Kepler-1666 is 4,499 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 6,293 K star; the first was found in 2020 by transit (Kepler).
Fly there in 3DKepler-1666 b goes round its star every 25.8 days, 3 times as often as Mercury goes round the Sun.
| Surface temperature | 6,293 K |
| Mass | 1.23 solar masses |
| Radius | 1.14586 solar radii |
| Luminosity | 1.855 times the Sun |
| Apparent magnitude | 15.104 |
| Age | about 0.41 billion years |
| Distance from the Sun | 4498.9 light-years (1379.4 parsecs) |
| Position (J2000) | RA 297.9516°, Dec 46.2647° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-1666 b | 25.8 days | 0.176 AU | 2.8827 R⊕ | 8.66 M⊕ estimated | Transit, 2020 |
| Kepler-1666 c | 40.7 days | 0.238 AU | 3.2356 R⊕ | 10.5 M⊕ estimated | Transit, 2020 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.
For a star of 6,293 K, 1.9 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.25 to 2.19 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 4,499 years ago, around 2500 BC.