L 98-59: A Nearby Red Dwarf and Its Five Known Planets

L 98-59 is an M3 V star - a small, cool red dwarf - located 34.6 light-years away. Five planets are known to orbit it. The star's mass is 0.292 solar masses, which is smaller than the Sun's, and its radius is 0.316 solar radii, also smaller than the Sun's. Its temperature is 3420 K, cooler than the Sun's, and its age is 4.94 billion years.

L 98-59 b is a Sub-Earth, meaning its radius is smaller than Earth's. Its radius is 0.837 Earth radii and its mass is 0.46 Earth masses, both smaller than Earth's. Its mean density is 4.32 g/cm³, 0.784 times Earth's. It orbits in 2.25 days.

L 98-59 c is classified as Earth-like. Its radius is 1.33 Earth radii and its mass is 2 Earth masses, both larger than Earth's. Its mean density is 4.69 g/cm³, 0.852 times Earth's. It completes an orbit in 3.69 days.

L 98-59 d is a Super-Earth, with a radius of 1.63 Earth radii and a mass of 1.64 Earth masses, both larger than Earth's. Its mean density is 2.1 g/cm³, 0.381 times Earth's. Its orbital period is 7.45 days.

L 98-59 e and L 98-59 f were both detected by radial velocity. L 98-59 e has a minimum mass of 2.82 Earth masses, a lower bound on its true mass, and orbits in 12.8 days. L 98-59 f has a minimum mass of 2.8 Earth masses, also a lower bound, and a longer orbital period of 23.1 days.

Among the listed planets, L 98-59 b has the shortest year by reported estimates, at 2.25 days. L 98-59 f's minimum mass is larger than Earth's, and its year is the longest among the listed planets at 23.1 days.