The Kepler-217 System
Kepler-217 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 3,603 light-years from Earth.
Size Comparison: The Planets of Kepler-217
Kepler-217: Star and Habitable Zone
Kepler-217
- Surface temperature
- 6,171 K (Sun: 5,772 K)
- Radius
- 1.80 R☉
Habitable zone of Kepler-217: 1.504–3.510 AU (conservative: 1.904–3.328 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-217 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-217 b | Mini Neptune | 5.4 d | 2.23 R⊕ | 0.24 | 2014 |
| Kepler-217 c | Super Earth | 8.6 d | 1.85 R⊕ | 0.26 | 2014 |
| Kepler-217 d | Super Earth | 3.9 d | 1.32 R⊕ | 0.29 | 2016 |
Discovery History
The first planet found here, Kepler-217 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-217 d, followed in 2016.
- 2014 — Kepler-217 b (Transit)
- 2014 — Kepler-217 c (Transit)
- 2016 — Kepler-217 d (Transit)
Frequently Asked Questions About Kepler-217
How many planets does Kepler-217 have?
Kepler-217 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-217 system habitable?
None of the known planets in Kepler-217 orbit within the star's habitable zone.
How far away is Kepler-217?
Kepler-217 is about 3,603 light-years from Earth in the constellation Cygnus.
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