The K2-188 System
K2-188 is a planetary system in the constellation Cancer hosting 2 confirmed exoplanets, about 1,457 light-years from Earth.
Size Comparison: The Planets of K2-188
K2-188: Star and Habitable Zone
K2-188
- Surface temperature
- 5,977 K (Sun: 5,772 K)
- Mass
- 1.06 M☉
- Radius
- 1.19 R☉
Habitable zone of K2-188: 0.944–2.213 AU (conservative: 1.196–2.099 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 K2-188 System
Discovery History
The first planet found here, K2-188 b, was discovered in 2018 using the transit method.
Frequently Asked Questions About K2-188
How many planets does K2-188 have?
K2-188 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the K2-188 system habitable?
None of the known planets in K2-188 orbit within the star's habitable zone.
How far away is K2-188?
K2-188 is about 1,457 light-years from Earth in the constellation Cancer.
Explore the K2-188 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.
