TOI-2093: A Cool Dwarf with Two Known Worlds

TOI-2093 is a K5 V star, a cooler and redder type than the Sun, located 270 light-years away. Its spectral class places it among the K-type dwarfs, which are less massive and less luminous than G-type stars like the Sun. The star's reported mass is 0.745 solar masses and its radius is 0.729 solar radii, both smaller than the Sun's corresponding values, while its temperature of 4430 K is cooler than the Sun's. It is estimated to be 6.6 billion years old. Two planets orbit this host.

TOI-2093 b was discovered in 2025 by the radial velocity method, which detects the gravitational wobble a planet induces in its star's motion. It has a minimum mass of 10.6 Earth masses - a lower bound on its true mass - and an orbital period of 12.8 days, the shortest among the listed planets.

TOI-2093 c was also discovered in 2025, but by the transit method, which registers the small dip in starlight when a planet crosses in front of its star. Classified as a Super-Earth, it has a radius of 2.3 Earth radii, larger than Earth's, and a mass of 15.8 Earth masses, also larger than Earth's. Its mean density is 7.16 g/cm³, 1.3 times Earth's. TOI-2093 c completes an orbit every 53.8 days, the longest among the listed planets.