The Kepler-1666 System
Kepler-1666 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets, about 4,499 light-years from Earth.
Size Comparison: The Planets of Kepler-1666
Kepler-1666: Star and Habitable Zone
Kepler-1666
- Surface temperature
- 6,293 K (Sun: 5,772 K)
- Mass
- 1.23 M☉
- Radius
- 1.15 R☉
- Luminosity
- 1.8552 L☉
Habitable zone of Kepler-1666: 0.991–2.307 AU (conservative: 1.255–2.188 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-1666 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| Kepler-1666 b | Mini Neptune | 26 d | 2.88 R⊕ | 0.24 | 2020 |
| Kepler-1666 c | Sub Neptune | 41 d | 3.24 R⊕ | 0.24 | 2020 |
Discovery History
The first planet found here, Kepler-1666 b, was discovered in 2020 using the transit method.
- 2020 — Kepler-1666 b (Transit)
- 2020 — Kepler-1666 c (Transit)
Frequently Asked Questions About Kepler-1666
How many planets does Kepler-1666 have?
Kepler-1666 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the Kepler-1666 system habitable?
None of the known planets in Kepler-1666 orbit within the star's habitable zone.
How far away is Kepler-1666?
Kepler-1666 is about 4,499 light-years from Earth in the constellation Cygnus.
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