K2-154 is 422 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M0.0 V star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-154 b goes round its star every 3.68 days, 24 times as often as Mercury goes round the Sun.
| Spectral type | M0.0 V |
| Surface temperature | 4,097 K |
| Mass | 0.65 solar masses |
| Radius | 0.63 solar radii |
| Luminosity | 0.096 times the Sun |
| Apparent magnitude | 13.861 |
| Distance from the Sun | 421.9 light-years (129.4 parsecs) |
| Position (J2000) | RA 189.0015°, Dec -2.6696° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-154 b | 3.68 days | 0.0405 AU | 1.99 R⊕ | 4.62 M⊕ estimated | Transit, 2018 |
| K2-154 c | 7.95 days | 0.0677 AU | 2.07 R⊕ | 4.94 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 4,097 K, 0.096 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.32 to 0.60 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 422 years ago, around 1600.