The Kepler-222 System
Kepler-222 is a planetary system in the constellation Lyra hosting 3 confirmed exoplanets, about 2,475 light-years from Earth.
Size Comparison: The Planets of Kepler-222
Kepler-222: Star and Habitable Zone
Kepler-222
- Surface temperature
- 5,433 K (Sun: 5,772 K)
- Radius
- 0.87 R☉
Habitable zone of Kepler-222: 0.588–1.400 AU (conservative: 0.745–1.328 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-222 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-222 b | Sub Neptune | 3.9 d | 3.16 R⊕ | 0.21 | 2014 |
| Kepler-222 c | Neptune-like | 10 d | 4.64 R⊕ | 0.18 | 2014 |
| Kepler-222 d | Sub Neptune | 28 d | 3.69 R⊕ | 0.26 | 2014 |
Discovery History
The first planet found here, Kepler-222 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-222 b (Transit)
- 2014 — Kepler-222 c (Transit)
- 2014 — Kepler-222 d (Transit)
Frequently Asked Questions About Kepler-222
How many planets does Kepler-222 have?
Kepler-222 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-222 system habitable?
None of the known planets in Kepler-222 orbit within the star's habitable zone.
How far away is Kepler-222?
Kepler-222 is about 2,475 light-years from Earth in the constellation Lyra.
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