TOI-1801 is 100 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0.5+/-0.5 V star; the first was found in 2023 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-1801 b goes round its star every 10.6 days, 8 times as often as Mercury goes round the Sun.
TOI-1801 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 | M0.5+/-0.5 V |
| Surface temperature | 3,863 K |
| Mass | 0.556 solar masses |
| Radius | 0.547 solar radii |
| Luminosity | 0.05888 times the Sun |
| Apparent magnitude | 11.58 |
| Age | about 0.7 billion years |
| Distance from the Sun | 100.1 light-years (30.7 parsecs) |
| Position (J2000) | RA 175.5756°, Dec 23.0270° |
| Constellation | Leo |
TOI-1801 B has no spectral type listed of magnitude 14.23, judged a true companion. In 2016 it was 105.1″ from TOI-1801, at position angle 22° (Washington Double Star Catalog, 11423+2302 LDS 926): 3,224 AU on the sky at this distance. The true distance can only be larger. Its colour is estimated from its brightness.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-1801 b | 10.6 days | 0.0750 AU | 2.079 R⊕ | 5.738 M⊕ | Transit, 2023 |
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.