STS 55, also known as Columbia (STS-55), is a crewed spacecraft with the configuration of a winged orbiter and a shape described as box + 2 wings + fin. It was launched on April 26, 1993, from LC39A at AFETR using a Space Shuttle launch vehicle. The satellite has a length of 37.3 meters, diameter of 23.8 meters, and span of 37.3 meters, with a dry mass of 91,642 kg and a launch mass of 99,329 kg. It is equipped with fuel cells and batteries for power and has an RCS (Reaction Control System) thrust of 94.2 Newtons. The spacecraft was manufactured by RWI for the purpose of serving as a crewed vehicle and is owned by JSC. Its equipment details are not specified, and it carries a payload designated as OV-102. The satellite's mission is to serve as a crewed spacecraft.