This article is about a 1975 spaceflight. For the previous aborted attempt, see Soyuz 18a. For the mission identified by NASA as ISS Soyuz 18, see Soyuz TMA-14.
Soyuz 18
Mission type
Docking with Salyut 4
Operator
Soviet space program
COSPAR ID
1975-044A
SATCAT no.
07818
Mission duration
62 days 23 hours 20 minutes 8 seconds
Orbits completed
993
Spacecraft properties
Spacecraft
Soyuz 7K-T No.7
Spacecraft type
Soyuz 7K-T
Manufacturer
NPO Energia
Launch mass
6570 kg[1]
Landing mass
1200 kg
Crew
Crew size
2
Members
Pyotr Klimuk Vitaly Sevastyanov
Callsign
Кавказ (Kavkaz - "Caucasus")
Start of mission
Launch date
24 May 1975, 14:58:10 UTC
Rocket
Soyuz-U
Launch site
Baikonur, Site 1/5[2]
End of mission
Landing date
26 July 1975, 14:18:18 UTC
Landing site
56 km at the east of Arkalyk, Kazakhstan 51°N68°E / 51°N 68°E / 51; 68
Orbital parameters
Reference system
Geocentric orbit[3]
Regime
Low Earth orbit
Perigee altitude
193.0 km
Apogee altitude
247.0 km
Inclination
51.6°
Period
88.6 minutes
Docking with Salyut 4
Docking date
26 May 1975
Undocking date
26 July 1975
Time docked
61 days
Vimpel Diamond patch
Soyuz programme
← Soyuz 7K-T No.39
Soyuz 19 →
Soyuz 18 (Russian: Союз 18, Union 18) was a 1975 Soviet crewed mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitaly Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously (seven) was tied during the mission.
^Cite error: The named reference Display was invoked but never defined (see the help page).
^"Baikonur LC1". Encyclopedia Astronautica. Archived from the original on 15 April 2009. Retrieved 4 March 2009.
^Cite error: The named reference Trajectory was invoked but never defined (see the help page).
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