TOI-178 is 205 light-years from the Sun. The NASA Exoplanet Archive lists 6 planets around this K star; the first was found in 2021 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-178 b goes round its star every 45.9 hours, 46 times as often as Mercury goes round the Sun.
| Spectral type | K |
| Surface temperature | 4,316 K |
| Mass | 0.647 solar masses |
| Radius | 0.662 solar radii |
| Luminosity | 0.136 times the Sun |
| Apparent magnitude | 11.955 |
| Age | about 6 billion years |
| Distance from the Sun | 204.5 light-years (62.7 parsecs) |
| Position (J2000) | RA 7.3020°, Dec -30.4541° |
| Constellation | Sculptor |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-178 b | 45.9 hours | 0.0261 AU | 1.2 R⊕ | 0.96 M⊕ | Transit, 2021 |
| TOI-178 c | 3.24 days | 0.0370 AU | 1.754 R⊕ | 4.64 M⊕ | Transit, 2021 |
| TOI-178 d | 6.56 days | 0.0592 AU | 2.695 R⊕ | 5.2 M⊕ | Transit, 2021 |
| TOI-178 e | 9.96 days | 0.0783 AU | 2.301 R⊕ | 3.48 M⊕ | Transit, 2021 |
| TOI-178 f | 15.2 days | 0.104 AU | 2.417 R⊕ | 5.63 M⊕ | Transit, 2021 |
| TOI-178 g | 20.7 days | 0.128 AU | 2.939 R⊕ | 4.4 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.