TOI-2406 is 181 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M4 V star; the first was found in 2021 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-2406 b goes round its star every 3.08 days, 29 times as often as Mercury goes round the Sun.
| Spectral type | M4 V |
| Surface temperature | 3,100 K |
| Mass | 0.166 solar masses |
| Radius | 0.204 solar radii |
| Luminosity | 0.00345 times the Sun |
| Distance from the Sun | 180.8 light-years (55.4 parsecs) |
| Position (J2000) | RA 8.8061°, Dec -3.3721° |
| Constellation | Cetus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-2406 b | 3.08 days | 0.0227 AU | 2.86 R⊕ | 15.6 M⊕ | Transit, 2021 |
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 3,100 K, 0.0034 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.061 to 0.12 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 181 years ago, around 1850.