K2-165 is 439 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,185 K star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-165 b goes round its star every 2.35 days, 37 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 5,185 K |
| Mass | 0.834847 solar masses |
| Radius | 0.803827 solar radii |
| Luminosity | 0.4268 times the Sun |
| Apparent magnitude | 11.332 |
| Distance from the Sun | 439.0 light-years (134.6 parsecs) |
| Position (J2000) | RA 184.9005°, Dec 0.9683° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-165 b | 2.35 days | 0.0326 AU from Kepler’s law | 1.2744 R⊕ | 2.17 M⊕ estimated | Transit, 2018 |
| K2-165 c | 4.38 days | 0.0493 AU from Kepler’s law | 1.5541 R⊕ | 3.03 M⊕ estimated | Transit, 2018 |
| K2-165 d | 14.1 days | 0.108 AU from Kepler’s law | 2.6481 R⊕ | 7.5 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 5,185 K, 0.43 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.64 to 1.15 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 439 years ago, around 1590.