TOI-5811 B b

A confirmed exoplanet orbiting TOI-5811 B.

Compared with Earth

Size
About 22 times Earth's width.
Mass
About 257 times Earth's mass.
Temperature
About 1,257 °C (2,294 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
Starlight
About 1,320 times the starlight Earth gets from the Sun.
Year
A year here lasts about 6.3 Earth days.

Planet

Radius
21.97 × Earth
Mass
257.4 × Earth
Density
0.134 g/cm³
Equilibrium temperature
1,530 K
Starlight received
1,320 × Earth
Orbital period
6.257 days
Average distance from its star
0.0731 AU

Star

Host star
TOI-5811 B
Spectral class
K — orange dwarf
Surface temperature
4,840 K
Radius
3.73 × Sun
Mass
1.08 × Sun
Age
Unknown

System

Distance from Earth
554.9 light-years (170.1 parsecs)
Stars in system
3
Known planets
1

Discovery

Year
2026
Method
Transit
Facility
Multiple Observatories

Data from the NASA Exoplanet Archive, synced October 14, 2026.