. . . "The Delta 5000 series was an American expendable launch system which was used to conduct an orbital launch in 1989. It was a member of the Delta family of rockets. Although several variants were put forward, only the Delta 5920 was launched. The designation used a four digit numerical code to store information on the configuration of the rocket."@en . "Delta 5000 series"@en . . . "Retired" . "1"^^ . "1"^^ .