TrES-3 is a star with 0.93 times the mass of the Sun, and 0.83 times its radius. It is located 754.52 light years away from the solar system and is estimated to be 1 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
TrES-3 is known to have 1 exoplanets in orbit around it.
TrES-3 b was discovered by the TrES observatory, in 2007-07, using the transit method. Its semi-major axis is 0.02 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of TrES-3 b is 607.380 times the mass of Earth. The radius of TrES-3 b is 14.975 that of Earth. At more than 50 Earth masses, TrES-3 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.