Kapteyn c is an exoplanet orbiting the nearby red dwarf star Kapteyn's Star. It has a mass of about ≥7.0M🜨, a semimajor axis of ~0.311AU and an orbital eccentricity of 0.23±0.1. It is beyond the host star's habitable zone.[3][4] It has been described by its discoverers as a cold Super-Earth.[5]
![]() | It has been suggested that this article be merged into Kapteyn's Star. (Discuss) Proposed since September 2022. |
Discovery | |
---|---|
Discovery date | 2014 |
Detection method | Radial Velocity |
Orbital characteristics | |
Semi-major axis | 0.311 AU (46,500,000 km) |
Star | Kapteyn's star |
Physical characteristics | |
Mass | 7 MEarth |
In 2021, existence of the planet was questioned after the rotational period of the star was refined.[6]