Soyuz 18

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Soyuz 18
Mission statistics
Mission name: Soyuz 18
Call sign: Кавказ (Kavkaz - "Caucasus")
Number of crew members: 2
Launch: May 24, 1975
14:58:10 UTC
Baikonur LC1
Landing: July 26, 1975
14:18:18 UTC
51° N, 68° E
Duration: 62 days, 23 h, 20 min, 08 s
Number of Orbits: 993

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.

[edit] Crew

[edit] Mission parameters

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


Preceded by
Soyuz 18a
Soyuz programme Succeeded by
Apollo-Soyuz