81 Cet b
A confirmed exoplanet orbiting 81 Cet.
Compared with Earth
- Mass
- About 1,051 times Earth's mass.
- Year
- A year here lasts about 2.8 Earth years.
Planet
- Radius
- Unknown
- Mass
- 1,051 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 1,006 days
- Average distance from its star
- 2.104 AU
Star
- Host star
- 81 Cet
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,734 K
- Radius
- 11.21 × Sun
- Mass
- 1.23 × Sun
- Age
- Unknown
System
- Distance from Earth
- 330.3 light-years (101.3 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2008
- Method
- Radial Velocity
- Facility
- Okayama Astrophysical Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.