TOI-6383 A b: A Close-Orbiting Giant Around a Cool Dwarf

TOI-6383 A is an M3 host star 559 light-years away. The star's reported mass estimate is 0.458 solar masses, its reported radius estimate is 0.457 solar radii, and its reported temperature is 3440 K. These stellar measurements describe the host star alone rather than the whole stellar system. The star's reported mass and radius estimates are smaller than the Sun's, and its reported temperature is cooler than the Sun's. Its spectral type places it among the small, cool red dwarfs. One planet is known to orbit this host.

TOI-6383 A b is a Jupiter-like planet discovered by transit in 2024. Its reported radius estimate is 11.3 Earth radii, larger than Earth's, and its reported mass estimate is 331 Earth masses, also larger than Earth's. A Jupiter-like classification means its radius exceeds four times Earth's radius. Its mean density is 1.27 g/cm³, 0.23 times Earth's. It completes an orbit in 1.79 days.