K2-105 is 646 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K1 star; the first was found in 2017 by transit (K2).
Fly there in 3DK2-105 b goes round its star every 8.27 days, 11 times as often as Mercury goes round the Sun.
| Spectral type | K1 |
| Surface temperature | 5,373 K |
| Mass | 0.94 solar masses |
| Radius | 0.905 solar radii |
| Luminosity | 0.6473 times the Sun |
| Apparent magnitude | 11.752 |
| Age | about 0.6 billion years |
| Distance from the Sun | 645.8 light-years (198.0 parsecs) |
| Position (J2000) | RA 125.4203°, Dec 13.4975° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-105 b | 8.27 days | 0.0796 AU | 3.4 R⊕ | 15.4 M⊕ | Transit, 2017 |
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 5,373 K, 0.65 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.78 to 1.40 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 646 years ago, around 1380.