Kepler-331 is 1,892 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 4,347 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-331 b goes round its star every 8.46 days, 10 times as often as Mercury goes round the Sun.
| Surface temperature | 4,347 K |
| Mass | 0.653 solar masses |
| Radius | 0.492 solar radii |
| Luminosity | 0.1646 times the Sun |
| Apparent magnitude | 16.199 |
| Age | about 1.2 billion years |
| Distance from the Sun | 1892.1 light-years (580.1 parsecs) |
| Position (J2000) | RA 291.8343°, Dec 39.3073° |
| Constellation | Lyra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-331 b | 8.46 days | 0.0650 AU | 1.82 R⊕ | 3.97 M⊕ estimated | Transit, 2014 |
| Kepler-331 c | 17.3 days | 0.105 AU | 1.84 R⊕ | 4.04 M⊕ estimated | Transit, 2014 |
| Kepler-331 d | 32.1 days | 0.159 AU | 1.64 R⊕ | 3.33 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.