Finding Earth 2.0
55 Cnc · G8 V

55 Cnc f

Rank #335 of the ranked catalogue · Discovered by Radial Velocity in 2007

HZ 36%measured

0.118

Earth-2.0 index

0.468

Earth Similarity Index

36%

Habitable-zone probability

7.59 R⊕

Radius

Planet

Mass44.812 M⊕measured
Bulk density0.563 g/cm³
Orbital period260.5800 days
Semi-major axis0.80200 au
Eccentricity0.063
Incident flux0.988 S⊕
Equilibrium temperature253.4 K
Maximum angular separation63.72 masReflected-light contrast 1.55e-8 at Aᵍ = 0.30 and Lambertian quadrature.
Composite parameter sources5 · 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
Spectral typeG8 V
Effective temperature5198 K
Radius0.980 R☉
Mass1.015 M☉
Distance12.6 pc / 41.0 ly
DiscoveryRadial Velocity, 2007