TOI-6255 is 66.3 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 3,421 K star; the first was found in 2024 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-6255 b goes round its star every 5.7 hours, 369 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 3,421 K |
| Mass | 0.353 solar masses |
| Radius | 0.37 solar radii |
| Luminosity | 0.01685 times the Sun |
| Apparent magnitude | 12.747 |
| Distance from the Sun | 66.3 light-years (20.3 parsecs) |
| Position (J2000) | RA 331.5032°, Dec 39.2988° |
| Constellation | Lacerta |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-6255 b | 5.7 hours | 0.0053 AU from Kepler’s law | 1.079 R⊕ | 1.44 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 3,421 K, 0.017 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 0.26 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 66 years ago, within living memory.