The Kepler-28 System
Kepler-28 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets, about 1,430 light-years from Earth.
Size Comparison: The Planets of Kepler-28
Kepler-28: Star and Habitable Zone
Kepler-28
- Surface temperature
- 4,499 K (Sun: 5,772 K)
- Mass
- 0.68 M☉
- Radius
- 0.66 R☉
Habitable zone of Kepler-28: 0.322–0.796 AU (conservative: 0.408–0.754 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-28 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-28 b | Mini Neptune | 5.9 d | 1.96 R⊕ | 0.21 | 2011 |
| Kepler-28 c | Mini Neptune | 9.0 d | 1.86 R⊕ | 0.24 | 2011 |
Discovery History
The first planet found here, Kepler-28 b, was discovered in 2011 using the transit method.
- 2011 — Kepler-28 b (Transit)
- 2011 — Kepler-28 c (Transit)
Frequently Asked Questions About Kepler-28
How many planets does Kepler-28 have?
Kepler-28 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-28 system habitable?
None of the known planets in Kepler-28 orbit within the star's habitable zone.
How far away is Kepler-28?
Kepler-28 is about 1,430 light-years from Earth in the constellation Cygnus.
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