The Kepler-228 System
Kepler-228 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 5,364 light-years from Earth.
Size Comparison: The Planets of Kepler-228
Kepler-228: Star and Habitable Zone
Kepler-228
- Surface temperature
- 6,043 K (Sun: 5,772 K)
- Radius
- 1.01 R☉
Habitable zone of Kepler-228: 0.819–1.917 AU (conservative: 1.037–1.818 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-228 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-228 b | Super Earth | 2.6 d | 1.53 R⊕ | 0.28 | 2014 |
| Kepler-228 c | Mini Neptune | 4.1 d | 2.70 R⊕ | 0.22 | 2014 |
| Kepler-228 d | Neptune-like | 11 d | 4.04 R⊕ | 0.18 | 2014 |
Discovery History
The first planet found here, Kepler-228 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-228 b (Transit)
- 2014 — Kepler-228 c (Transit)
- 2014 — Kepler-228 d (Transit)
Frequently Asked Questions About Kepler-228
How many planets does Kepler-228 have?
Kepler-228 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-228 system habitable?
None of the known planets in Kepler-228 orbit within the star's habitable zone.
How far away is Kepler-228?
Kepler-228 is about 5,364 light-years from Earth in the constellation Cygnus.
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