The TOI-421 System
TOI-421 is a planetary system in the constellation Lepus hosting 2 confirmed exoplanets around 2 stars, about 244 light-years from Earth.
Size Comparison: The Planets of TOI-421
Star TOI-421 and Its Habitable Zone
TOI-421
- Spectral type
- G9 V
- Surface temperature
- 5,291 K (Sun: 5,772 K)
- Mass
- 0.83 M☉
- Radius
- 0.87 R☉
- Age
- 10.9 billion years (Sun: 4.6)
Habitable zone of TOI-421: 0.560–1.340 AU (conservative: 0.710–1.271 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-421 System
Discovery History
The first planet found here, TOI-421 b, was discovered in 2020 using the transit method.
Frequently Asked Questions About TOI-421
How many planets does TOI-421 have?
TOI-421 has 2 confirmed exoplanets distributed around its 2 stars. More may await discovery.
Are any planets in the TOI-421 system habitable?
None of the known planets in TOI-421 orbit within the star's habitable zone.
How far away is TOI-421?
TOI-421 is about 244 light-years from Earth in the constellation Lepus.
Explore the TOI-421 system in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
