K2-155 is 237 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this K7 star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-155 b goes round its star every 6.34 days, 14 times as often as Mercury goes round the Sun.
| Spectral type | K7 |
| Surface temperature | 4,258 K |
| Mass | 0.65 solar masses |
| Radius | 0.58 solar radii |
| Luminosity | 0.059 times the Sun |
| Apparent magnitude | 12.773 |
| Distance from the Sun | 237.4 light-years (72.8 parsecs) |
| Position (J2000) | RA 65.4696°, Dec 21.3533° |
| Constellation | Taurus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-155 b | 6.34 days | 0.0562 AU | 1.8 R⊕ | 3.89 M⊕ estimated | Transit, 2018 |
| K2-155 c | 13.8 days | 0.0946 AU | 2.6 R⊕ | 7.27 M⊕ estimated | Transit, 2018 |
| K2-155 d | 40.7 days | 0.194 AU | 1.9 R⊕ | 4.27 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.
For a star of 4,258 K, 0.059 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.25 to 0.46 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 237 years ago, around 1790.