Kosmos-1669 (Russian: Космос-1669) was a Progress spacecraft used to resupply the Salyut 7 space station. It was a Progress 7K-TG spacecraft with the serial number 126.
Mission type | Salyut 7 resupply |
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Operator | OKB-1 |
COSPAR ID | 1985-062A ![]() |
SATCAT no. | 15918 |
Mission duration | 42 days |
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 | Baikonur 1/5 |
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 with Salyut 7 | |
Docking port | Aft |
Docking date | 21 July 1985, 15:05 UTC |
Undocking date | 28 August 1985, 21:50 UTC |
Time docked | 38 days |
Cargo | |
Mass | 2500 kg |
Kosmos-1669 was launched by a Soyuz-U carrier rocket from Site 1/5 at the Baikonur 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 the Pacific Ocean at 01:20 UTC.
Kosmos-1669 was the second cargo spacecraft (after Progress 24) to visit Salyut 7 after its reactivation, and also the last Progress flight as part of the Salyut programme. It delivered new spacesuit, 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 an TKS 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 to Mir.[1]
As of 2009, Kosmos-1669 is the only Progress spacecraft to have received a Kosmos 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 a TKS spacecraft which later became Kosmos 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]
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← 1984 · Orbital launches in 1985 · 1986 → | |
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Sakigake | Kosmos 1616 | Kosmos 1617 · Kosmos 1618 · Kosmos 1619 · Kosmos 1620 · Kosmos 1621 · Kosmos 1622 | Molniya-3 No.36 | Kosmos 1623 | Kosmos 1624 | Gorizont No.21L | Kosmos 1625 | Kosmos 1626 | STS-51-C (USA-8) | Kosmos 1627 | Kosmos 1628 | Meteor-2 No.13 | USA-9 | Arabsat-1A · Brasilsat A1 | Kosmos 1629 | Kosmos 1630 | Kosmos 1631 | Kosmos 1632 | Kosmos 1633 | Geosat | Kosmos 1634 | Kosmos 1635 · Kosmos 1636 · Kosmos 1637 · Kosmos 1638 · Kosmos 1639 · Kosmos 1640 · Kosmos 1641 · Kosmos 1642 | Ekran No.28L | Intelsat VA F-10 | Kosmos 1643 | Kosmos 1644 | STS-51-D (Anik C1 · Leasat 3) | Unnamed | Kosmos 1645 | Kosmos 1646 | Kosmos 1647 | Kosmos 1648 | Prognoz 10 | STS-51-B (Nusat) | GStar-1 · Telecom 1B | Kosmos 1649 | Kosmos 1650 · Kosmos 1651 · Kosmos 1652 | Kosmos 1653 | Kosmos 1654 | Molniya-3 No.39 | Kosmos 1655 | Kosmos 1656 | Soyuz T-13 | Kosmos 1657 | Kosmos 1658 | Kosmos 1659 | Kosmos 1660 | STS-51-G (Morelos 1 · Arabsat-1B · Telstar 3D · SPARTAN-101) | Kosmos 1661 | Kosmos 1662 | Progress 24 | Kosmos 1663 | Unnamed | Kosmos 1664 | Intelsat VA F-11 | Giotto | Kosmos 1665 | Kosmos 1666 | Kosmos 1667 | Kosmos 1668 | Molniya-3 No.37 | Kosmos 1669 | STS-51-F (PDP) | Kosmos 1670 | Kosmos 1671 | Transit-O 24 · Transit-O 30 | Kosmos 1672 · Kosmos 1672 | Kosmos 1673 | Kosmos 1674 | Gran' No.26L | Kosmos 1675 | Kosmos 1676 | Suisei | Molniya-1 No.61 | Kosmos 1677 | STS-51-I (Aussat A1 · ASC-1 · Leasat 4) | Unnamed | Kosmos 1678 | Kosmos 1679 | Kosmos 1680 | Kosmos 1681 | ECS-3 · Spacenet 3 | Soyuz T-14 | Kosmos 1682 | Kosmos 1683 | Kosmos 1684 | Kosmos 1685 | Kosmos 1686 | Intelsat VA F-12 | Kosmos 1687 | Kosmos 1688 | Kosmos 1689 | Molniya-3 No.38 | STS-51-J (USA-11 · USA-12) | USA-10 | Kosmos 1690 · Kosmos 1695 · Kosmos 1692 · Kosmos 1693 · Kosmos 1694 · Kosmos 1691 | Kosmos 1696 | Fanhui Shi Weixing 8 | Kosmos 1697 | Kosmos 1698 | Molniya-1 No.73 | Unnamed | Meteor-3 No.2 | Kosmos 1699 | Kosmos 1700 | Molniya-1 No.56 | STS-61-A (GLOMR) | Kosmos 1701 | Kosmos 1702 | Gran' No.28L | Kosmos 1703 | STS-61-B (Morelos 2 · Aussat A2 · Satcom K2 · OEX · EASE/ACCESS) | Kosmos 1704 | Kosmos 1705 | Kosmos 1706 | Kosmos 1707 | USA-13 · USA-14 | Kosmos 1708 | Kosmos 1709 | Molniya-3 No.40 | Kosmos 1710 · Kosmos 1711 · Kosmos 1712 | Meteor-2 No.14 | Kosmos 1713 | Kosmos 1714 | |
Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets). |