alf Ari b
A confirmed exoplanet orbiting alf Ari.
Compared with Earth
- Mass
- About 572 times Earth's mass.
- Year
- A year here lasts about 1 Earth year.
Planet
- Radius
- Unknown
- Mass
- 572.1 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 380.8 days
- Average distance from its star
- 1.2 AU
Star
- Host star
- alf Ari
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,553 K
- Radius
- 13.9 × Sun
- Mass
- 1.5 × Sun
- Age
- Unknown
System
- Distance from Earth
- 65.92 light-years (20.21 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2010
- Method
- Radial Velocity
- Facility
- Bohyunsan Optical Astronomical Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.