Soyuz TM-8
| COSPAR ID | 1989-071A | 
|---|---|
| SATCAT no. | 20218 | 
| Mission duration | 166 days, 6 hours, 58 minutes, 15 seconds | 
| Orbits completed | ~2,680 | 
| Spacecraft properties | |
| Spacecraft | Soyuz 7K-STM No. 58 | 
| Spacecraft type | Soyuz-TM | 
| Manufacturer | NPO Energia | 
| Launch mass | 7,150 kilograms (15,760 lb) | 
| Crew | |
| Crew size | 2 | 
| Members | Aleksandr Viktorenko Aleksandr Serebrov | 
| Callsign | Ви́тязь (Vityaz - Knight) | 
| Start of mission | |
| Launch date | 5 September 1989, 21:38:03 UTC | 
| Rocket | Soyuz-U2 | 
| End of mission | |
| Landing date | 19 February 1990, 04:36:18 UTC | 
| Landing site | 55 kilometres (34 mi) NE of Arkalyk | 
| Orbital parameters | |
| Reference system | Geocentric | 
| Regime | Low Earth | 
| Perigee altitude | 390 kilometres (240 mi) | 
| Apogee altitude | 392 kilometres (244 mi) | 
| Inclination | 51.6 degrees | 
| Period | 92.4 minutes | 
| Docking with Mir | |
| Docking date | 7 September 1989, 22:25:26: UTC | 
| Undocking date | 19 February 1990, 01:06:20 UTC | 
| Soyuz programme (Crewed missions) | |
Soyuz TM-8 was a 1989 spaceflight which carried the fifth long duration crew to the Soviet space station Mir. It was part of the Soyuz-TM series of spacecraft, which were the fourth generation of the Soviet Soyuz. Soyuz TM-8 was the eighth crewed spaceflight to Mir, and spent 166 days in orbit.