55 Cnc B · M4.5 V
55 Cnc B b
Rank #199 of the ranked catalogue · Discovered by Radial Velocity in 2025
HZ 0%M sin i
0.124
Earth-2.0 index
0.675
Earth Similarity Index
0%
Habitable-zone probability
1.69 R⊕
Radius
Planet
Mass3.500 M⊕M sin i
Bulk density3.980 g/cm³
Orbital period6.7994 days
Semi-major axis0.04400 au
Eccentricity0.000
Incident flux4.027 S⊕
Equilibrium temperature360.1 K
Maximum angular separation3.53 masReflected-light contrast 2.56e-7 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources3 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage67%0% median composite-to-default difference over shared parameters.
Host star & system
Host55 Cnc B
Spectral typeM4.5 V
Effective temperature3286 K
Radius0.274 R☉
Mass0.260 M☉
Distance12.5 pc / 40.7 ly
DiscoveryRadial Velocity, 2025