The Kepler-203 System
Kepler-203 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 2,294 light-years from Earth.
Size Comparison: The Planets of Kepler-203
Kepler-203: Star and Habitable Zone
Kepler-203
- Surface temperature
- 5,821 K (Sun: 5,772 K)
- Radius
- 1.11 R☉
Habitable zone of Kepler-203: 0.846–1.992 AU (conservative: 1.072–1.888 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-203 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-203 b | Mini Neptune | 3.2 d | 2.57 R⊕ | 0.23 | 2014 |
| Kepler-203 c | Mini Neptune | 5.4 d | 2.47 R⊕ | 0.24 | 2014 |
| Kepler-203 d | Super Earth | 11 d | 1.44 R⊕ | 0.29 | 2014 |
Discovery History
The first planet found here, Kepler-203 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-203 b (Transit)
- 2014 — Kepler-203 c (Transit)
- 2014 — Kepler-203 d (Transit)
Frequently Asked Questions About Kepler-203
How many planets does Kepler-203 have?
Kepler-203 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-203 system habitable?
None of the known planets in Kepler-203 orbit within the star's habitable zone.
How far away is Kepler-203?
Kepler-203 is about 2,294 light-years from Earth in the constellation Cygnus.
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