and was planned to be the commander of the first Buran spaceflight. The rule introduced following the Soyuz 25 failure, insisted that all Soviet spaceflight must have at least one crew member who has been to space before. As a result, it was decided that Volk should have spaceflight experience, and he was originally scheduled to visit Salyut 7 in 1983.[2] But following the failure of Soyuz T-8 to dock to Salyut 7, in April 1983, the Soyuz launch schedule was disrupted, and Volk's original crew members, Kizim and Solovyov, were rescheduled elsewhere.[2] They later became long-duration crew members of Salyut 7 EO-3, and Volk was scheduled fly in the passenger seat of a visiting mission Soyuz T-12 to the EO-3 crew, but the other members of the T-12 mission were not yet decided upon.[2]

In November 1983, NASA announced that during STS-41-G, Kathryn D. Sullivan would become the first woman to perform a spacewalk.[2] The NPO Energia chief decided that the Soviets would get there first, and assembled the Soyuz T-12 crew within a month of NASA's announcement, which included Volk as previously planned.

The back-up crew lists became available to Western space analysts in 1988, and they noted that the back-up crew contained a woman, but did not contain another LII test pilot. Judging from this, it appeared that, as reasons to have the Soyuz T-12 mission, achieving the first female spacewalk was more important than gaining experience for a potential Buran crew member.[2]

At the time of the mission the Buran program was still a state secret. The appearance of Volk as a crew member caused some, including the British Interplanetary Society magazine Spaceflight, to ask why a test pilot was occupying a Soyuz seat usually reserved for researchers or foreign cosmonauts.[2]


Position Crew
Commander   Vladimir Dzhanibekov
Fourth spaceflight
Flight Engineer   Svetlana Savitskaya
Second and last spaceflight
Research Cosmonaut   Igor Volk
Only spaceflight

Backup crewEdit

Position Crew
Commander   Vladimir Vasyutin
Flight Engineer   Yekaterina Ivanova
Research Cosmonaut   Viktor Savinykh

Mission parametersEdit

  • Mass: 7020 kg
  • Perigee: 192 km
  • Apogee: 218 km
  • Inclination: 51.6°
  • Period: 88.6 minutes

Mission highlightsEdit

Soyuz T-12 was the 7th expedition to Salyut 7.

Volk was a glimpse of things which might have been: he was a Buran programme program pilot being flown in space to prove he would be able to pilot Buran back to Earth after an extended stay in space.

The crew of Soyuz T-12 (callsign Pamir), the second Visiting Expedition to visit the Mayaks, included veteran cosmonaut Vladimir Dzhanibekov, Buran shuttle program cosmonaut Igor Volk, and Svetlana Savitskaya. On July 25 Dzhanibekov and Savitskaya performed a 3 hr, 30 min EVA (Savitskaya became the first woman ever to perform EVA), during which they tested the URI multipurpose tool. They cut, welded, soldered, and coated metal samples. During the Pamirs’ stay, the six cosmonauts aboard Salyut 7 also conducted Rezonans tests and collected station air samples.


  1. ^ "Salyut 7 EP-4". Encyclopedia Astronautica. Archived from the original on 11 November 2011. Retrieved 15 November 2010.
  2. ^ a b c d e f Hendrickx, Bart; Bert Vis (2007-10-04). Energiya-Buran : The Soviet Space Shuttle. Praxis. pp. 526. ISBN 978-0-387-69848-9.