Kepler-454 and Its Three Known Planets

Kepler-454 is a star 753 light-years away with three known planets. The host star is 5.25 billion years old, with a mass of 1.03 solar masses and a radius of 1.07 solar radii; its reported temperature is 5700 K, cooler than the Sun's, and its radius estimate is larger than the Sun's.

Kepler-454 b is a Super-Earth discovered by the transit method in 2015. It has a mass of 5.4 Earth masses, a radius of 2.37 Earth radii, and an orbital period of 10.6 days. Both its mass and radius estimates are larger than Earth's, and its mean density is 2.24 g/cm³, 0.406 times Earth's. Among the listed planets, it has the shortest year.

Kepler-454 c was discovered by radial velocity in 2015. This method measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. Its minimum mass is 1430 Earth masses, roughly 4.51 times Jupiter's mass and larger than Earth's, and its orbital period is 524 days, the second-shortest among the listed planets.

Kepler-454 d was discovered by radial velocity in 2023 and has a minimum mass of 734 Earth masses, roughly 2.31 times Jupiter's mass and larger than Earth's. Its orbital period is 4070 days, the longest among the listed planets.