Soyuz 37
| Crew: Viktor Gorbatko with Phạm Tuân | |
| COSPAR ID | 1980-064A | 
|---|---|
| SATCAT no. | 11905 | 
| Mission duration | 79 days, 15 hours, 16 minutes, 54 seconds | 
| Orbits completed | 124 | 
| Spacecraft properties | |
| Spacecraft type | Soyuz 7K-T | 
| Manufacturer | NPO Energia | 
| Launch mass | 6,800 kilograms (15,000 lb) | 
| Crew | |
| Crew size | 2 | 
| Launching | Viktor Gorbatko Pham Tuân | 
| Landing | Leonid Popov Valery Ryumin | 
| Callsign | Терек (Terek – Terek River | 
| Start of mission | |
| Launch date | July 23, 1980, 18:33:03 UTC | 
| Rocket | Soyuz-U | 
| Launch site | Baikonur 1/5 | 
| End of mission | |
| Landing date | October 11, 1980, 09:49:57 UTC | 
| Landing site | 180 kilometres (110 mi) SE of Dzhezkazgan | 
| Orbital parameters | |
| Reference system | Geocentric | 
| Regime | Low Earth | 
| Perigee altitude | 197.8 kilometres (122.9 mi) | 
| Apogee altitude | 293.1 kilometres (182.1 mi) | 
| Inclination | 51.61 degrees | 
| Period | 89.12 minutes | 
| Docking with Salyut 6 | |
| Soyuz programme (Crewed missions) | |
Soyuz 37 (Russian: Союз 37, Union 37) was a 1980 Soviet crewed space flight to the Salyut 6 space station. It was the 13th mission to and 11th successful docking at the orbiting facility. The Soyuz 37 crew were the third to visit the long-duration Soyuz 35 resident crew.
Soyuz 37 carried Soviet Viktor Gorbatko and Pham Tuan, the first Asian and first Vietnamese cosmonaut, into space. They swapped Soyuz craft with the long-duration crew and returned to Earth in Soyuz 36, the resident crew later used their craft to return to Earth.