Salyut

The Salyut program was a space program by the Soviet Union to create space stations. There were seven, single-module stations with the name Salyut that made it to orbit. An additional two stations failed during launch and were not given names starting with Salyut.

Three of these space stations were part of the Almaz series of millitary space stations, instead of the civilian Salyut program. They used the name Salyut in order to try to hide their military use.

Part of the design of the Salyut stations was later used as the basis for the core module of Mir. It was also used in the Zvezda servide module of the International Space Station. Part of the design of the Almaz stations was later used as the basis for the Kvant-1 module in Mir and the Zarya module of the International Space Station.

Name	Also known as	Launched	Burned up in the atmosphere	Days in orbit	Days with people on board	Crew and visitors (total)	Visiting crewed spacecraft	Visiting uncrewed spacecraft	Mass kg
Salyut 1	DOS-1	19 April 1971	11 October 1971	175	23	3	2	-	18,500
DOS-2 (failure)		29 July 1972	29 July 1972	-	-	-	-	-	18,500
Salyut 2	OPS-1 (Almaz military station)	4 April 1973	28 May 1973	54	-	-	-	-	18,500
Kosmos 557 (failure)	DOS-3	11 May 1973	22 May 1973	11	-	-	-	-	19,400
Salyut 3	OPS-2 (Almaz military station)	25 June 1974	24 January 1975	213	15	2	2	-	18,500
Salyut 4	DOS-4	26 December 1974	3 February 1977	770	92	4	2	1	18,500
Salyut 5	OPS-3 (Almaz military station)	22 June 1976	8 August 1977	412	67	4	3	-	19,000
Salyut 6	DOS-5	29 September 1977	29 July 1982	1764	683	33	18	15	19,824
Salyut 7	DOS-6	19 April 1982	7 February 1991	3216	816	26	11	15	18,900