Kepler-191 is 1,939 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,282 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-191 d goes round its star every 5.95 days, 15 times as often as Mercury goes round the Sun.
| Surface temperature | 5,282 K |
| Mass | 0.857 solar masses |
| Radius | 0.789 solar radii |
| Luminosity | 0.385 times the Sun |
| Apparent magnitude | 14.987 |
| Age | about 1 billion years |
| Distance from the Sun | 1938.9 light-years (594.5 parsecs) |
| Position (J2000) | RA 291.1833°, Dec 45.3231° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-191 d | 5.95 days | 0.0610 AU | 2.28 R⊕ | 5.82 M⊕ estimated | Transit, 2016 |
| Kepler-191 b | 9.94 days | 0.0870 AU | 1.34 R⊕ | 2.36 M⊕ estimated | Transit, 2014 |
| Kepler-191 c | 17.7 days | 0.128 AU | 1.86 R⊕ | 4.12 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 5,282 K, 0.39 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.61 to 1.09 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 1,939 years ago, around AD 90.