The Kepler-444 System
Kepler-444 is a planetary system in the constellation Lyra hosting 5 confirmed exoplanets around 3 stars, about 119 light-years from Earth.
Size Comparison: The Planets of Kepler-444
Star Kepler-444 and Its Habitable Zone
Kepler-444
- Spectral type
- K
- Surface temperature
- 5,046 K (Sun: 5,772 K)
- Mass
- 0.76 M☉
- Radius
- 0.75 R☉
- Age
- 11.2 billion years (Sun: 4.6)
Habitable zone of Kepler-444: 0.448–1.082 AU (conservative: 0.568–1.026 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 5 Planets in the Kepler-444 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-444 b | Terrestrial | 3.6 d | 0.40 R⊕ | 0.24 | 2015 |
| Kepler-444 c | Terrestrial | 4.5 d | 0.50 R⊕ | 0.26 | 2015 |
| Kepler-444 d | Terrestrial | 6.2 d | 0.53 R⊕ | 0.27 | 2015 |
| Kepler-444 e | Terrestrial | 7.7 d | 0.55 R⊕ | 0.28 | 2015 |
| Kepler-444 f | Terrestrial | 9.7 d | 0.74 R⊕ | 0.31 | 2015 |
Discovery History
The first planet found here, Kepler-444 b, was discovered in 2015 using the transit method.
- 2015 — Kepler-444 b (Transit)
- 2015 — Kepler-444 c (Transit)
- 2015 — Kepler-444 d (Transit)
- 2015 — Kepler-444 e (Transit)
- 2015 — Kepler-444 f (Transit)
Frequently Asked Questions About Kepler-444
How many planets does Kepler-444 have?
Kepler-444 has 5 confirmed exoplanets distributed around its 3 stars. More may await discovery.
Are any planets in the Kepler-444 system habitable?
None of the known planets in Kepler-444 orbit within the star's habitable zone.
How far away is Kepler-444?
Kepler-444 is about 119 light-years from Earth in the constellation Lyra.
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