TOI-421 b
A confirmed exoplanet orbiting TOI-421.
Compared with Earth
- Size
- About 2.6 times Earth's width.
- Mass
- About 6.7 times Earth's mass.
- Temperature
- About 649 °C (1,200 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 5.2 Earth days.
Planet
- Radius
- 2.64 × Earth
- Mass
- 6.7 × Earth
- Density
- 2.04 g/cm³
- Equilibrium temperature
- 922 K
- Starlight received
- Unknown
- Orbital period
- 5.198 days
- Average distance from its star
- 0.0554 AU
Star
- Host star
- TOI-421
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,291 K
- Radius
- 0.866 × Sun
- Mass
- 0.833 × Sun
- Age
- 10.9 billion years
System
- Distance from Earth
- 244 light-years (74.8 parsecs)
- Stars in system
- 2
- Known planets
- 2
Discovery
- Year
- 2020
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.