Progress M-4
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Progress M-4 (Russian: Прогресс М-4) was a Soviet uncrewed cargo spacecraft which was launched in 1990 to resupply the Mir space station.[2] The twenty-second of sixty four Progress spacecraft to visit Mir, it used the Progress-M 11F615A55 configuration, and had the serial number 204.[3] It carried supplies including food, water and oxygen for the EO-7 crew aboard Mir, as well as equipment for conducting scientific research, and fuel for adjusting the station's orbit and performing manoeuvres.
| Mission type | Mir resupply |
|---|---|
| COSPAR ID | 1990-072A |
| SATCAT no. | 20752 |
| Spacecraft properties | |
| Spacecraft type | Progress-M 11F615A55 |
| Manufacturer | NPO Energia |
| Launch mass | 7,250 kilograms (15,980 lb) |
| Start of mission | |
| Launch date | 15 August 1990, 04:00:41 UTC |
| Rocket | Soyuz-U2 |
| Launch site | Baikonur Site 1/5 |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 20 September 1990, 11:42:49 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 368 kilometres (229 mi)[1] |
| Apogee altitude | 403 kilometres (250 mi)[1] |
| Inclination | 51.6 degrees |
| Docking with Mir | |
| Docking port | Core Forward |
| Docking date | 17 August 1990, 05:26:13 UTC |
| Undocking date | 17 September 1990, 12:42:43 UTC |
| Time docked | 1 month |
Progress M-4 was launched at 04:00:41 GMT on 15 August 1990, atop a Soyuz-U2 carrier rocket flying from Site 1/5 at the Baikonur Cosmodrome.[3] It docked with the forward port of Mir's Core module at 05:26:13 GMT on 17 August.[4][5]
During the month for which Progress M-4 was docked, Mir was in an orbit of around 368 by 403 kilometres (199 by 218 nmi), inclined at 51.6 degrees.[1] Progress M-4 undocked from Mir at 12:42:43 GMT on 17 September, and was deorbited three days later on 20 September, with the deorbit burn starting at 11:04:27.[4] It burned up in the atmosphere over the Pacific Ocean, with remaining debris landing in the ocean at around 11:42:49.[1][4]
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