Ross 128 · M4
Ross 128 b
Rank #84 of the ranked catalogue · Discovered by Radial Velocity in 2017
HZ 0%M sin i
0.136
Earth-2.0 index
0.916
Earth Similarity Index
0%
Habitable-zone probability
1.11 R⊕
Radius
Planet
Mass1.400 M⊕M sin i
Bulk density5.630 g/cm³
Orbital period9.8658 days
Semi-major axis0.04960 au
Eccentricity0.116
Incident flux1.380 S⊕
Equilibrium temperature275.5 K
Maximum angular separation14.70 masReflected-light contrast 8.69e-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 coverage83%0% median composite-to-default difference over shared parameters.
Host star & system
HostRoss 128
Spectral typeM4
Effective temperature3192 K
Radius0.197 R☉
Mass0.168 M☉
Distance3.4 pc / 11.0 ly
DiscoveryRadial Velocity, 2017