Kapteyn c
Orbiting Kapteyn
Kapteyn c is an exoplanet orbiting the star Kapteyn, discovered in 2014 using the Radial Velocity method.
Minimum Mass (M sin i)
7.00
Earth masses
Orbital Period
121.5
days
Distance
3.9
parsecs
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
7.00
Radial-velocity minimum
Equilibrium Temperature
Unknown
Parameter source: Anglada-Escudé et al. 2014
Orbital Period
121.540+0.250−0.250days
Semi-Major Axis
0.3110+0.0380−0.0140au
M sin(i) (Earth masses)
7.00+1.20−1.00
M sin(i) (Jupiter masses)
0.0220+0.0040−0.0030
Eccentricity
0.2300+0.1000−0.1200
Argument of Periastron
3.9+28.9−33.2deg
Radial Velocity Semi-Amplitude
2.27+0.28−0.26m/s
Distance from Earth
3.9 pc (~13 ly)
Spectral Type
Unknown
Temperature
3550 K
Mass (Solar)
0.28 M☉
Radius (Solar)
0.29 R☉
Luminosity
Unknown
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
77.9587°, -45.0430°
Discovery Method
Radial Velocity
Discovery Year
2014
Source ID: Kapteyn c
Kapteyn c orbits Kapteyn and was reported in 2014 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 7 Earth masses (M sin i) and an orbital period of 121.54 days.
Catalog data places the system at about 3.9 parsecs from Earth and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open Kapteyn