The Kepler-255 System
Kepler-255 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 3,433 light-years from Earth.
Size Comparison: The Planets of Kepler-255
Kepler-255: Star and Habitable Zone
Kepler-255
- Surface temperature
- 5,431 K (Sun: 5,772 K)
- Mass
- 0.90 M☉
- Radius
- 0.86 R☉
- Age
- 4.4 billion years (Sun: 4.6)
Habitable zone of Kepler-255: 0.582–1.385 AU (conservative: 0.737–1.313 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-255 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-255 b | Super Earth | 5.7 d | 1.55 R⊕ | 0.28 | 2014 |
| Kepler-255 c | Mini Neptune | 9.9 d | 2.99 R⊕ | 0.23 | 2014 |
| Kepler-255 d | Super Earth | 1.0 d | 1.32 R⊕ | 0.29 | 2016 |
Discovery History
The first planet found here, Kepler-255 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-255 d, followed in 2016.
- 2014 — Kepler-255 b (Transit)
- 2014 — Kepler-255 c (Transit)
- 2016 — Kepler-255 d (Transit)
Frequently Asked Questions About Kepler-255
How many planets does Kepler-255 have?
Kepler-255 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-255 system habitable?
None of the known planets in Kepler-255 orbit within the star's habitable zone.
How far away is Kepler-255?
Kepler-255 is about 3,433 light-years from Earth in the constellation Cygnus.
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