T Tauri star
The planet orbits a (K-type) T Tauri star named TW Hydrae. The star has a mass of 0.8 and a radius of 1.1 . It has a temperature of 4000 K and is about 9 million years old. In comparison, the Sun is 4.6 billion years old and has a temperature of 5778 K. Its luminosity () is 28% of that of the Sun.