TOI-663 b
A confirmed exoplanet orbiting TOI-663.
Compared with Earth
- Size
- About 2.3 times Earth's width.
- Mass
- About 4.5 times Earth's mass.
- Temperature
- About 401 °C (754 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 49 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 2.6 Earth days.
Planet
- Radius
- 2.27 × Earth
- Mass
- 4.45 × Earth
- Density
- 2.07 g/cm³
- Equilibrium temperature
- 674 K
- Starlight received
- 49.1 × Earth
- Orbital period
- 2.599 days
- Average distance from its star
- 0.0295 AU
Star
- Host star
- TOI-663
- Spectral class
- M — red dwarf
- Surface temperature
- 3,681 K
- Radius
- 0.512 × Sun
- Mass
- 0.514 × Sun
- Age
- Unknown
System
- Distance from Earth
- 209.5 light-years (64.23 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2024
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.