TOI-270, also known as L 231-32, is a red dwarf star 73.3 light-years (22.5 parsecs) away in the constellation Pictor.
[4] Their masses have since been measured by both Doppler spectroscopy[5] and transit-timing variations.
[4] Observations of the outermost planet, TOI-270 d, by the Hubble Space Telescope suggest a hydrogen-rich atmosphere with signs of water vapor.
[7] TOI-270 c & d are good targets for atmospheric detection with the James Webb Space Telescope.
[9] Possible signatures of sulfur dioxide (SO2) and carbon disulfide (CS2) were also found.