Kepler-231 is 1,033 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M1 V star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-231 b goes round its star every 10.1 days, 9 times as often as Mercury goes round the Sun.
| Spectral type | M1 V |
| Surface temperature | 3,767 K |
| Mass | 0.58 solar masses |
| Radius | 0.49 solar radii |
| Luminosity | 0.092 times the Sun |
| Apparent magnitude | 15.813 |
| Age | about 3.15 billion years |
| Distance from the Sun | 1032.7 light-years (316.6 parsecs) |
| Position (J2000) | RA 293.9734°, Dec 50.5318° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-231 b | 10.1 days | 0.0740 AU | 1.73 R⊕ | 35.4 M⊕ | Transit, 2014 |
| Kepler-231 c | 19.3 days | 0.114 AU | 1.93 R⊕ | 24.1 M⊕ | 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.