The K2-381 System
K2-381 is a planetary system in the constellation Sagittarius hosting 3 confirmed exoplanets, about 475 light-years from Earth.
Size Comparison: The Planets of K2-381
K2-381: Star and Habitable Zone
K2-381
- Surface temperature
- 4,473 K (Sun: 5,772 K)
- Mass
- 0.75 M☉
- Radius
- 0.68 R☉
Habitable zone of K2-381: 0.324–0.801 AU (conservative: 0.410–0.759 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 K2-381 System
Discovery History
The first planet found here, K2-381 b, was discovered in 2022 using the transit method.
Frequently Asked Questions About K2-381
How many planets does K2-381 have?
K2-381 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the K2-381 system habitable?
None of the known planets in K2-381 orbit within the star's habitable zone.
How far away is K2-381?
K2-381 is about 475 light-years from Earth in the constellation Sagittarius.
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