CoRoT-9 is a star with 0.96 times the mass of the Sun, and 0.96 times its radius. It is located 1346.96 light years away from the solar system and is estimated to be 6 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
CoRoT-9 is known to have 1 exoplanets in orbit around it.
CoRoT-9 b was discovered by the CoRoT observatory, in 2010-03, using the transit method. Its semi-major axis is 0.40 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of CoRoT-9 b is 267.120 times the mass of Earth. The radius of CoRoT-9 b is 11.949 that of Earth. At more than 50 Earth masses, CoRoT-9 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn in our solar system.