TOI-4342

TOI-4342 is a red dwarf star in the constellation Octans located 201 light-years from Earth.

Planetary system
It hosts two planets discovered in 2023. They are locked in a near 2:1 orbital resonance.

TOI-4342 b is a Neptune-like body located 0.05251 AU from its star. Its orbital period around the star is 5.5 days. TOI-4342 b has a radius that is 0.202 that of Jupiter and a mass of 5.76 that of Earth. Its discovery in early 2023 was made through the use of a transit detection method of TOI-4342. The transit method was performed by the Transiting Exoplanet Survey Satellite (TESS). TOI-4342 b was the first of two exoplanets found orbiting TOI-4342. The other planet is TOI-4342 c.

TOI-4342 c is a Neptune-like body located 0.0814 AU from its star. Its orbital period around the star is 10.7 days. TOI-4342 c has a radius that is 0.215 that of Jupiter and a mass of 6.41 that of Earth. Its discovery in early 2023 was made through the use of a transit detection method of TOI-4342. The transit method was performed by the Transiting Exoplanet Survey Satellite (TESS). TOI-4342 b was the first of two exoplanets found orbiting TOI-4342. The other planet is TOI-4342 b.