Soyuz T-8

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Soyuz T-8
COSPAR ID 1983-035A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 14014
Mission duration2 days, 17 minutes, 48 seconds
Orbits completed32
Spacecraft properties
Spacecraft type Soyuz-T
Manufacturer NPO Energia
Launch mass6,850 kilograms (15,100 lb)
Crew
Crew size3
Members Vladimir Titov
Gennady Strekalov
Aleksandr Serebrov
CallsignOkean (Ocean)
Start of mission
Launch dateApril 20, 1983, 13:10:54 (1983-04-20UTC13:10:54Z) UTC
Rocket Soyuz-U
Launch site Baikonur 1/5
End of mission
Landing dateApril 22, 1983, 13:28:42 (1983-04-22UTC13:28:43Z) UTC
Landing site60 kilometres (37 mi) NE of Arkalyk
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee altitude 200 kilometres (120 mi)
Apogee altitude 230 kilometres (140 mi)
Inclination 51.6 degrees
Period 88.6 minutes
Soyuz programme
(Crewed missions)
  Soyuz T-7
Soyuz T-9  

Soyuz T-8 was a crewed mission to the Salyut 7 Soviet space station in 1983. Shortly into the mission, the spacecraft failed to dock with the space station [1] due to an incident involving an antenna being torn off the craft by the protective launch shroud. After a fuel-consuming attempt made in darkness for an optical rendezvous with Salyut 7 resulted in an abort in order to avoid collision, it was decided to de-orbit T-8 two days into the mission in order to ensure that the spacecraft had a sufficient amount of propellant for the de-orbit maneuver. After de-orbiting, landing of the craft occurred normally.

Contents

Crew

Position Crew
Commander Flag of the Soviet Union.svg Vladimir Titov
First spaceflight
Flight Engineer Flag of the Soviet Union.svg Gennady Strekalov
Second spaceflight
Research Cosmonaut Flag of the Soviet Union.svg Aleksandr Serebrov
Second spaceflight

Backup crew

Position Crew
Commander Flag of the Soviet Union.svg Vladimir Lyakhov
Flight Engineer Flag of the Soviet Union.svg Aleksandr Aleksandrov
Research Cosmonaut Flag of the Soviet Union.svg Viktor Savinykh

Mission parameters

Mission highlights

Soyuz T-8 failed to dock with Salyut 7 due to problems with the capsule's automated docking system. It was the first failure to dock at a space station since Soyuz 33 in 1979.

Once in orbit, the Soyuz rendezvous radar antenna boom failed to deploy properly. [2] Several attitude control maneuvers at high rates failed to swing the boom out. The postflight inquiry later discovered that the antenna had been torn off when the Soyuz payload shroud separated. However, during the flight, the crew believed that the boom was still attached to the spacecraft's orbital module and that it had merely not locked into place. Accordingly, they shook the spacecraft using its attitude thrusters in an effort to rock it forward so it could lock.

With FCC permission, the crew attempted a rendezvous using only an optical sight and ground radar inputs for guidance. During the final approach, which was made in darkness, Titov believed that the closing speed was too great. He attempted a braking maneuver but felt that the two spacecraft were still closing too fast. He aborted the rendezvous to avoid a crash, and no further attempts were made. The abortive docking attempts consumed much propellant. To ensure that enough would remain to permit deorbit, the cosmonauts shut down the attitude control system and put Soyuz T-8 into a spin-stabilized mode of the type used by Soyuz Ferries in the early 1970s. The three men returned to Earth after a flight lasting just 2 days, 17 minutes, 48 seconds, and the landing proceeded normally. [3] [4]

References

  1. Yenne, Bill (1988). The Pictorial History of World Spaceflight. Exeter. p. 158. ISBN   0-7917-0188-3.
  2. Harvey, Brian (2001). Russia in Space: The Failed Frontier?. Springer. p. 19. ISBN   9781852332037.
  3. D. S. F. Portree (1995). "Mir Hardware Heritage" (PDF). NASA. pp. 49–50. Archived from the original (PDF) on 2003-07-09.
  4. "Soyuz T-8". Spacefacts.