55 Cnc B · M4.5 V
55 Cnc B c
Rank #37 of the ranked catalogue · Discovered by Radial Velocity in 2025
HZ 97%M sin i
0.249
Earth-2.0 index
0.700
Earth Similarity Index
97%
Habitable-zone probability
2.16 R⊕
Radius
Planet
Mass5.300 M⊕M sin i
Bulk density2.890 g/cm³
Orbital period33.7470 days
Semi-major axis0.13000 au
Eccentricity0.000
Incident flux0.461 S⊕
Equilibrium temperature209.5 K
Maximum angular separation10.42 masReflected-light contrast 4.79e-8 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