The TOI-201 System: Three Known Worlds Around an F-Type Star

TOI-201 is a star 371 light-years away with three planets orbiting it. The star is an F6 V type, placing it in a hotter spectral class than the Sun, with a reported temperature of 6390 K that is hotter than the Sun's. Its reported mass estimate is 1.32 solar masses and its reported radius estimate is 1.32 solar radii, both larger than the Sun's. Its age is 0.87 billion years.

TOI-201 d is Earth-like, discovered by transit in 2026. Its reported mass estimate is 5.8 Earth masses, and its reported radius estimate is 1.39 Earth radii, larger than Earth's. It completes an orbit in 5.85 days, the shortest year among the listed planets. Its mean density is 11.9 g/cm³, 2.16 times Earth's, and it has the smallest radius and smallest reported mass among the listed planets.

TOI-201 b is Jupiter-like, discovered by transit in 2021. It has a reported mass estimate of 164 Earth masses and a reported radius estimate of 11.4 Earth radii, larger than Earth's. Its orbital period is 53 days, and its mean density is 0.61 g/cm³, 0.111 times Earth's. Among the listed planets, it has the largest radius and the second-smallest reported mass, with the second-shortest year.

TOI-201 c is also Jupiter-like and was discovered in 2025 through Transit Timing Variations. Its reported mass estimate is 4990 Earth masses, roughly 15.7 times Jupiter's mass, and its reported radius estimate is 10.4 Earth radii, larger than Earth's. It orbits in 2890 days, the longest year among the listed planets, and has the second-smallest radius. Its mean density is 24.4 g/cm³, 4.44 times Earth's, and it has the largest reported mass among the listed planets.