HD 238090 is 49.7 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0.0 V star; the first was found in 2020 by radial velocity (Multiple Observatories).
Fly there in 3DHD 238090 b goes round its star every 13.7 days, 6 times as often as Mercury goes round the Sun.
| Spectral type | M0.0 V |
| Surface temperature | 3,933 K |
| Mass | 0.578 solar masses |
| Radius | 0.57 solar radii |
| Luminosity | 0.0702 times the Sun |
| Apparent magnitude | 9.71 |
| Distance from the Sun | 49.7 light-years (15.2 parsecs) |
| Position (J2000) | RA 183.0886°, Dec 54.4862° |
| Constellation | Ursa Major |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 238090 b | 13.7 days | 0.0932 AU | 2.52 R⊕ estimated | 6.89 M⊕ minimum | Radial Velocity, 2020 |
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 3,933 K, 0.070 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.27 to 0.52 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 50 years ago, within living memory.