TOI-1173 is 432 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G9 star; the first was found in 2024 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-1173 b goes round its star every 7.06 days, 12 times as often as Mercury goes round the Sun.
TOI-1173 is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.
| Spectral type | G9 |
| Surface temperature | 5,350 K |
| Mass | 0.911 solar masses |
| Radius | 0.934 solar radii |
| Luminosity | 0.678 times the Sun |
| Apparent magnitude | 11.038 |
| Age | about 8.7 billion years |
| Distance from the Sun | 431.7 light-years (132.4 parsecs) |
| Position (J2000) | RA 197.6831°, Dec 70.7680° |
| Constellation | Ursa Minor |
TOI-1173 B is a G7V star of magnitude 11.24, moving through space with it. In 2016 it was 86.7″ from TOI-1173, at position angle 246° (Washington Double Star Catalog, 13107+7046 BVD 100): 11,475 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-1173 b | 7.06 days | 0.0710 AU | 8.7766 R⊕ | 28.287 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.