The TOI-789 System
TOI-789 is a planetary system in the constellation Volans hosting 3 confirmed exoplanets, about 142 light-years from Earth.
Size Comparison: The Planets of TOI-789
TOI-789: Star and Habitable Zone
TOI-789
- Spectral type
- M3 V
- Surface temperature
- 3,471 K (Sun: 5,772 K)
- Mass
- 0.36 M☉
- Radius
- 0.37 R☉
Habitable zone of TOI-789: 0.110–0.285 AU (conservative: 0.139–0.270 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-789 System
Discovery History
The first planet found here, TOI-789 b, was discovered in 2026 using the transit method.
Frequently Asked Questions About TOI-789
How many planets does TOI-789 have?
TOI-789 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the TOI-789 system habitable?
None of the known planets in TOI-789 orbit within the star's habitable zone.
How far away is TOI-789?
TOI-789 is about 142 light-years from Earth in the constellation Volans.
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