The Kepler-209 System
Kepler-209 is a planetary system in the constellation Lyra hosting 2 confirmed exoplanets, about 1,882 light-years from Earth.
Size Comparison: The Planets of Kepler-209
Kepler-209: Star and Habitable Zone
Kepler-209
- Surface temperature
- 5,513 K (Sun: 5,772 K)
- Radius
- 0.94 R☉
Habitable zone of Kepler-209: 0.649–1.540 AU (conservative: 0.822–1.460 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 2 Planets in the Kepler-209 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-209 b | Mini Neptune | 16 d | 2.26 R⊕ | 0.27 | 2014 |
| Kepler-209 c | Sub Neptune | 42 d | 3.10 R⊕ | 0.29 | 2014 |
Discovery History
The first planet found here, Kepler-209 b, was discovered in 2014 using the transit method.
- 2014 — Kepler-209 b (Transit)
- 2014 — Kepler-209 c (Transit)
Frequently Asked Questions About Kepler-209
How many planets does Kepler-209 have?
Kepler-209 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-209 system habitable?
None of the known planets in Kepler-209 orbit within the star's habitable zone.
How far away is Kepler-209?
Kepler-209 is about 1,882 light-years from Earth in the constellation Lyra.
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