Proxima Cen d
Orbiting Proxima Cen
Proxima Cen d is an exoplanet orbiting the star Proxima Cen, discovered in 2025 using the Radial Velocity method.
Minimum Mass (M sin i)
0.26
Earth masses
Orbital Period
5.1
days
Distance
1.3
parsecs
Equilibrium Temp
282
K
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
0.26
Radial-velocity minimum
Equilibrium Temperature
282 K
Parameter source: Suárez Mascareño et al. 2025
Orbital Period
5.123+0.000−0.000days
Semi-Major Axis
0.0288+0.0002−0.0002au
M sin(i) (Earth masses)
0.26+0.04−0.04
M sin(i) (Jupiter masses)
0.0008+0.0001−0.0001
Eccentricity
0.0000
Epoch of Periastron
2460557.55+0.16−0.16days(JD)
Radial Velocity Semi-Amplitude
0.39+0.06−0.06m/s
Distance from Earth
1.3 pc (~4 ly)
Spectral Type
M5.5 V
Temperature
2900 K
Mass (Solar)
0.12 M☉
Radius (Solar)
0.14 R☉
Luminosity
-2.82 log L☉
Planets in System
2
Stars in System
3
Coordinates (RA, Dec)
217.3935°, -62.6762°
Discovery Method
Radial Velocity
Discovery Year
2025
Source ID: Proxima Cen d
Proxima Cen d orbits Proxima Cen and was reported in 2025 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 0.26 Earth masses (M sin i), an orbital period of 5.12 days, and an equilibrium temperature near 282 K.
Catalog data places the system at about 1.3 parsecs from Earth, a host star classified as M5.5 V, and 2 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open Proxima CenMore planets in this system