K2-189 is 790 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,442 K star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-189 b goes round its star every 2.59 days, 34 times as often as Mercury goes round the Sun.
| Surface temperature | 5,442 K |
| Mass | 0.85 solar masses |
| Radius | 0.879 solar radii |
| Luminosity | 0.6046 times the Sun |
| Apparent magnitude | 12.398 |
| Distance from the Sun | 789.7 light-years (242.1 parsecs) |
| Position (J2000) | RA 203.6214°, Dec -15.0365° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-189 b | 2.59 days | 0.0361 AU | 1.403 R⊕ | 2.55 M⊕ estimated | Transit, 2018 |
| K2-189 c | 6.68 days | 0.0680 AU | 2.31 R⊕ | 5.95 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 5,442 K, 0.60 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.75 to 1.34 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 790 years ago, around 1240.