EntityQ3398195· pop 5· linked from 137 articlesKosmos 1661Sign in to saveRussian military early warning satelliteConnectionsSTS-51-JEntityPlesetsk CosmodromeEntityInternational DesignatorEntitySTS-51-CEntityRussianEntityartificial satelliteEntityorbitEntitydigital object identifierEntityInternational Standard Serial NumberEntityorbital periodEntityapsisEntitybibcodeEntityorbital inclinationEntityGiottoEntitygeocentric orbitEntityQ22908627Entityoptical telescopeEntitythermographyEntitySatellite Catalog NumberEntitySTS-51-FEntityCategories1985 in spaceflightKosmos satellitesOkoSpacecraft launched by Molniya-M rocketsSpacecraft launched in 1985