 | |
| Mission type | Salyut 7 resupply |
|---|---|
| Operator | OKB-1 |
| COSPAR ID | 1985-062A |
| SATCATno. | 15918 |
| Mission duration | 41 days, 12 hours and 15 minutes |
| Spacecraft properties | |
| Spacecraft | Progress s/n 126 |
| Spacecraft type | Progress 7K-TG |
| Manufacturer | NPO Energia |
| Launch mass | 7280 kg |
| Dry mass | 7020 kg |
| Payload mass | 2500 kg |
| Dimensions | 7.48 m in length and 2.72 m in diameter |
| Start of mission | |
| Launch date | 19 July 1985, 13:05 UTC |
| Rocket | Soyuz-U s/n B15000-446 |
| Launch site | Baikonur1/5 |
| Contractor | OKB-1 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 30 August 1985, 01:20 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 298 km |
| Apogee altitude | 358 km |
| Inclination | 51.66° |
| Period | 91.0 minutes |
| Epoch | 19 July 1985 |
| Docking withSalyut 7 | |
| Docking port | Aft |
| Docking date | 21 July 1985, 15:05 UTC |
| Undocking date | 28 August 1985, 21:50 UTC |
| Time docked | 38 days, 6 hours and 45 minutes |
| Cargo | |
| Mass | 2500 kg |
Kosmos 1669 (Russian:Космос-1669) was aProgress spacecraft used to resupply theSalyut 7space station. It was aProgress 7K-TG spacecraft with theserial number 126.
Kosmos-1669 was launched by aSoyuz-U carrier rocket fromSite 1/5 at theBaikonur Cosmodrome, at 13:05 UTC on 19 July 1985. The spacecraft docked with the aft port of Salyut 7 at 15:05 UTC on 21 July 1985. Following undocking on 28 August 1985, it moved away from the station, before returning and redocking to test the reliability of the docking system.[1] It undocked for a second time at 21:50 UTC,[2] and was deorbited on 30 August 1985, with the spacecraft burning up over thePacific Ocean at 01:20 UTC.
Kosmos-1669 was the second cargo spacecraft (afterProgress 24) to visit Salyut 7 after its reactivation, and also the last Progress flight as part of theSalyut programme. It delivered newspacesuit, to replace ones damaged by cold temperatures whilst Salyut 7 was deactivated,[3] as well as replacement parts and consumables. This Progress mission was followed by one last cargo mission to Salyut 7, but carried out by anTKS spacecraft:TKS-4, which would become the fourth and last flight of an TKS spacecraft. The next following mission of a Progress cargo spacecraft,Progress 25, flew toMir.[1]
As of 2009, Kosmos-1669 is the only Progress spacecraft to have received aKosmos designation, which are usually reserved for military, experimental and failed spacecraft. It has been reported that this may have been an error due to confusion with aTKS spacecraft which later becameKosmos 1686,[4] or that the spacecraft may have gone out of control shortly after launch, but then been recovered after the Kosmos designation had been applied.[1] Alternatively, it could have been given the designation as it was used to test modifications that would be used on future Progress missions.[3] Some news agencies reported that it was a free-flying Progress-derived spacecraft,[3] or that it was a new type of spacecraft derived from the Progress.[5]
This article incorporates text from this source, which is in thepublic domain.