TOI-5811 B is 555 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K2 IV+ star; the first was found in 2026 by transit (Multiple Observatories).
Fly there in 3DTOI-5811 B b goes round its star every 6.26 days, 14 times as often as Mercury goes round the Sun.
TOI-5811 B is one of 3 stars in its system: TOI-5811 A drawn from the Washington Double Star Catalog; the position of one more star is not catalogued, so it is not drawn.
| Spectral type | K2 IV+ |
| Surface temperature | 4,840 K |
| Mass | 1.08 solar masses |
| Radius | 3.73 solar radii |
| Luminosity | 6.877 times the Sun |
| Apparent magnitude | 8.85 |
| Distance from the Sun | 554.9 light-years (170.1 parsecs) |
| Position (J2000) | RA 310.9101°, Dec 19.7292° |
| Constellation | Delphinus |
TOI-5811 A is a G5 star of magnitude 8.32, moving through space with it. In 2020 it was 7.5″ from TOI-5811 B, at position angle 126° (Washington Double Star Catalog, 20436+1944 STF2722): 1,276 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-5811 B b | 6.26 days | 0.0731 AU | 21.97 R⊕ | 257.44 M⊕ | Transit, 2026 |
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.