GJ 238 is 49.6 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M2.5 V star; the first was found in 2024 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DGJ 238 b goes round its star every 41.9 hours, 50 times as often as Mercury goes round the Sun.
| Spectral type | M2.5 V |
| Surface temperature | 3,485 K |
| Mass | 0.4193 solar masses |
| Radius | 0.4314 solar radii |
| Luminosity | 0.0242 times the Sun |
| Apparent magnitude | 11.62 |
| Distance from the Sun | 49.6 light-years (15.2 parsecs) |
| Position (J2000) | RA 98.4549°, Dec -58.5250° |
| Constellation | Pictor |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 238 b | 41.9 hours | 0.0212 AU | 0.566 R⊕ | 0.126 M⊕ estimated | Transit, 2024 |
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 3,485 K, 0.024 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.16 to 0.31 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.