Soyuz 7K-TM

Not to be confused with Soyuz-TM.

The 1975 Apollo–Soyuz Test Project version of the Soyuz spacecraft (Soyuz 7K-TM) served as a technological bridge to the third generation Soyuz-T (T - транспортный, Transportnyi meaning transport) spacecraft (1976–1986).

Soyuz 7K-TM

Soyuz 19, a Soyuz 7K-TM spacecraft, during the Apollo–Soyuz Test Project (ASTP).
Manufacturer	OKB-1
Country of origin	Soviet Union
Operator	Soviet space program
Applications	Crewed spacecraft
Specifications
Dimensions	Height 7.48 m (24.5 ft) Diameter 2.72 m (8 ft 11 in) Volume 9 m3 (320 cu ft)
Regime	Low Earth
Production
Status	Retired
Launched	5
Retired	5
Maiden launch	3 April 1974 Kosmos 638
Last launch	15 September 1976 Soyuz 22
Related spacecraft
Derived from	Soyuz 7K-T
Derivatives	Soyuz 7K-S Soyuz 7K-ST Soyuz 7K-MF6

The Soyuz ASTP spacecraft was designed for use during the Apollo Soyuz Test Project as Soyuz 19. It featured design changes to increase compatibility with the American craft. The Soyuz ASTP featured new solar panels for increased mission length, an APAS-75 docking mechanism instead of the standard male mechanism, and modifications to the environmental control system to lower the cabin pressure to 0.68 atmospheres (69 kPa) prior to docking with Apollo. The ASTP Soyuz backup craft flew as the Soyuz 22 mission, replacing the docking port with a camera.

Missions

Main article: List of Soviet human spaceflight missions

There are only five spaceflights of the Soyuz 7K-TM spacecraft, mostly in support for the joint US-Soviet Apollo–Soyuz mission. Excess hardware that flew on its final flight (Soyuz 22) were sometimes referred to its own unique configuration called the Soyuz 7K-MF6^[1][2]

Mission	Crew	Launch	Landing	Duration	Notes
Kosmos 638	None	3 Apr 1974	13 Apr 1974	10 days	First test flight of the APAS-75 docking system[3]
Kosmos 672	None	12 Aug 1974	18 Aug 1974	6 days	Second test flight of the APAS-75 docking system[3]
Soyuz 16	Anatoly Filipchenko Nikolai Rukavishnikov	2 Dec 1974	8 Dec 1974	6 days	Third and final dress rehearsal of testing the APAS-75 docking system for the subsequent ASTP mission[4]
Soyuz 19	Alexei Leonov Valery Kubasov	15 Jul 1975	21 Jul 1975	6 days	Part of the Apollo–Soyuz Test Project, the first international crewed spaceflight in history[5]
Soyuz 22	Valery Bykovsky Vladimir Aksyonov	15 Sept 1976	23 Sept 1976	8 days	Earth sciences and (possibly a) reconnaissance mission. Final crewed Soyuz spaceflight to not visit a space station[6]

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