TOI-1386 and Its Two Known Planets

TOI-1386 is a Sun-like star with a spectral type of G5V. It lies 479 light-years away and has a mass of 1.04 solar masses, a radius of 1.01 solar radii, a temperature of 5790 K, and an age of 3.3 billion years. Two planets are known to orbit this star.

TOI-1386 b is a Jupiter-like planet discovered by the transit method in 2024. Its radius is 6.22 Earth radii, which is larger than Earth's. Its mass is 45.8 Earth masses, also larger than Earth's, and its mean density is 1.05 g/cm³, 0.191 times Earth's. Among the listed planets, it has the shortest year by reported estimates, at 25.8 days.

TOI-1386 c was discovered by the radial velocity method in 2024. This technique measures the wobble a planet's gravity induces in its star's motion, and repeated wobbles reveal the planet and its orbital period. Its minimum mass is 75.2 Earth masses, meaning its true mass is at least this value, and is larger than Earth's. Its orbital period is 232 days, the longest year among the listed planets by reported estimates.