 The return capsule of Soyuz 29 on display at the Deutsches Museum in Munich, Germany | |
| Operator | Soviet space program |
|---|---|
| COSPAR ID | 1978-061A |
| SATCAT no. | 10952 |
| Mission duration | Capsule: 79 days, 15 hours and 23 minutes Original crew: 139 days, 14 hours and 47 minutes |
| Spacecraft properties | |
| Spacecraft type | Soyuz 7K-T |
| Manufacturer | NPO Energia |
| Launch mass | 6,800 kg (15,000 lb) |
| Crew | |
| Crew size | 2 |
| Launching | Vladimir Kovalyonok Aleksandr Ivanchenkov |
| Landing | Valery Bykovsky Sigmund Jähn |
| Callsign | Фотон (Foton – "Photon") |
| Start of mission | |
| Launch date | 15 June 1978, 20:16:45 UTC |
| Rocket | Soyuz-U |
| Launch site | Baikonur 1/5[1] |
| End of mission | |
| Landing date | 3 September 1978, 11:40:34 UTC |
| Landing site | 46°42′N 68°42′E / 46.7°N 68.7°E |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 197.8 km (122.9 mi) |
| Apogee altitude | 266 km (165 mi) |
| Inclination | 51.65 degrees |
| Period | 88.86 minutes |
| Docking with Salyut 6[2] | |
| Docking port | Front |
| Docking date | 16 June 1978, 21:58:14 UTC |
| Undocking date | 3 September 1978, 08:23 UTC |
| Time docked | 78 days, 10 hours and 24 minutes |
 Soviet stamp featuring Kovalyonok and Ivanchenkov (1978) | |
Soyuz 29 (Russian: Союз 29, Union 29) was a 1978 crewed Soviet space mission to the Salyut 6 space station.[2] It was the fifth mission, the fourth successful docking, and the second long-duration crew for the orbiting station. Commander Vladimir Kovalyonok and flight engineer Aleksandr Ivanchenkov established a new space-endurance record of 139 days.
The crew returned in Soyuz 31, which had been swapped by a crew launched in August who returned in Soyuz 29.