K2-239 is 101 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this M3.0 V star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-239 b goes round its star every 5.24 days, 17 times as often as Mercury goes round the Sun.
| Spectral type | M3.0 V |
| Surface temperature | 3,420 K |
| Mass | 0.4 solar masses |
| Radius | 0.36 solar radii |
| Luminosity | 0.016 times the Sun |
| Apparent magnitude | 14.632 |
| Distance from the Sun | 101.4 light-years (31.1 parsecs) |
| Position (J2000) | RA 160.5941°, Dec 4.4414° |
| Constellation | Sextans |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-239 b | 5.24 days | 0.0441 AU | 1.1 R⊕ | 1.37 M⊕ estimated | Transit, 2018 |
| K2-239 c | 7.78 days | 0.0576 AU | 1 R⊕ | 0.972 M⊕ estimated | Transit, 2018 |
| K2-239 d | 10.1 days | 0.0685 AU | 1.1 R⊕ | 1.37 M⊕ estimated | Transit, 2018 |
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.