The K2-398 System
K2-398 is a planetary system in the constellation Sextans hosting 2 confirmed exoplanets, about 1,980 light-years from Earth.
Size Comparison: The Planets of K2-398
K2-398: Star and Habitable Zone
K2-398
- Surface temperature
- 5,946 K (Sun: 5,772 K)
- Mass
- 0.95 M☉
- Radius
- 1.24 R☉
Habitable zone of K2-398: 0.975–2.287 AU (conservative: 1.235–2.168 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 K2-398 System
Discovery History
The first planet found here, K2-398 b, was discovered in 2022 using the transit method.
Frequently Asked Questions About K2-398
How many planets does K2-398 have?
K2-398 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the K2-398 system habitable?
None of the known planets in K2-398 orbit within the star's habitable zone.
How far away is K2-398?
K2-398 is about 1,980 light-years from Earth in the constellation Sextans.
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