Kapteyn c
A confirmed exoplanet orbiting Kapteyn.
Compared with Earth
- Mass
- About 7 times Earth's mass.
- Year
- A year here lasts about 122 Earth days.
Planet
- Radius
- Unknown
- Mass
- 7 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 121.5 days
- Average distance from its star
- 0.311 AU
Star
- Host star
- Kapteyn
- Spectral class
- M — red dwarf
- Surface temperature
- 3,550 K
- Radius
- 0.291 × Sun
- Mass
- 0.281 × Sun
- Age
- Unknown
System
- Distance from Earth
- 12.83 light-years (3.933 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2014
- Method
- Radial Velocity
- Facility
- Multiple Observatories
Data from the NASA Exoplanet Archive, synced October 14, 2026.