TOI-406 is 101 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M3 star; the first was found in 2024 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-406 c goes round its star every 3.31 days, 27 times as often as Mercury goes round the Sun.
| Spectral type | M3 |
| Surface temperature | 3,392 K |
| Mass | 0.408 solar masses |
| Radius | 0.41 solar radii |
| Luminosity | 0.0193 times the Sun |
| Apparent magnitude | 13.773 |
| Distance from the Sun | 101.3 light-years (31.1 parsecs) |
| Position (J2000) | RA 49.2626°, Dec -42.2441° |
| Constellation | Eridanus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-406 c | 3.31 days | 0.0322 AU | 1.32 R⊕ | 2.08 M⊕ | Transit, 2024 |
| TOI-406.01 | 13.2 days | 0.0809 AU | 2.08 R⊕ | 6.57 M⊕ | 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 3,392 K, 0.019 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.14 to 0.28 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 101 years ago, around 1920.