TOI-2257 b
A confirmed exoplanet orbiting TOI-2257.
Compared with Earth
- Size
- About 2.2 times Earth's width.
- Temperature
- About -17 °C (1 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 35 Earth days.
Planet
- Radius
- 2.194 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 256 K
- Starlight received
- Unknown
- Orbital period
- 35.19 days
- Average distance from its star
- 0.145 AU
Star
- Host star
- TOI-2257
- Spectral class
- M — red dwarf
- Surface temperature
- 3,430 K
- Radius
- 0.313 × Sun
- Mass
- 0.328 × Sun
- Age
- Unknown
System
- Distance from Earth
- 188.5 light-years (57.79 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2021
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.