The Kepler-398 System
Kepler-398 is a planetary system in the constellation Lyra hosting 3 confirmed exoplanets, about 579 light-years from Earth.
Size Comparison: The Planets of Kepler-398
Kepler-398: Star and Habitable Zone
Kepler-398
- Surface temperature
- 4,493 K (Sun: 5,772 K)
- Radius
- 0.61 R☉
Habitable zone of Kepler-398: 0.296–0.733 AU (conservative: 0.376–0.695 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-398 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-398 b | Terrestrial | 4.1 d | 0.93 R⊕ | 0.31 | 2014 |
| Kepler-398 c | Terrestrial | 11 d | 1.01 R⊕ | 0.36 | 2014 |
| Kepler-398 d | Terrestrial | 6.8 d | 0.88 R⊕ | 0.33 | 2016 |
Discovery History
The first planet found here, Kepler-398 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-398 d, followed in 2016.
- 2014 — Kepler-398 b (Transit)
- 2014 — Kepler-398 c (Transit)
- 2016 — Kepler-398 d (Transit)
Frequently Asked Questions About Kepler-398
How many planets does Kepler-398 have?
Kepler-398 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-398 system habitable?
None of the known planets in Kepler-398 orbit within the star's habitable zone.
How far away is Kepler-398?
Kepler-398 is about 579 light-years from Earth in the constellation Lyra.
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