Soyuz 18

Soyuz 18

Infobox Space mission
mission_name = Soyuz 18
sign = Кавказ (Kavkaz - "Caucasus")
crew_members = 2
launch = May 24, 1975
14:58:10 UTC
Gagarin's Start
landing = July 26, 1975
14:18:18 UTC
51° N, 68° E
duration = 62d/23:20:08
orbits = 993
next = Apollo-Soyuz Test Project
previous = Soyuz 18a |

Soyuz 18, of the Soyuz spacecraft series, brought cosmonauts Pyotr Klimuk and Vitali Sevastyanov to the Salyut 4 space station where they remained in orbit for 63 days.

The focus of the mission seems to have been research into long-term stays in space, with the crew performing various biomedical experiments and growing plants in orbit. They also made observations of the Earth and Sun.

The crew was on-board Salyut 4 during the Apollo-Soyuz Test Project, and contacted the participating astronauts and cosmonauts during that historic mission. ASTP resulted in a tie for the largest number of people in orbit at the same time, seven, matched by Soyuz 6, Soyuz 7 and Soyuz 8 in 1969.

The name "Soyuz 18" was also given to an earlier, unsuccessful Soyuz flight that is now often referred to as Soyuz 18-1 or Soyuz 18a.

Crew

Number in parentheses indicates number of spaceflights by each individual prior to and including this mission.
*Pyotr Klimuk (2) - Commander
*Vitali Sevastyanov (2) - Flight Engineer

Backup crew

*Vladimir Kovalyonok - Commander
*Yuri Ponomaryov - Flight Engineer

Mission parameters

*Mass: 6825 kg
*Perigee: 186 km
*Apogee: 230 km
*Inclination: 51.7°
*Period: 88.6 minutes


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