TOI-157 is 1,160 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G9 IV star; the first was found in 2020 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-157 b goes round its star every 2.08 days, 42 times as often as Mercury goes round the Sun.
| Spectral type | G9 IV |
| Surface temperature | 5,404 K |
| Mass | 0.948 solar masses |
| Radius | 1.167 solar radii |
| Luminosity | 1.047 times the Sun |
| Apparent magnitude | 12.725 |
| Age | about 12.82 billion years |
| Distance from the Sun | 1160.1 light-years (355.7 parsecs) |
| Position (J2000) | RA 73.7014°, Dec -76.6806° |
| Constellation | Mensa |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-157 b | 2.08 days | 0.0314 AU | 14.415 R⊕ | 375.04 M⊕ | Transit, 2020 |
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 5,404 K, 1.0 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.99 to 1.77 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 1,160 years ago, around AD 870.