The Kepler-446 System
Kepler-446 is a planetary system in the constellation Lyra hosting 3 confirmed exoplanets, about 314 light-years from Earth.
Size Comparison: The Planets of Kepler-446
Kepler-446: Star and Habitable Zone
Kepler-446
- Spectral type
- M4
- Surface temperature
- 3,359 K (Sun: 5,772 K)
- Mass
- 0.22 M☉
- Radius
- 0.24 R☉
Habitable zone of Kepler-446: 0.066–0.174 AU (conservative: 0.084–0.165 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-446 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-446 b | Super Earth | 1.6 d | 1.50 R⊕ | 0.36 | 2015 |
| Kepler-446 c | Terrestrial | 3.0 d | 1.11 R⊕ | 0.47 | 2015 |
| Kepler-446 d | Super Earth | 5.1 d | 1.35 R⊕ | 0.59 | 2015 |
Discovery History
The first planet found here, Kepler-446 b, was discovered in 2015 using the transit method.
- 2015 — Kepler-446 b (Transit)
- 2015 — Kepler-446 c (Transit)
- 2015 — Kepler-446 d (Transit)
Frequently Asked Questions About Kepler-446
How many planets does Kepler-446 have?
Kepler-446 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-446 system habitable?
None of the known planets in Kepler-446 orbit within the star's habitable zone.
How far away is Kepler-446?
Kepler-446 is about 314 light-years from Earth in the constellation Lyra.
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