Two candidate
transiting planets were identified by the
Transiting Exoplanet Survey Satellite. , confirmed in 2021, is a Jupiter-sized planet orbiting with a period of roughly 53 days. (initially called before publication), confirmed in 2023, is a
super-Earth with an orbital period of 5.85 days. TOI-201 b is around 59% as
massive as Jupiter, with a radius 101%
that of Jupiter, giving it a density of . Given the proximity to the host star, its
equilibrium temperature is somewhat high, at . has a radius 1.44 times
that of Earth and a mass about 5.8 times that of Earth, implying a density of roughly . The close proximity to its host star gives it an equilibrium temperature of . A
brown dwarf companion was described in 2025, initially detected through
transit-timing variations of , and later detected by
radial velocity variations, as well as being found to be
transiting the star. This body, named , has a mass 16.5 times
that of Jupiter, a radius 99%
that of Jupiter, and a density of . It is orbiting with a period of , a
semi-major axis of 4.33
astronomical units, and a high
eccentricity of 0.622. It is the only known brown dwarf to be aligned with the host star's inner planetary system. TOI-201 d appears to have formed isolatedly in the inner regions of the primordial gaseous disk, where it acquired a primordial atmosphere that may be no longer present due to
photoevaporation. The two outer bodies may have formed in their current orbits, with forming in a dense, inner disc. Alternatively, the brown dwarf may have formed farther out and migrated inward, pumping its orbital eccentricity due to interactions with the primordial gas disk. Due to the strong
gravitational interactions between the three bodies and non-zero mutual inclinations, their orbits are changing in very short astronomical timescales. Within 200 years, the transiting nature of the three bodies will be over, then re-appearing after 10,000 years. ==References==