Kepler-171 is 2,818 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,642 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-171 b goes round its star every 4.17 days, 21 times as often as Mercury goes round the Sun.
| Surface temperature | 5,642 K |
| Mass | 0.978 solar masses |
| Radius | 0.839 solar radii |
| Luminosity | 0.8334 times the Sun |
| Apparent magnitude | 15.101 |
| Age | about 2.4 billion years |
| Distance from the Sun | 2817.5 light-years (863.8 parsecs) |
| Position (J2000) | RA 296.7719°, Dec 41.7556° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-171 b | 4.17 days | 0.0500 AU | 2.34 R⊕ | 6.08 M⊕ estimated | Transit, 2014 |
| Kepler-171 c | 11.5 days | 0.0980 AU | 2.56 R⊕ | 7.08 M⊕ estimated | Transit, 2014 |
| Kepler-171 d | 39.6 days | 0.223 AU | 1.89 R⊕ | 4.23 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.