The TOI-663 System
TOI-663 is a planetary system in the constellation Sextans hosting 3 confirmed exoplanets, about 210 light-years from Earth.
Size Comparison: The Planets of TOI-663
TOI-663: Star and Habitable Zone
TOI-663
- Spectral type
- M1 V
- Surface temperature
- 3,681 K (Sun: 5,772 K)
- Mass
- 0.51 M☉
- Radius
- 0.51 R☉
Habitable zone of TOI-663: 0.170–0.436 AU (conservative: 0.215–0.413 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 3 Planets in the TOI-663 System
Discovery History
The first planet found here, TOI-663 b, was discovered in 2024 using the transit method.
Frequently Asked Questions About TOI-663
How many planets does TOI-663 have?
TOI-663 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the TOI-663 system habitable?
None of the known planets in TOI-663 orbit within the star's habitable zone.
How far away is TOI-663?
TOI-663 is about 210 light-years from Earth in the constellation Sextans.
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