The Kepler-23 System
Kepler-23 is a planetary system in the constellation Cygnus hosting 3 confirmed exoplanets, about 2,726 light-years from Earth.
Size Comparison: The Planets of Kepler-23
Kepler-23: Star and Habitable Zone
Kepler-23
- Surface temperature
- 5,828 K (Sun: 5,772 K)
- Mass
- 1.08 M☉
- Radius
- 1.55 R☉
Habitable zone of Kepler-23: 1.178–2.773 AU (conservative: 1.493–2.629 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-23 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-23 b | Super Earth | 7.1 d | 1.64 R⊕ | 0.26 | 2011 |
| Kepler-23 c | Sub Neptune | 11 d | 3.01 R⊕ | 0.21 | 2011 |
| Kepler-23 d | Mini Neptune | 15 d | 2.21 R⊕ | 0.25 | 2014 |
Discovery History
The first planet found here, Kepler-23 b, was discovered in 2011 using the transit method. The most recent addition, Kepler-23 d, followed in 2014.
- 2011 — Kepler-23 b (Transit)
- 2011 — Kepler-23 c (Transit)
- 2014 — Kepler-23 d (Transit)
Frequently Asked Questions About Kepler-23
How many planets does Kepler-23 have?
Kepler-23 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-23 system habitable?
None of the known planets in Kepler-23 orbit within the star's habitable zone.
How far away is Kepler-23?
Kepler-23 is about 2,726 light-years from Earth in the constellation Cygnus.
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