Kepler-428 is a star with 0.87 times the mass of the Sun, and 0.8 times its radius. It is located 2238.36 light years away from the solar system and is estimated to be 5 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
Kepler-428 is known to have 1 exoplanets in orbit around it.
Kepler-428 b was discovered by the Kepler observatory, in 2014-12, 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 Kepler-428 b is 403.860 times the mass of Earth. The radius of Kepler-428 b is 12.110 that of Earth. At more than 50 Earth masses, Kepler-428 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.