HD 25463: A Nearby Star With Two Transiting Planets

HD 25463 is a star located 149 light-years from Earth. It is 2.3 billion years old and has a mass of 1.25 solar masses, a radius of 1.42 solar radii, and a temperature of 6350 K. Its mass and radius are larger than the Sun's, and its temperature is hotter than the Sun's. Two planets are known to orbit this host, both discovered by transit in 2023, the same method that reveals their orbital periods through repeated dips in the star's brightness.

HD 25463 b is a Neptune-like planet with a mass of 8.7 Earth masses, a radius of 2.55 Earth radii, and an orbital period of 7.05 days. Its radius and mass are both larger than Earth's, and its mean density is 2.91 g/cm³, 0.528 times Earth's. Among the listed planets, HD 25463 b has the largest radius, the largest reported mass, and the longest year.

HD 25463 c is an Earth-like planet with a mass of 4.3 Earth masses, a radius of 1.36 Earth radii, and an orbital period of 3.04 days. Its radius and mass are larger than Earth's, and its mean density is 9.35 g/cm³, 1.7 times Earth's. Among the listed planets, HD 25463 c has the smallest radius, the smallest reported mass, and the shortest year.