 A Progress 7K-TG spacecraft | |
| Mission type | Salyut 6 resupply |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1978-077A |
| SATCAT no. | 10999 |
| Mission duration | 16 days |
| Spacecraft properties | |
| Spacecraft | Progress s/n 103 |
| Spacecraft type | Progress 7K-TG |
| Manufacturer | NPO Energia |
| Launch mass | 7020 kg |
| Dry mass | 6520 kg |
| Payload mass | 2500 kg |
| Dimensions | 7.48 m in length and 2.72 m in diameter |
| Start of mission | |
| Launch date | 7 August 1978, 22:31:22 UTC |
| Rocket | Soyuz-U s/n Ye15000-138 |
| Launch site | Baikonur, Site 31/6 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 23 August 1978, 17:30 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 195 km |
| Apogee altitude | 249 km |
| Inclination | 51.66° |
| Period | 88.7 minutes |
| Epoch | 7 August 1978 |
| Docking with Salyut 6 | |
| Docking port | Aft |
| Docking date | 9 August 1978, 23:59:30 UTC |
| Undocking date | 21 August 1978, 15:42:50 UTC |
| Time docked | 15.18 days |
| Cargo | |
| Mass | 2500 kg |
Progress 3 (Russian: Прогресс 3) was an unmanned Progress cargo spacecraft launched by the Soviet Union in 1978 to resupply the Salyut 6 space station. It used the Progress 7K-TG configuration, and was the third Progress mission to Salyut 6. It carried supplies for the EO-2 crew aboard Salyut 6, as well as equipment for conducting scientific research, and fuel for adjusting the station's orbit and performing manoeuvres.