K2-146 is 259 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M3.0 V star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-146 b goes round its star every 2.64 days, 33 times as often as Mercury goes round the Sun.
| Spectral type | M3.0 V |
| Surface temperature | 3,385 K |
| Mass | 0.331 solar masses |
| Radius | 0.33 solar radii |
| Luminosity | 0.015 times the Sun |
| Apparent magnitude | 16.7 |
| Age | about 5 billion years |
| Distance from the Sun | 258.6 light-years (79.3 parsecs) |
| Position (J2000) | RA 130.0267°, Dec 19.0923° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-146 b | 2.64 days | 0.0248 AU | 2.05 R⊕ | 5.77 M⊕ | Transit, 2018 |
| K2-146 c | 4.00 days | 0.0327 AU | 2.19 R⊕ | 7.49 M⊕ | Transit, 2019 |
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 3,385 K, 0.015 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.13 to 0.25 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 259 years ago, around 1770.