KELT-3 is a star with 1.96 times the mass of the Sun, and 1.7 times its radius. It is located 685.75 light years away from the solar system and is estimated to be 3 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
KELT-3 is known to have 1 exoplanets in orbit around it.
KELT-3 b was discovered by the KELT observatory, in 2013-08, using the transit method. Its semi-major axis is 0.04 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of KELT-3 b is 616.920 times the mass of Earth. The radius of KELT-3 b is 17.486 that of Earth. At more than 50 Earth masses, KELT-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.