Kepler-328: A Distant Star With Two Transiting Worlds

Kepler-328 is a star located 7,220 light-years away, and two planets have been found orbiting it. The star is 2.57 billion years old and has a mass of 1.24 solar masses and a radius of 1.36 solar radii, both larger than the Sun's corresponding values. Its temperature of 6,300 K is also hotter than the Sun's. Both planets were discovered by transit in 2013, a method in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness.

Kepler-328 b is classified as a Super-Earth. It has a radius of 2.3 Earth radii, a mass of 28.5 Earth masses, and an orbital period of 34.9 days. Its mean density is 12.9 g/cm³, 2.34 times Earth's. Among the listed planets, Kepler-328 b has the shortest year, the smallest radius, and the smallest reported mass.

Kepler-328 c is classified as Jupiter-like. It has a radius of 5.4 Earth radii, a mass of 39.4 Earth masses, and an orbital period of 71.3 days. Its mean density is 1.38 g/cm³, 0.25 times Earth's. Among the listed planets, Kepler-328 c has the longest year, the largest radius, and the largest reported mass. Both planets' reported radius and mass estimates are larger than Earth's.