Kepler-239 is 2,114 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 4,914 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-239 b goes round its star every 11.8 days, 7 times as often as Mercury goes round the Sun.
| Surface temperature | 4,914 K |
| Mass | 0.757 solar masses |
| Radius | 0.763 solar radii |
| Luminosity | 0.3351 times the Sun |
| Apparent magnitude | 15.252 |
| Age | about 3.31 billion years |
| Distance from the Sun | 2113.8 light-years (648.1 parsecs) |
| Position (J2000) | RA 294.2021°, Dec 40.6633° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-239 b | 11.8 days | 0.0950 AU | 2.33 R⊕ | 6.04 M⊕ estimated | Transit, 2014 |
| Kepler-239 c | 56.2 days | 0.268 AU | 2.51 R⊕ | 6.85 M⊕ estimated | Transit, 2014 |
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 4,914 K, 0.34 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.58 to 1.05 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 2,114 years ago, around 100 BC.