TOI-4666 b
A confirmed exoplanet orbiting TOI-4666.
Compared with Earth
- Size
- About 13 times Earth's width.
- Mass
- About 155 times Earth's mass.
- Temperature
- About 422 °C (791 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 56 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 2.9 Earth days.
Planet
- Radius
- 12.53 × Earth
- Mass
- 155.4 × Earth
- Density
- 0.43 g/cm³
- Equilibrium temperature
- 695 K
- Starlight received
- 55.6 × Earth
- Orbital period
- 2.909 days
- Average distance from its star
- 0.034 AU
Star
- Host star
- TOI-4666
- Spectral class
- M — red dwarf
- Surface temperature
- 3,793 K
- Radius
- 0.585 × Sun
- Mass
- 0.576 × Sun
- Age
- 3 billion years
System
- Distance from Earth
- 504.7 light-years (154.7 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2025
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.