ホット・ジュピター
Kepler-5b is a Hot Jupiter with a mass that is 2.114 times that of Jupiter and a radius of 1.431 times Jupiter's radius. This also means that Kepler-5b is not very dense. The planet's measured density is 0.894 grams/cm3, less than that of pure water and comparable only to the density of Saturn, which is approximately 0.69 grams/cm3. The planet has an equilibrium temperature of 1868 K, making it fifteen times hotter than Jupiter.