Soyuz 40
Soyuz 40 is launched from the Baikonur Cosmodrome on 14 May 1981.
COSPAR ID1981-042A Edit this at Wikidata
SATCAT no.12454
Mission duration7 days, 20 hours, 41 minutes, 52 seconds
Orbits completed124
Spacecraft properties
Spacecraft typeSoyuz 7K-T
ManufacturerNPO Energia
Launch mass6,800 kilograms (15,000 lb)
Crew size2
MembersLeonid Popov
Dumitru Prunariu
Start of mission
Launch date14 May 1981, 17:16:38 (1981-05-14UTC17:16:38Z) UTC
Launch siteBaikonur 1/5
End of mission
Landing date22 May 1981, 13:58:30 (1981-05-22UTC13:58:31Z) UTC
Landing site225 km SE of Dzhezkazgan
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude198.1 kilometres (123.1 mi)
Apogee altitude287 kilometres (178 mi)
Inclination51.6 degrees
Period89.6 minutes
Docking with Salyut 6

L-R: Popov and Prunariu
Soyuz programme
(Crewed missions)

The Soyuz 40 mission was a 1981 Soviet crewed spaceflight and the final flight of the Soyuz 7K-T spacecraft. It was a collaboration between the Soviet Union and Romania.[1]


Position Crew
Commander Soviet Union Leonid Popov
Second spaceflight
Research Cosmonaut Romania Dumitru Prunariu
Only spaceflight

Backup crew

Position Crew
Commander Soviet Union Yuri Romanenko
Research Cosmonaut Romania Dumitru Dediu

Mission parameters

Mission highlights

Soyuz 40 was the 16th expedition to Salyut 6 and carried the ninth international crew. It also ended the first phase of the Intercosmos program by carrying Romanian cosmonaut Dumitru Prunariu and Soviet cosmonaut Leonid Popov to the station. In all, nine Intercosmos missions were launched between 1978 and 1981.

Soyuz 40 was the last of the original Soyuz spacecraft (due to its replacement by the Soyuz-T) and the last Soyuz spacecraft to dock with Salyut 6. During the crew's stay, Prunariu studied the Earth's magnetic field. Earth observations had to be delayed until the last day of the flight, when Salyut 6 passed over Romania in daylight. During this time the crew also tested the station's orientation system.

See also


  1. ^ The mission report is available here: