DOS-8 serial number 128 was originally designed as the backup to Mir and possibly the core module of Mir-2.

Planned EOM-1 shuttle mission. Cancelled after Challenger disaster. No crew named, later combined with STS-61K

Unusable orbit. Was intended to cover Oko constellation plane 1 - 272 degree longitude of ascending node. References: 1 , 2 , 5 , 6 , 64 , 65 , 100 .

Capsule re-entered 10/11/86. References: 1 , 2 , 5 , 6 .

Military topographic / cartographic satellite. References: 1 , 2 , 6 , 101 , 102 .

Replaced Cosmos 1596. Covered Oko constellation plane 9 - 233 degree longitude of ascending node. References: 1 , 2 , 5 , 6 , 100 .

First attempted launch of full load of Strela-3 military store-dump communications satellite fails to reach orbit. References: 5 , 105 , 279 .

Replaced Molniya 3-21. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network and within the framework of international cooperation. References: 1 , 2 , 5 , 6 .

Radar calibration mission. References: 1 , 2 , 5 , 6 .

Military cartographic satellite; returned film capsule. References: 1 , 2 , 6 .

Mass model of Orlets-2 reconnaissance satellite. References: 279 .

Stationed at 36 deg E. Provision of telephone and telegraph radiocommunications and television broadcasting. References: 1 , 2 , 5 , 6 , 67 , 274 .

Radar calibration mission. References: 1 , 2 , 5 , 6 .

Investigation of the natural resources of the earth in the interests of various branches of the national economy of the USSR and international cooperation. References: 1 , 2 , 6 .

Kvant was originally to be launched in late 1986 but problems with its scientific payload resulted in it spending 14 months (versus 5 planned!) at the spacecraft integration hall at Korolev.

Planned shuttle mission for deployment of commercial communications satellites. Would have launched the first American journalist in space from Launch Complex 39B. Cancelled after Challenger disaster.

Military cartographic satellite; returned film capsule. References: 1 , 2 , 6 .

Secret initiative to send arms to Iran revealed.Reagan denies exchanging arms for hostages and halts arms sales.

Replaced Cosmos 1553. Civilian navigation satellite. Positioned in plane 11 of constellation. References: 1 , 2 , 5 , 6 , 107 .

High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission. References: 1 , 2 , 6 , 179 .

Polar Beacon and Research satellite. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). References: 1 , 2 , 5 , 6 .

Replaced Molniya 1-60. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network. References: 1 , 2 , 5 , 6 .

Stationed at 90 deg E. Provision of telephone and telegraph radiocommunications and television broadcasting. References: 1 , 2 , 5 , 6 , 67 , 111 , 274 .

Replaced Cosmos 1687. Covered Oko constellation plane 2 - 313 degree longitude of ascending node. References: 1 , 2 , 5 , 6 , 100 .

Eight satellites launched by a single carrier rocket. References: 1 , 2 , 5 , 6 .

Military navigation satellite. Replaced Cosmos 1605. References: 1 , 2 , 5 , 6 .

Planned shuttle mission. Cancelled after Challenger disaster.

Investigation of the upper atmosphere and outer space. References: 1 , 2 , 5 , 6 , 114 .

Military cartographic satellite; returned film capsule. References: 1 , 2 , 6 .

Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Launch vehicle put payload into geosynchronous transfer orbit References: 1 , 2 , 5 , 6 , 278 .

First automatic landing from 4000 m altitude. Time 24 minutes. References: 81 .

Replaced Cosmos 1729. Covered Oko constellation plane 5 - 73 degree longitude of ascending node. References: 1 , 2 , 5 , 6 , 100 .

High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission. References: 1 , 2 , 6 , 179 .

Military navigation satellite. Replaced Cosmos 1704, Cosmos 1598. References: 1 , 2 , 5 , 6 .

Development of research apparatus and methods of remote sensing and monitoring of the Earth's ionosphere, and also study of the propagation of radio waves in the ionosphere. References: 1 , 2 , 5 , 6 .

Time 17 minutes. References: 81 .

Suborbital test of 1/8 scale model of Buran. Typical trajectory: ascent to 120 km; pitch down to drive model in atmosphere at 45 degree at Mach 18.5. None were reflown but at least 4 were recovered. References: 81 .

Photo/digital surveillance. References: 1 , 2 , 6 .

Replaced Molniya 1-62. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network. References: 1 , 2 , 5 , 6 .

Time 17 minutes. References: 81 .