The Kepler-191 System
Kepler-191 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 1,939 light-years from Earth.
Size Comparison: The Planets of Kepler-191
Kepler-191: Star and Habitable Zone
Kepler-191
- Surface temperature
- 5,282 K (Sun: 5,772 K)
- Radius
- 0.79 R☉
Habitable zone of Kepler-191: 0.509–1.218 AU (conservative: 0.645–1.155 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 Kepler-191 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-191 b | Super Earth | 9.9 d | 1.34 R⊕ | 0.31 | 2014 |
| Kepler-191 c | Super Earth | 18 d | 1.86 R⊕ | 0.32 | 2014 |
| Kepler-191 d | Mini Neptune | 5.9 d | 2.28 R⊕ | 0.25 | 2016 |
Discovery History
The first planet found here, Kepler-191 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-191 d, followed in 2016.
- 2014 — Kepler-191 b (Transit)
- 2014 — Kepler-191 c (Transit)
- 2016 — Kepler-191 d (Transit)
Frequently Asked Questions About Kepler-191
How many planets does Kepler-191 have?
Kepler-191 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-191 system habitable?
None of the known planets in Kepler-191 orbit within the star's habitable zone.
How far away is Kepler-191?
Kepler-191 is about 1,939 light-years from Earth in the constellation Cygnus.
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