EntityQ3400824· pop 5· linked from 143 articlesKosmos 520Sign in to saveRussian military early warning satelliteConnectionsApollo 16EntityPlesetsk CosmodromeEntityInternational DesignatorEntityRussianEntitySoviet UnionConceptartificial satelliteEntitydigital object identifierEntityInternational Standard Serial NumberEntityorbital periodEntityapsisEntityPioneer 10EntityApollo 17ConceptbibcodeEntityorbital inclinationEntitygeocentric orbitEntityQ22908627Entityoptical telescopeEntitythermographyEntityVenera 8EntityLuna 20EntityCategories1972 in spaceflightKosmos satellitesOkoSpacecraft launched by Molniya-M rocketsSpacecraft launched in 1972