51 Pegasi b is the first discovered planet of its parent star, 51 Pegasi. If any more are discovered they will be named 51 Pegasi c, 51 Pegasi d, and so on. The planet has been informally named Bellerophon. After its discovery, many teams proved its existence and continued to find out more about its properties, including the fact that it orbits very close to the star, has estimated temperatures around 1200 Celsius, and has a minimum mass about half that of Jupiter.