Soyuz 40

Soyuz 40
Mission insignia
Mission statistics
Mission name	Soyuz 40
Crew size	2
Call sign	Dnieper
Launch date	May 14, 1981 17:16:38 UTC Gagarin's Start
Landing	May 22, 1981 13:58:30 UTC 225 km SE of Dzhezkazgan
Mission duration	7d/20:41:52
Number of orbits	124
Crew photo
Related missions
Previous mission Subsequent mission Soyuz 39 Soyuz T-5

The Soyuz 40 mission was a 1981 Soviet manned spaceflight and the last time the Soyuz 7K-T spacecraft was used. It was a collaboration between the Soviet Union and Romania.

Crew

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

Backup crew

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

Mission parameters

• Mass: 6800 kg
• Perigee: 198.1 km
• Apogee: 287 km
• Inclination: 51.6°
• Period: 89.06 minutes

Mission highlights

16th expedition to Salyut 6. 9th international crew. Carried intercosmos cosmonaut from Romania. Last Soyuz Ferry flight; ended the first phase of the Intercosmos program, which concentrated on placing citizens of Soviet bloc states into space. 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. It also ended the first phase of the Intercosmos program by carrying Romanian cosmonaut Dumitru Prunariu and Soviet cosmonaut Leonid Popov to the station. Prunariu studied Earth’s magnetic field. Earth observations had to be delayed until the last day of his flight, when Salyut 6 at last passed over Romania in daylight. During this time the crew also tested the station’s orientation system.