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{{short description|Soviet space station (1977–1982)}}
{{Good article}}
{{Use British English|date=January 2014}}
{{Use dmy dates|date=June 2020}}
{{Infobox space station

 | station               = Salyut 6
 | station_image         = Salyut 6.jpg
 | station_image_size    =
 | station_image_caption = Salyut 6 with docked [[Soyuz 7K-T|Soyuz]] and [[Progress 7K-TG|Progress]].

 | insignia              = Salyut program insignia.svg
 | insignia_caption      = Salyut programme logo

 | COSPAR_ID             = 1977-097A
 | SATCAT                = 10382

 | sign                  = Salyut 6
 | crew                  = 3
 | launch                = 29 September 1977, 06:50:00 [[UTC]]
 | launch_pad            = [[Baikonur Cosmodrome|Baikonur]], [[Baikonur Cosmodrome Site 81|Site 81/24]]

 | reentry               = 29 July 1982
 | mass                  = {{cvt|19824|kg|lb}}
 | length                = {{cvt|15.8|m|ft}}
 | diameter              = {{cvt|4.15|m|ft}}
 | volume                = {{cvt|90|m3}}

 | perigee               = {{cvt|219|km|mi}}
 | apogee                = {{cvt|275|km|mi}}
 | inclination           = 51.66°
 | period                = 89.1 minutes

 | orbits_day            = 16.16
 | in_orbit              = 1,764
 | occupied              = 683
 | orbits                = 28,024
 | distance              = ~{{cvt|1,136,861,930|km}}
 | as_of                 = deorbit on 29 July 1982

 | stats_ref             = {{r|SSSM|nssdc1}}

 | configuration_image   = Salyut_6_drawing.svg
 | configuration_size    = 190px
 | configuration_caption = Basic orbital configuration of Salyut 6
}}

'''Salyut 6''' ({{Langx|ru|Салют 6|lit=Salute 6}}) was a [[Soviet Union|Soviet]] [[orbital station|orbital space station]], the eighth station of the [[Salyut programme]], and alternatively known '''DOS-5''' as it was the fifth of the Durable Orbital Station series of civilian space stations. It was launched on 29 September 1977 by a [[Proton-K]] rocket. Salyut 6 was the first space station to receive large numbers of crewed and uncrewed spacecraft for human habitation, crew transfer, international participation and resupply, establishing precedents for station life and operations which were enhanced on [[Mir]] and the [[International Space Station]].

Salyut 6 was the first "second generation" space station, representing a major breakthrough in capabilities and operational success. In addition to a new propulsion system and its primary scientific instrument—the BST-1M multispectral telescope—the station had two docking ports, allowing two craft to visit simultaneously.  This feature made it possible for humans to remain aboard for several months.<ref name=Chiara/>  Six long-term resident crews were supported by ten short-term visiting crews who typically arrived in newer Soyuz craft and departed in older craft, leaving the newer craft available to the resident crew as a return vehicle, thereby extending the resident crew's stay past the [[design life]] of the Soyuz. Short-term visiting crews routinely included international cosmonauts from [[Warsaw Pact]] countries participating in the Soviet Union's [[Intercosmos]] programme. These cosmonauts were the first spacefarers from countries other than the Soviet Union or the United States. Salyut 6 was visited and resupplied by twelve uncrewed [[Progress spacecraft]] including [[Progress 1]], the first instance of the series.  Additionally, Salyut 6 was visited by the first instances of the new [[Soyuz-T]] spacecraft.

The success of Salyut 6 contrasted with the programme's earlier failures and limited successes.  The early history of the programme was plagued by the fatalities of [[Soyuz 11]] and three launched stations which quickly failed.  Earlier successful stations received few crews, limited to several weeks' habitation by the design life of their Soyuz craft and the presence of a single docking port per station; unsuccessful docking was also common.  Salyut 6 on the other hand routinely received successful dockings of crewed and uncrewed craft, although the first visiting craft [[Soyuz 25]] and later [[Soyuz 33]] failed to dock with the station.

From 1977 to 1981, the station was occupied by human crews during six separate, discontinuous intervals, each coterminous with the presence of a resident crew who were first-in, last-out while support crew visited.  Between each of these intervals Salyut 6 was vacant, although it was visited by [[Soyuz T-1]] and [[Kosmos 1267]] during its periods of vacancy. Following the launch of successor [[Salyut 7]], Salyut 6 was de-orbited on 29 July 1982, almost five years after its own launch.{{r|SSSM|baker}}

== Description ==
Salyut 6, launched on a [[Proton-K]] rocket on 29 September 1977,{{r|ea-salyut6}} marked the switch from engineering development stations to routine operations, and united the most effective elements from each of the previous stations. Its navigation system, made up of the Delta semi-automatic computer to depict the station's orbit and the Kaskad system to control its orientation, was based on that used on [[Salyut 4]], as was its power system, which consisted of a trio of steerable [[Photovoltaic module|solar panels]], together producing a peak of 4 [[kilowatts]] of power over 51 m<sup>2</sup>. The station's thermal regulation systems, which made use of a sophisticated arrangement of insulation and radiators, was also derived from that used on Salyut 4. In addition, Salyut 6 made use of environmental systems first used on [[Salyut 3]], and controlled its orientation using [[Control moment gyroscope|gyrodynes]] first tested on that station.{{r|SSSM}}

[[File:F-S6P.png|thumb|left|Salyut 6 with [[Progress spacecraft|Progress (P)]] and [[Soyuz spacecraft|Soyuz (F)]] spacecraft]]

The most important feature on Salyut 6 was the addition of a second docking port on the aft end of the station, which allowed two spacecraft to be docked at once.  This enabled resident crews to receive shorter, visiting expeditions whilst they remained on board, and for crew transfers to take place between the Soyuz craft.  Typically, visiting crews returned to Earth in the older Soyuz which the resident crew had flown to the station, leaving a newer craft available to the resident crew as a return vehicle.  This procedure allowed resident crews to remain aboard Salyut 6 past the three-month lifespan of the first-generation Soyuz 7K vehicle.  Salyut 6 was not occupied continuously, or "handed off" from one expedition to another.  Rather, the six resident crews took up occupancy in the station and were visited by various Soyuz support missions and Progress supply tugs, and upon each resident crew's departure, Salyut 6 was vacant.  The first long-duration crew to visit the station broke a long-standing endurance record set on board the American [[Skylab]] station, staying 96 days in orbit; the longest expedition lasted 185 days.  Most of the visiting expeditions were flown as part of the [[Intercosmos]] programme, with non-Soviet cosmonauts visiting the station. [[Vladimír Remek]] of [[Czechoslovakia]], the first [[astronaut|space traveller]] not from the US or USSR, visited Salyut 6 in 1978, and the station hosted cosmonauts from Hungary, Poland, Romania, Cuba, Mongolia, Vietnam, and [[East Germany]].{{r|SSSM}} [[Georgi Ivanov (cosmonaut)|Georgi Ivanov]], a Bulgarian, was a member of the crew of Soyuz 33, which failed to dock with the station.  The failure implicated the resident crew's [[Soyuz 32]], with the result that a modified [[Soyuz 34]] was launched to them without a crew, as a return vehicle.{{r|Yenne}}

The rearward of the two ports was fitted with plumbing to allow the station to be refueled by uncrewed [[Progress spacecraft]]. These freighters, which brought supplies and extra equipment to keep the station replenished, helped ensure that the crew were always able to carry out useful scientific work aboard the station. In all, twelve Progress flights delivered over 20 [[tonnes]] of equipment, supplies and fuel.{{r|SSSM}}

The addition of the extra docking port caused the adoption of the [[Almaz]]-derived twin-chamber propulsion system first used on Salyut 3 and [[Salyut 5|5]], with the two engine nozzles – each producing 2.9 [[kilonewtons]] of thrust – mounted peripherally on either side of the aft port. Salyut 6 introduced a unified propulsion system, with both the engines and the station's control thrusters running on [[Dinitrogen tetroxide|{{chem2|N2O4}}]] / [[unsymmetrical dimethylhydrazine|UDMH]],{{r|Chiara}} drawn from a common set of pressurized tanks, allowing the refueling capabilities of the visiting Progress tankers to be exploited to the maximal effect. The entire engine and fuel storage assembly was contained within an unpressurized bay at the rear of the station, which had the same diameter as the main pressurized compartment. However, the replacement of the [[Soyuz (spacecraft)|Soyuz]] engine used on previous stations with the bay meant that the station kept an overall length similar to its predecessors.{{r|SSSM}} The main engines could not be fired if the rear docking port was in use, hence any orbital maneuvers during this time had to be performed by the visiting spacecraft.

Salyut 6's propulsion system experienced a serious malfunction during the second crew residency in 1978 and was not usable again for the remainder of the station's lifespan. As a consequence, it was limited to firing its attitude-control thrusters, and visiting spacecraft had to perform orbital adjustments. After each crew residency ended, it was necessary for Progress and TKS spacecraft to boost the station into a high orbit, so it would not decay until the next residency began.

To enable [[Extra-vehicular activity|spacewalks]], Salyut 6 was equipped with an inward-opening EVA hatch on the side of the forward transfer compartment, which could be used as an airlock in a similar way to the system used on Salyut 4. This compartment contained two new semi-rigid spacesuits, which allowed much greater flexibility than earlier suits and could be donned within five minutes in an emergency. The station offered considerable improvements in living conditions over previous outposts, with machinery being soundproofed, the crews being provided with designated "cots" for sleeping and the equipping of the station with a shower and extensive gymnasium.{{r|SSSM}}

=== Instruments ===
The primary instrument carried aboard the station was the BST-1M multispectral telescope, which could carry out astronomical observations in the infrared, ultraviolet and submillimeter spectra using a 1.5&nbsp;metre-diameter mirror, which was operated in cryogenic conditions at around {{cvt|−269|°C|K|0}}. The telescope could be operated only when Salyut 6 was on the night side of the Earth and had its cover closed for the rest of the time.{{r|SSSM}}

The second major instrument was the [[MKF-6 (multispectral camera)|MKF-6M]] multispectral camera, which carried out Earth-resources observations. An improved form of a camera first tested on [[Soyuz 22]], the camera captured an area of {{cvt|165|xx|220|km|mi}} with each image, down to a resolution of {{cvt|20|m|ft}}. Each image was captured simultaneously in six bands in 1200-frame cassettes, which required regular replacement due to the fogging effects of radiation. Salyut 6 also featured a KATE-140 stereoscopic [[topographic map]]ping camera with a [[focal length]] of {{cvt|140|mm|in}}, which captured images of {{cvt|450|xx|450|km|mi}} with a resolution of {{cvt|50|m|ft}} in the visible and infrared spectra, which could be operated either remotely or by the resident crews. The photographic capabilities of the station were, therefore, extensive, and the Soviet Ministry of Agriculture had planted a number of specifically selected crops at test sites to examine the capabilities of the cameras.{{r|SSSM}}

To further expand its scientific capabilities, Salyut 6 was equipped with 20 portholes for observations, two scientific airlocks to expose equipment to space or eject rubbish, and various pieces of apparatus to carry out biological experiments. Later on during the flight, a Progress spacecraft delivered an external telescope, the {{ill|KRT-10|ru|КРТ-10}} radio observatory, which incorporated a [[directional antenna]] and five [[radiometer]]s. The antenna was deployed on the rear docking assembly, with the controller remaining inside the station, and was used for both astronomical and meteorological observations.{{r|SSSM}}

== Support craft ==
[[Image:Progress drawing.svg|thumb|right|The original [[Progress (spacecraft)|Progress]] variant, which was first used to resupply Salyut 6 in 1978.]]

Salyut 6 was primarily supported by the crewed [[Soyuz spacecraft]], which carried out crew rotations and would also have been used in the event of an emergency evacuation. The ferries docked automatically to the station, making use of the new [[Igla docking system|Igla]] automatic docking system, and were used by departing crews to return to Earth at the end of their flight.{{r|Soyuz}}

The station was the first to be able to be resupplied by the newly developed uncrewed [[Progress spacecraft|Progress]] freighters, although they could only dock at the rear port, as the front port lacked the plumbing used to refuel the propulsion system. The freighters docked automatically to the station via the Igla, and were then opened and emptied by the cosmonauts on board, whilst transfer of fuel to the station took place automatically under supervision from the ground.{{r|SSSM|Soyuz}}

In addition to the Soyuz and Progress spacecraft, after the final crew had left, Salyut 6 was visited by an experimental transport logistics spacecraft called [[Kosmos 1267]] in 1982. The transport logistics spacecraft, known as the [[TKS (spacecraft)|TKS]], was originally designed for the [[Almaz]] programme, and proved that large modules could dock automatically with space stations, a major step toward the construction of multimodular stations such as [[Mir]] and the [[International Space Station]].{{r|mhh|ea-tks}}

== Resident crews ==
The station received 16 cosmonaut crews, including six long-duration crews, with the longest expedition lasting 185 days. Resident crew missions were identified with an ''EO'' prefix, whilst short-duration missions were identified with ''EP''.

# On 10 December 1977 the first resident crew, [[Yuri Romanenko]] and [[Georgy Grechko]], arrived on [[Soyuz 26]] and remained aboard Salyut 6 for 96 days.
# On 15 June 1978, [[Vladimir Kovalyonok]] and [[Aleksandr Ivanchenkov]] ([[Soyuz 29]]) arrived and remained on board for 140 days.
# [[Vladimir Lyakhov]] and [[Valery Ryumin]] ([[Soyuz 32]]) arrived on 25 February 1979 and stayed 175 days.
# On 9 April 1980 [[Leonid Popov]] and [[Valery Ryumin]] ([[Soyuz 35]]) arrived for the longest stay on Salyut 6, 185 days. While aboard, on 19 July 1980, they sent their greetings to the Olympians and wished them happy starts in the [[Live television|live communication]] between the station and the [[Luzhniki Stadium|Central Lenin Stadium]], where the opening ceremony of the [[1980 Summer Olympics]] was held. They appeared on the stadium's [[scoreboard]] and their voices were translated via [[loud speaker]]s.
# A repair mission, consisting of [[Leonid Kizim]], [[Oleg Grigoryevich Makarov|Oleg Makarov]], and [[Gennady Strekalov]] ([[Soyuz T-3]]) worked on the space station for 12 days starting on 27 November 1980.
# On 12 March 1981 the last resident crew, [[Vladimir Kovalyonok]] and [[Viktor Savinykh]], arrived and stayed for 75 days.

== Station operations ==
=== Docking operations ===
On four occasions, a visiting Soyuz craft was transferred from the station's aft port to its forward port.  This was done to accommodate upcoming Progress shuttles, which could only refuel the station using connections available at the aft port.  Typically, the resident crew would first dock at the forward port, leaving the aft port available for Progress craft and visiting Soyuz support crews.  When a support crew docked at the aft port and left in the older, forward Soyuz, the resident crew would move the new vehicle forward by boarding it, undocking, and translating some 100–200 meters away from Salyut 6.  Then, ground control would command the station itself to rotate 180 degrees, and the Soyuz would close and re-dock at the forward port.  Soyuz 31, 34, 36 and 37 performed the operation, piloted by resident crews after the newer vehicles had been left available by departed support crews.{{r|mhh}}
{{sticky header}}
{| class="wikitable sticky-header"
|- bgcolor="#efefef" valign="top"
! style="text-align:left" width="100"|Spacecraft
! style="text-align:left" width="150"|Docking day
! style="text-align:left" width="100"|Docking time
! style="text-align:left" width="50"|Port
! style="text-align:left" width="150"|Undocking day
! style="text-align:left" width="100"|Undocking time
! style="text-align:left" width="70"|Duration {{small|(days)}}
|-
| [[Soyuz 25]]
| 10 October 1977
| 07:09
| front
| 11 October 1977
| ~08:00
| 1.03
|-
| [[Soyuz 26]]
| 11 December 1977
| 06:02
| rear
| 16 January 1978
| 14:22
| 36.35
|-
| [[Soyuz 27]]
| 11 January 1978
| 17:06
| front
| 16 March 1978
| 11:00
| 63.75
|-
| [[Progress 1]]
| 22 January 1978
| 13:12
| rear
| 7 February 1978
| 08:55
| 15.82
|-
| [[Soyuz 28]]
| 3 March 1978
| 20:10
| rear
| 10 March 1978
| 13:25
| 6.72
|-
| [[Soyuz 29]]
| 17 June 1978
| 00:58
| front
| 3 September 1978
| 11:23
| 78.43
|-
| [[Soyuz 30]]
| 29 June 1978
| 20:08
| rear
| 5 July 1978
| 13:15
| 6.71
|-
| [[Progress 2]]
| 9 July 1978
| 15:59
| rear
| 2 August 1978
| 07:57
| 23.66
|-
| [[Progress 3]]
| 10 August 1978
| 03:00
| rear
| 21 August 1978
| –
| ~11
|-
| [[Soyuz 31]]
| 27 August 1978
| 19:37
| rear
| 7 September 1978
| 13:53
| 10.76
|-
| Soyuz 31
| 7 September 1978
| 14:21
| front
| 2 November 1978
| 10:46
| 55.85
|-
| [[Progress 4]]
| 6 October 1978
| 04:00
| rear
| 24 October 1978
| 16:07
| 18.50
|-
| [[Soyuz 32]]
| 26 February 1979
| 08:30
| front
| 13 June 1979
| 12:51
| 107.18
|-
| [[Progress 5]]
| 14 March 1979
| 10:20
| rear
| 3 April 1979
| 19:10
| 20.37
|-
| Progress 6
| 15 May 1979
| 09:19
| rear
| 8 June 1979
| 11:00
| 24.07
|-
| [[Soyuz 34]]
| 8 June 1979
| 23:02
| rear
| 14 June 1979
| 19:18
| 5.84
|-
| Soyuz 34
| 14 June 1979
| ~19:50
| front
| 19 August 1979
| 12:08
| 65.86
|-
| Progress 7
| 30 June 1979
| 14:18
| rear
| 18 July 1979
| 06:50
| 17.69
|-
| [[Soyuz T-1]]
| 19 December 1979
| 17:05
| front
| 24 March 1980
| 00:04
| 94.29
|-
| [[Progress 8]]
| 29 March 1980
| 23:01
| rear
| 25 April 1980
| 11:04
| 26.50
|-
| [[Soyuz 35]]
| 10 April 1980
| 18:16
| front
| 3 June 1980
| 14:47
| 53.85
|-
| Progress 9
| 29 April 1980
| 11:09
| rear
| 20 May 1980
| 21:51
| 21.45
|-
| [[Soyuz 36]]
| 27 May 1980
| 22:56
| rear
| 4 June 1980
| 18:08
| 7.86
|-
| Soyuz 36
| 4 June 1980
| 19:38
| front
| 31 July 1980
| 14:55
| 56.86
|-
| [[Soyuz T-2]]
| 6 June 1980
| 18:58
| rear
| 9 June 1980
| 12:24
| 2.73
|-
| Progress 10
| 1 July 1980
| 08:53
| rear
| 18 July 1980
| 01:21
| 16.69
|-
| [[Soyuz 37]]
| 24 July 1980
| 23:02
| rear
| 1 August 1980
| 19:43
| 7.86
|-
| Soyuz 37
| 1 August 1980
| ~20:10
| front
| 11 October 1980
| 09:30
| 70.56
|-
| [[Soyuz 38]]
| 19 September 1980
| 20:49
| rear
| 26 September 1980
| 12:35
| 6.62
|-
| Progress 11
| 30 September 1980
| 20:03
| rear
| 9 December 1980
| 13:23
| 69.72
|-
| [[Soyuz T-3]]
| 28 November 1980
| 18:54
| front
| 10 December 1980
| 09:10
| 11.59
|-
| Progress 12
| 26 January 1981
| 18:56
| rear
| 19 March 1981
| 21:14
| 52.09
|-
| [[Soyuz T-4]]
| 13 March 1981
| 23:33
| front
| 26 May 1981
| –
| ~74
|-
| [[Soyuz 39]]
| 23 March 1981
| 19:28
| rear
| 30 March 1981
| 11:22
|
|-
| [[Soyuz 40]]
| 15 May 1981
| 21:50
| rear
| 22 May 1981
| 13:37
| 6.66
|-
| [[Kosmos 1267]]
| 19 June 1981
| 10:52
| front
| permanently docked
| –
| –
|}

{{small|''Dates and times are 24-hour [[Moscow Time]]. Sources:ṏ{{r|SSSM|mhh}}''}}

=== Station crews ===
{{sticky header}}
{| class="wikitable sticky-header"
|- bgcolor="#efefef" valign="top"
! style="text-align:left" width="100"|Expedition
! style="text-align:left" width="350"|Crew
! style="text-align:left" width="175"|Launch date
! style="text-align:left" width="125"|Flight up
! style="text-align:left" width="175"|Landing date
! style="text-align:left" width="125"|Flight down
! style="text-align:left" width="50"|Duration <small>(days)</small>
|-
| ''''' [[Salyut 6 EO-1|Salyut 6 -<br/>EO-1]] '''''
| {{flagicon|URS}} [[Yuri Romanenko]],<br/>{{flagicon|URS}} [[Georgy Grechko]]
| 10 December 1977<br/>01:18:40
| [[Soyuz 26]]
| 16 March 1978<br/>11:18:47
| [[Soyuz 27]]
| align="right" |96.42
|-
| ''''' [[Salyut 6 EP-1|Salyut 6 -<br/>EP-1]] '''''
| {{flagicon|URS}} [[Vladimir Dzhanibekov]],<br/>{{flagicon|URS}} [[Oleg Grigoryevich Makarov|Oleg Makarov]]
| 10 January 1978<br/>12:26:00
| [[Soyuz 27]]
| 16 January 1978<br/>11:24:58
| [[Soyuz 26]]
| align="right" |5.96
|-
| ''''' Salyut 6 -<br/>EP-2 '''''
| {{flagicon|URS}} [[Aleksei Gubarev]],<br/>{{flagicon|CSK}} [[Vladimir Remek]]
| 2 March 1978<br/>15:28:00
| [[Soyuz 28]]
| 10 March 1978<br/>13:44:00
| [[Soyuz 28]]
| align="right" |7.93
|-
| ''''' Salyut 6 -<br/>EO-2 '''''
| {{flagicon|URS}} [[Vladimir Kovalyonok]],<br/>{{flagicon|URS}} [[Aleksandr Ivanchenkov]]
| 15 June 1978<br/>20:16:45
| [[Soyuz 29]]
| 2 November 1978<br/>11:04:17
| [[Soyuz 31]]
| align="right" |139.62
|-
| ''''' Salyut 6 -<br/>EP-3 '''''
| {{flagicon|URS}} [[Pyotr Klimuk]]<br/>{{flagicon|POL}} [[Mirosław Hermaszewski]]
| 27 June 1978<br/>15:27:21
| [[Soyuz 30]]
| 5 July 1978<br/>13:30:20
| [[Soyuz 30]]
| align="right" |7.92
|-
| ''''' Salyut 6 -<br/>EP-4 '''''
| {{flagicon|URS}} [[Valery Bykovsky]]<br/>{{flagicon|GDR}} [[Sigmund Jähn]]
| 26 August 1978<br/>14:51:30
| [[Soyuz 31]]
| 3 September 1978<br/>11:40:34
| [[Soyuz 29]]
| align="right" |7.87
|-
| ''''' Salyut 6 -<br/>EO-3 '''''
| {{flagicon|URS}} [[Vladimir Lyakhov]],<br/>{{flagicon|URS}} [[Valery Ryumin]]
| 25 February 1979<br/>11:53:49
| [[Soyuz 32]]
| 19 August 1979<br/>12:29:26
| [[Soyuz 34]]
| align="right" |175.02
|-
| ''''' Salyut 6 -<br/>EO-4 '''''
| {{flagicon|URS}} [[Leonid Popov]],<br/>{{flagicon|URS}} [[Valery Ryumin]]
| 9 April 1980<br/>13:38:22
| [[Soyuz 35]]
| 11 October 1980<br/>09:49:57
| [[Soyuz 37]]
| align="right" |184.84
|-
| ''''' Salyut 6 -<br/>EP-5 '''''
| {{flagicon|URS}} [[Valery Kubasov]]<br/>{{flagicon|HUN}} [[Bertalan Farkas]]
| 26 May 1980<br/>18:20:39
| [[Soyuz 36]]
| 3 June 1980<br/>15:06:23
| [[Soyuz 35]]
| align="right" |7.87
|-
| ''''' Salyut 6 -<br/>EP-6 '''''
| {{flagicon|URS}} [[Yuri Malyshev (cosmonaut)|Yury Malyshev]]<br/>{{flagicon|URS}} [[Vladimir Aksyonov]]
| 5 June 1980<br/>14:19:30
| [[Soyuz T-2]]
| 9 June 1980<br/>12:39:00
| [[Soyuz T-2]]
| align="right" |3.93
|-
| ''''' Salyut 6 -<br/>EP-7 '''''
| {{flagicon|URS}} [[Viktor Gorbatko]],<br/>{{flagicon|VNM}} [[Pham Tuan]]
| 23 July 1980<br/>18:33:03
| [[Soyuz 37]]
| 31 July 1980<br/>15:15:02
| [[Soyuz 36]]
| align="right" |7.86
|-
| ''''' Salyut 6 -<br/>EP-8 '''''
| {{flagicon|URS}} [[Yuri Romanenko]],<br/>{{flagicon|CUB}} [[Arnaldo Tamayo Méndez]]
| 18 September 1980<br/>19:11:03
| [[Soyuz 38]]
| 26 September 1980<br/>15:54:27
| [[Soyuz 38]]
| align="right" |7.86
|-
| ''''' Salyut 6 -<br/>EO-5 '''''
| {{flagicon|URS}} [[Leonid Kizim]],<br/>{{flagicon|URS}} [[Oleg Grigoryevich Makarov|Oleg Makarov]]<br/>{{flagicon|URS}} [[Gennady Strekalov]]
| 27 November 1980<br/>14:18:28
| [[Soyuz T-3]]
| 10 December 1980<br/>09:26:10
| [[Soyuz T-3]]
| align="right" |12.80
|-
| ''''' Salyut 6 -<br/>EO-6 '''''
| {{flagicon|URS}} [[Vladimir Kovalyonok]],<br/>{{flagicon|URS}} [[Viktor Savinykh]]
| 12 March 1981<br/>19:00:11
| [[Soyuz T-4]]
| 26 May 1981<br/>12:37:34
| [[Soyuz T-4]]
| align="right" |74.73
|-
| ''''' Salyut 6 -<br/>EP-9 '''''
| {{flagicon|URS}} [[Vladimir Dzhanibekov]],<br/>{{flagicon|MNG}} [[Jügderdemidiin Gürragchaa]]
| 22 March 1981<br/>14:58:55
| [[Soyuz 39]]
| 30 March 1981<br/>11:40:58
| [[Soyuz 39]]
| align="right" |7.86
|-
| ''''' Salyut 6 -<br/>EP-10 '''''
| {{flagicon|URS}} [[Leonid Popov]],<br/>{{flagicon|ROM}} [[Dumitru Prunariu]]
| 14 May 1981<br/>17:16:38
| [[Soyuz 40]]
| 22 May 1981<br/>13:58:30
| [[Soyuz 40]]
| align="right" |7.86
|}

{{small|''Dates and times are 24-hour [[Coordinated Universal Time]].''}}

=== Spacewalks ===
{| class="wikitable"
! style="text-align:left" width="120"|'''EVA'''
! style="text-align:left" width="180"|'''Spacewalkers'''
! style="text-align:left" width="100"|'''Date'''
! style="text-align:left" width="50"|'''EVA Start'''
! style="text-align:left" width="50"|'''EVA End'''
! style="text-align:left" width="50"|'''Duration<br/><small>(hours)</small>'''
! style="text-align:left" width="350"|'''Comments'''
|-
| ''''' Salyut 6 – PE-1 '''''
| [[Yuri Romanenko]] and [[Georgy Grechko]]
| 19 December 1977
| 21:36
| 23:04
| 1:28
| Test of [[Orlan space suit|Orlan-D]] spacesuit, inspection of docking apparatus and Medusa cassette deployment.
|-
| ''''' Salyut 6 – PE-2 '''''
| [[Vladimir Kovalyonok]] and [[Aleksandr Ivanchenkov]]
| 29 July 1978
| 04:00
| 06:20
| 2:05
| Retrieval of Medusa cassette and passive micrometeoroid detector, deployment of radiation detector & new experimental cassettes.
|-
| ''''' Salyut 6 – PE-3 '''''
| [[Valery Ryumin]] and [[Vladimir Lyakhov]]
| 15 August 1979
| 14:16
| 15:39
| 1:23
| Removal of KRT-10 radio telescope dish, retrieval of experiment cassettes.
|}
{{small|''Dates and times are 24-hour [[Coordinated Universal Time]]. Source:{{r|SSSM}}''}}

== See also ==
{{Portal|Soviet Union|Spaceflight}}
* [[Timeline of longest spaceflights]]

== References ==
{{Reflist|refs=

<ref name="baker">{{cite book
| author1= P. Baker
| title= The Story of Manned Space Stations
| url= https://books.google.com/books?id=DdgIMOmcG0wC
| publisher= Springer-Praxis
| location= New York
| year= 2007
| isbn= 978-0-387-30775-6 }}
</ref>

<ref name="Chiara">{{cite book
| author1= G. De Chiara
| author2= M. H. Gorn
| title= Spacecraft: 100 Iconic Rockets, Shuttles, and Satellites that put us in Space
| url= https://books.google.com/books?id=tDdnDwAAQBAJ
| publisher= Quarto/Voyageur 
| location= Minneapolis
| year= 2018
| pages= 132–135
| isbn= 978-0-760-35418-6 }}
</ref>

<ref name="ea-salyut6">{{cite encyclopedia
| author1= M. Wade
| title= Salyut 6 
| url= http://www.astronautix.com/s/salyut6.html
| encyclopedia= Encyclopedia Astronautica
| access-date= 2007-07-05 }}
</ref>

<ref name="ea-tks">{{cite encyclopedia
| author1= M. Wade
| title= TKS
| url= http://www.astronautix.com/t/tks.html
| encyclopedia= Encyclopedia Astronautica
| access-date= 2007-06-28 }}
</ref>

<ref name="mhh">{{Cite book
| author1= D. S. F. Portree
| url= https://www.hq.nasa.gov/pao/History/SP-4225/documentation/mhh/mirheritage.pdf
| title= Mir Hardware Heritage
| year= 1995
| publisher= [[NASA]]
| id= NASA-SP-4225
| pages= 76–89
| archive-url= https://web.archive.org/web/20230326210404/https://www.hq.nasa.gov/pao/History/SP-4225/documentation/mhh/mirheritage.pdf
| archive-date= 2023-03-26
| url-status= live }}
</ref>

<ref name="nssdc1">{{cite web
| title= Salyut 6
| url= https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1977-097A
| website= nssdc.gsfc.nasa.gov
| publisher= [[NASA]]
| date= 2008-04-02
| access-date= 2008-06-29 }}
</ref>

<ref name="Soyuz">{{cite book
| author1= R. Hall
| author2= D. Shayler
| title= Soyuz: A Universal Spacecraft
| publisher= Springer-Praxis
| year= 2003
| location= London
| isbn= 978-1-85233-657-8 }}
</ref>

<ref name="SSSM">{{cite book
| author1= D. Harland
| title= The Story of Space Station Mir
| publisher= Springer-Praxis
| year= 2005
| location= Glasgow, UK
| url= https://books.google.com/books?id=ygrHNAEACAAJ
| isbn= 978-0-387-23011-5 }}
</ref>

<ref name="Yenne">{{cite book
| author1= B. Yenne
| title= The Pictorial History of World Spaceflight
| publisher= Exeter
| url= https://books.google.com/books?id=e0WGhabCKswC
| year= 1988
| isbn= 978-0-791-70188-1
| page= 124 }}
</ref>

}}

{{clear}}
{{Salyut programme}}
{{Space stations}}
{{Orbital launches in 1977}}
{{Authority control}}

[[Category:Salyut programme]]
[[Category:1977 in the Soviet Union]]
[[Category:1977 in spaceflight]]
[[Category:Spacecraft launched in 1977]]
[[Category:Spacecraft which reentered in 1982]]