The Kepler-397 System
2 planets
Cygnus
Kepler-397 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets.
Size Comparison: The Planets of Kepler-397
Kepler-397: Star and Habitable Zone
Kepler-397
- Surface temperature
- 5,307 K (Sun: 5,772 K)
- Radius
- 0.77 R☉
Too hot
Optimistic habitable zone
Conservative habitable zone
Too cold
Habitable zone of Kepler-397: 0.499–1.193 AU (conservative: 0.632–1.131 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-397 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-397 b | Mini Neptune | 22 d | 2.46 R⊕ | 0.29 | 2014 |
| Kepler-397 c | Cold Gas Giant | 135 d | 6.18 R⊕ | 0.45 | 2014 |
Discovery History
The first planet found here, Kepler-397 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-397 b (Transit)
- 2014 — Kepler-397 c (Transit)
Frequently Asked Questions About Kepler-397
How many planets does Kepler-397 have?
Kepler-397 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-397 system habitable?
None of the known planets in Kepler-397 orbit within the star's habitable zone.
Explore the Kepler-397 system in the app
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