The Kepler-308 System
Kepler-308 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets, about 4,357 light-years from Earth.
Size Comparison: The Planets of Kepler-308
Kepler-308: Star and Habitable Zone
Kepler-308
- Surface temperature
- 5,895 K (Sun: 5,772 K)
- Radius
- 0.94 R☉
Habitable zone of Kepler-308: 0.730–1.714 AU (conservative: 0.924–1.625 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 Kepler-308 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-308 b | Mini Neptune | 9.7 d | 2.12 R⊕ | 0.26 | 2014 |
| Kepler-308 c | Mini Neptune | 15 d | 2.16 R⊕ | 0.27 | 2014 |
Discovery History
The first planet found here, Kepler-308 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-308 b (Transit)
- 2014 — Kepler-308 c (Transit)
Frequently Asked Questions About Kepler-308
How many planets does Kepler-308 have?
Kepler-308 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-308 system habitable?
None of the known planets in Kepler-308 orbit within the star's habitable zone.
How far away is Kepler-308?
Kepler-308 is about 4,357 light-years from Earth in the constellation Cygnus.
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