 | |
| Mission type | Salyut 6 resupply |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1978-070A |
| SATCATno. | 10979 |
| Mission duration | 27 days, 14 hours and 49 minutes |
| Spacecraft properties | |
| Spacecraft | Progress s/n 101 |
| 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 July 1978, 11:26:16 UTC |
| Rocket | Soyuz-U s/n S15000-128 |
| Launch site | Baikonur,Site 31/6 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 4 August 1978, 02:15 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 193 km |
| Apogee altitude | 262 km |
| Inclination | 51.66° |
| Period | 88.7 minutes |
| Epoch | 7 July 1978 |
| Docking withSalyut 6 | |
| Docking port | Aft |
| Docking date | 9 July 1978, 12:58:59 UTC |
| Undocking date | 2 August 1978, 04:57:44 UTC |
| Time docked | 23 days, 15 hours and 59 minutes |
| Cargo | |
| Mass | 2500 kg |
| Fuel | 600 kg |
Progress 2 (Russian:Прогресс 2) was an unmannedProgress cargo spacecraft launched by theSoviet Union in 1978 to resupply theSalyut 6 space station. It used theProgress 7K-TG configuration, and was the second Progress mission to Salyut 6. It carried supplies for theEO-2 crew aboard Salyut 6, as well as equipment for conducting scientific research, and fuel for adjusting the station's orbit and performing manoeuvres.
Progress 2 was a Progress 7K-TG spacecraft. The second of forty three to be launched, it had theserial number 101.[1][2] The Progress 7K-TG spacecraft was the first generationProgress, derived from theSoyuz 7K-T and intended for unmanned logistics missions to space stations in support of theSalyut programme.[3] On some missions the spacecraft were also used to adjust the orbit of the space station.[4]
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.[3][4]
Progress 2 was launched at 11:26:16 UTC on 7 July 1978, atop aSoyuz-U 11A511U carrier rocket flying fromSite 31/6 at theBaikonur Cosmodrome in theKazakh Soviet Socialist Republic. The rocket that launched it had theserial number S15000-128.[5] Following launch, Progress 2 was given the COSPAR designation 1978-070A, whilstNORAD assigned it theSatellite Catalog Number 10979.[6]
Following launch, Progress 2 began two days of free flight. It subsequently docked with the aft port of the Salyut 6 space station at 12:58:59 UTC on 9 July.[3][7] At the time of its docking,Soyuz 29 was docked to the forward port of the station. Soyuz 29 remained docked throughout the time Progress 2 was docked.[8]
Progress 2 was the second of twelve Progress spacecraft used to supply the Salyut 6 space station between 1978 and 1981.[6] It delivered cargo to the station, includingKristall akiln used for experiments aboard the outpost.[8] Progress 2 also transferred 600 kilograms (1,300 lb) of propellant into Salyut 6's tanks.[9] Whilst Progress 2 was docked, Salyut 6 was manned by theEO-2 crew, consisting ofcosmonautsVladimir Kovalyonok andAleksandr Ivanchenkov.[10]
On 29 July 1978, whilst docked to Salyut 6, Progress 2 was catalogued in alow Earth orbit with aperigee of 327 kilometres (203 mi) and anapogee of 330 kilometres (210 mi),inclined at 51.66° and with aperiod of 91.1 minutes.[11] Progress 2 undocked from Salyut 6 at 04:57:44 UTC on 2 August. It remained in orbit until the early morning of 4 August 1978, when it was deorbited. The deorbit burn occurred at 01:31:07 UTC, with the spacecraft undergoing a destructivereentry at around 02:15 UTC.[11][7] Less than four days after Progress 2 had been deorbited,Progress 3 was launched to replace it.[2]
This article incorporates text from this source, which is in thepublic domain. This article incorporates text from this source, which is in thepublic domain.