K2-384: A Cool Red Dwarf and Its Five Known Planets

K2-384 is an M4 V star, a small, cool red dwarf, located 270 light-years away. Its reported mass estimate is 0.33 solar masses, its reported radius estimate is 0.348 solar radii, and its temperature is 3620 K. Each of these estimates is smaller or cooler than the corresponding value for the Sun. Five planets are known to orbit this star.

All five planets were discovered by transit in 2022. K2-384 b, K2-384 c, K2-384 d, and K2-384 e are classified as Earth-like, while K2-384 f is a Super-Earth. Every planet's reported radius estimate is larger than Earth's. Among the listed planets, K2-384 b has the smallest radius at 1.08 Earth radii and the shortest year, an orbital period of 2.23 days. K2-384 c has the second-smallest radius, 1.19 Earth radii, and the second-shortest year, 4.19 days. K2-384 d has the second-largest radius, 1.39 Earth radii, and an orbital period of 6.68 days. K2-384 e has a radius of 1.35 Earth radii and the second-longest year, 9.72 days. K2-384 f has the largest radius at 2.22 Earth radii and the longest year, an orbital period of 13.6 days.