Thor DM-21 Ablestar – United States Air Force Family: Thor-Ablestar meters Length: 29 meters Diameter: 1.44 meters Launch Mass: 51 Low Earth Orbit Capacity: 150 The Thor DM-21 Ablestar was manufactured by United States Air Force with the first launch on 1960-04-13. Thor DM-21 Ablestar has 2 successful launches and 1 failed launches with a total of 3 launches. The Thor-Ablestar, or Thor Able-Star, also known as Thor-Epsilon was an early American expendable launch system consisting of a PGM-17 Thor missile, with an Ablestar upper stage. It was a member of the Thor family of rockets, and was derived from the Thor-Able. Manufacturer United States Air Force is a Government USA entity that was founded in and is administered by . United States Air Force has 19 successful launches and 12 failed launches with a total of 31 launches.