The TOI-199 System
TOI-199 is a planetary system in the constellation Dorado hosting 2 confirmed exoplanets, about 334 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
Size Comparison: The Planets of TOI-199
Planets without a measured radius are not shown.
TOI-199: Star and Habitable Zone
TOI-199
- Spectral type
- G9 V
- Surface temperature
- 5,255 K (Sun: 5,772 K)
- Mass
- 0.94 M☉
- Radius
- 0.82 R☉
- Luminosity
- 0.4590 L☉
- Age
- 0.8 billion years (Sun: 4.6)
Habitable zone of TOI-199: 0.524–1.254 AU (conservative: 0.664–1.189 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 2 Planets in the TOI-199 System
Discovery History
The first planet found here, TOI-199 b, was discovered in 2023 using the transit method.
Frequently Asked Questions About TOI-199
How many planets does TOI-199 have?
TOI-199 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the TOI-199 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is TOI-199?
TOI-199 is about 334 light-years from Earth in the constellation Dorado.
Explore the TOI-199 system in the app
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