 A Progress 7K-TG spacecraft | |
| Mission type | Mir resupply |
|---|---|
| COSPAR ID | 1987-066A |
| SATCATno. | 18283[1] |
| Spacecraft properties | |
| Spacecraft | Progress (No.138) |
| Spacecraft type | Progress 7K-TG[2] |
| Manufacturer | NPO Energia |
| Start of mission | |
| Launch date | 3 August 1987, 20:44:11 UTC[1] |
| Rocket | Soyuz-U2[2] |
| Launch site | Baikonur,Site 1/5 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 23 September 1987, 00:22:00 UTC[3] |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 187 km[3] |
| Apogee altitude | 250 km[3] |
| Inclination | 51.6°[3] |
| Period | 88.9 minutes[3] |
| Epoch | 3 August 1987 |
| Docking withMir | |
| Docking port | Kvant-1 aft[3] |
| Docking date | 5 August 1987, 22:27:35 UTC |
| Undocking date | 21 September 1987, 23:57:41 UTC |
Progress 31 (Russian:Прогресс 31) was aSoviet uncrewedProgress cargo spacecraft, which was launched in August 1987 to resupply theMir space station.
Progress 31 launched on 3 August 1987 from theBaikonur Cosmodrome in theKazakh SSR. It used aSoyuz-U2 rocket.[2][4]
Progress 31 docked with the aft port of theKvant-1 module of Mir on 5 August 1987 at 22:27:35 UTC, and was undocked on 21 September 1987 at 23:57:41 UTC.[3][5]
It remained in orbit until 23 September 1987, when it was deorbited. The deorbit burn occurred at 00:22:00 UTC and the mission ended at 01:02 UTC.[3][5]
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