Progress 4
 A Progress 7K-TG spacecraft | |
| Mission type | Salyut 6resupply |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1978-090A |
| SATCATno. | 11040[1] |
| 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[1] |
| 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[2] |
| 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 withSalyut 6 | |
| Docking port | Aft[3] |
| 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 aProgresscargo spacecraft launched by theSoviet Unionin 1978 to resupply theSalyut 6space station. It used theProgress 7K-TGconfiguration 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.
Spacecraft[edit]
Progress 4 was a Progress 7K-TG spacecraft. The fourth of forty three to be launched, it had theserial number105.[4][5]The Progress 7K-TG spacecraft was the first generationProgress,derived from theSoyuz 7K-Tand intended for uncrewed logistics missions to space stations in support of theSalyut programme.On some missions the spacecraft were also used to adjust the orbit of the space station.[6]
The Progress spacecraft had a dry mass of 6,520 kilograms (14,370 lb), which increased to around 7,020 kilograms (15,480 lb) when fully fuelled. It measured 7.48 metres (24.5 ft) in length, and 2.72 metres (8 ft 11 in) in diameter. Each spacecraft could accommodate up to 2,500 kilograms (5,500 lb) of payload, consisting of dry cargo and propellant. The spacecraft were powered by chemical batteries, and could operate in free flight for up to three days, remaining docked to the station for up to thirty.[6]
Launch[edit]
Progress 4 launched on 3 October 1978 at 23:09:30 UTC from theBaikonur Cosmodromein theKazakh Soviet Socialist Republic.It used aSoyuz-Urocket.[4]
Docking[edit]
Progress 4 docked with Salyut 6 on 6 October 1978 at 01:00:15 UTC.[7]
Decay[edit]
It remained in orbit until 26 October 1978, when it was deorbited. The deorbit burn occurred at 16:28 UTC.
See also[edit]
- 1978 in spaceflight
- List of Progress missions
- List of uncrewed spaceflights to Salyut space stations
References[edit]
- ^ab"Launchlog".Jonathan's Space Report.Retrieved23 December2017.
- ^"Progress 4".NASA.Retrieved23 December2017.
This article incorporates text from this source, which is in thepublic domain.
- ^"Cargo spacecraft" Progress-4 "".Manned Astronautics figures and facts.Archived fromthe originalon 10 September 2007.
- ^abKrebs, Gunter."Progress 1 - 42 (11F615A15, 7K-TG)".Gunter's Space Page.Retrieved26 November2010.
- ^McDowell, Jonathan."Launch Log".Jonathan's Space Page.Retrieved26 November2010.
- ^abHall, Rex D.; Shayler, David J. (2003).Soyuz: A Universal Spacecraft.Springer-Praxis. pp. 239–250.ISBN1-85233-657-9.
- ^"Salyut 6".Astronautix.Archived fromthe originalon 10 December 2016.Retrieved23 December2017.