The Kepler-304 System
Kepler-304 is a planetary system in the constellation Cygnus hosting 4 confirmed exoplanets, about 1,418 light-years from Earth.
Size Comparison: The Planets of Kepler-304
Kepler-304: Star and Habitable Zone
Kepler-304
- Surface temperature
- 4,731 K (Sun: 5,772 K)
- Radius
- 0.69 R☉
Habitable zone of Kepler-304: 0.365–0.893 AU (conservative: 0.462–0.846 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 4 Planets in the Kepler-304 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-304 b | Mini Neptune | 3.3 d | 2.86 R⊕ | 0.22 | 2014 |
| Kepler-304 c | Mini Neptune | 5.3 d | 2.17 R⊕ | 0.26 | 2014 |
| Kepler-304 d | Mini Neptune | 9.7 d | 2.75 R⊕ | 0.26 | 2014 |
| Kepler-304 e | Terrestrial | 1.5 d | 1.20 R⊕ | 0.29 | 2016 |
Discovery History
The first planet found here, Kepler-304 b, was discovered in 2014 using the transit method. The most recent addition, Kepler-304 e, followed in 2016.
- 2014 — Kepler-304 b (Transit)
- 2014 — Kepler-304 c (Transit)
- 2014 — Kepler-304 d (Transit)
- 2016 — Kepler-304 e (Transit)
Frequently Asked Questions About Kepler-304
How many planets does Kepler-304 have?
Kepler-304 has 4 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-304 system habitable?
None of the known planets in Kepler-304 orbit within the star's habitable zone.
How far away is Kepler-304?
Kepler-304 is about 1,418 light-years from Earth in the constellation Cygnus.
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