The Kepler-218 System
Kepler-218 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 2,141 light-years from Earth.
Size Comparison: The Planets of Kepler-218
Kepler-218: Star and Habitable Zone
Kepler-218
- Surface temperature
- 5,502 K (Sun: 5,772 K)
- Radius
- 1.06 R☉
Habitable zone of Kepler-218: 0.735–1.746 AU (conservative: 0.931–1.655 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-218 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-218 b | Super Earth | 3.6 d | 1.48 R⊕ | 0.28 | 2014 |
| Kepler-218 c | Sub Neptune | 45 d | 3.14 R⊕ | 0.27 | 2014 |
| Kepler-218 d | Mini Neptune | 125 d | 2.66 R⊕ | 0.45 | 2016 |
Discovery History
The first planet found here, Kepler-218 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-218 d, followed in 2016.
- 2014 — Kepler-218 b (Transit)
- 2014 — Kepler-218 c (Transit)
- 2016 — Kepler-218 d (Transit)
Frequently Asked Questions About Kepler-218
How many planets does Kepler-218 have?
Kepler-218 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-218 system habitable?
None of the known planets in Kepler-218 orbit within the star's habitable zone.
How far away is Kepler-218?
Kepler-218 is about 2,141 light-years from Earth in the constellation Cygnus.
Explore the Kepler-218 system in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
