81 Ceti
Listed as 81 Cet in the NASA Exoplanet Archive.
81 Ceti is a G5 III star 330 light years away with 1 known planet. It was found in 2008.
Open in 3DPlanets
| Planet | Orbital period | Distance from star | Radius (Earths) | Mass (Earths) | Found | Method |
|---|---|---|---|---|---|---|
| 81 Cet b | 2.753 years | 2.104 AU | at least 1,051 | 2008 | Radial Velocity |
"At least" is a minimum mass. Radial velocity can only measure mass times the sine of the orbit's tilt.
Star
- Spectral type G5 III
- 4,734 K surface temperature
- 1.23 times the mass of the Sun
- 11.21 times the radius of the Sun
Data from the NASA Exoplanet Archive, as of October 3, 2026. In the 3D view sizes and distances are compressed and every orbit is drawn in the same plane. Where each planet sits along its orbit is made up.