Centaur
Rocket stage
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The Centaur is a family of rocket propelled upper stages that has been in use since 1962. It is currently produced by U.S. launch service provider United Launch Alliance, with one main active version and one version under development. Wikipedia
Empty mass: 2,247 kg (4,954 lb), single engine; 2,462 kg (5,428 lb), dual engine
First flight: May 9, 1962; 61 years ago
Height: 12.68 m (499 in)
Manufacturer: United Launch Alliance
Maximum thrust: 99.2 kN (22,300 lbf), per engine
Powered by: 1 or 2 RL10
Propellant: LH2 / LOX