55 Cnc · G8 V
55 Cnc e
Rank #4483 of the ranked catalogue · Discovered by Radial Velocity in 2004
HZ 0%measured
0.074
Earth-2.0 index
0.120
Earth Similarity Index
0%
Habitable-zone probability
1.88 R⊕
Radius
Planet
Mass7.990 M⊕measured
Bulk density6.660 g/cm³
Orbital period0.7366 days
Semi-major axis0.01544 au
Eccentricity0.050
Incident flux2657.832 S⊕
Equilibrium temperature1825.1 K
Transit-time σ at 203014.9 minLinear propagation of published epoch and period errors; not a ranking input.
Maximum angular separation1.23 masReflected-light contrast 2.56e-6 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources6 · mixedThe archive may select different publications for different parameters; mixed-source is disclosed, not automatically penalised.
Default-solution coverage83%0% median composite-to-default difference over shared parameters.
Host star & system
Host55 Cnc
Spectral typeG8 V
Effective temperature5172 K
Radius0.943 R☉
Mass0.905 M☉
Distance12.6 pc / 41.0 ly
DiscoveryRadial Velocity, 2004