Progress 31
Soviet uncrewed Progress cargo spacecraft
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Progress 31 (Russian: Прогресс 31) was a Soviet uncrewed Progress cargo spacecraft, which was launched in August 1987 to resupply the Mir space station.
A Progress 7K-TG spacecraft | |
| Mission type | Mir resupply |
|---|---|
| COSPAR ID | 1987-066A |
| SATCAT no. | 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 with Mir | |
| Docking port | Kvant-1 aft[3] |
| Docking date | 5 August 1987, 22:27:35 UTC |
| Undocking date | 21 September 1987, 23:57:41 UTC |
Launch
Progress 31 launched on 3 August 1987 from the Baikonur Cosmodrome in the Kazakh SSR. It used a Soyuz-U2 rocket.[2][4]
