Progress 4
A Progress 7K-TG spacecraft | |
| Mission type | Salyut 6 resupply |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1978-090A |
| SATCAT no. | 11040 |
| Mission duration | 23 days |
| Spacecraft properties | |
| Spacecraft | Progress s/n 105 |
| Spacecraft type | Progress 7K-TG |
| Manufacturer | NPO Energia |
| Launch mass | 7281 kg |
| Dry mass | 7020 kg |
| Payload mass | 2436 kg |
| Dimensions | 7.48 m in length and 2.72 m in diameter |
| Start of mission | |
| Launch date | 3 October 1978, 23:09:30 UTC |
| Rocket | Soyuz-U s/n Ye15000-152 |
| Launch site | Baikonur, 1/5 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 26 October 1978, 16:28 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 191 km |
| Apogee altitude | 266 km |
| Inclination | 51.66° |
| Period | 88.8 minutes |
| Epoch | 3 October 1978 |
| Docking with Salyut 6 | |
| Docking port | Aft |
| Docking date | 6 October 1978, 01:00:15 UTC |
| Undocking date | 24 October 1978, 13:01:52 UTC |
| Time docked | 18.5 days |
| Cargo | |
| Mass | 2436 kg |
| Pressurised | 1230 kg |
| Fuel | 705 kg |
| Gaseous | 50 kg |
| Water | 420 kg |
Progress 4 (Russian: Прогресс 4), was a 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 fourth Progress mission to Salyut 6. It carried supplies aboard Salyut 6, as well as equipment for conducting scientific research, and fuel for adjusting the station's orbit and performing manoeuvres.