CONFIRMED EXOPLANET
·
Sub-Neptune
★ TEMPERATE HABITABLE ZONE
TOI-2257 b
Orbits Host Star: TOI-2257
(Type M3)
· Distance: 188.500 Light-Years (57.791 pc)
Planetary Radius
2.194 R⊕
Planetary Mass
5.450 M⊕
Surface Gravity
1.13 g / g⊕
Equilibrium Temp
256K (-17°C / +1°F)
Orbital Period
35.189 days
Discovery Year
2021 (Transit)
Habitability Assessment
✓ Classified as a Temperate Habitable Zone Candidate.
With an estimated equilibrium temperature of 256 K (-17°C / +1°F) and a radius of 2.194 R⊕, TOI-2257 b falls within the conservative empirical boundary where a solid rocky surface could sustain liquid surface water under suitable atmospheric greenhouse conditions.
Discovery Facility: Transiting Exoplanet Survey Satellite (TESS).
NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS