GJ 251 · M3.0 V
GJ 251 c
Rank #21 of the ranked catalogue · Discovered by Radial Velocity in 2025
HZ 100%M sin i
0.474
Earth-2.0 index
0.729
Earth Similarity Index
100%
Habitable-zone probability
1.80 R⊕
Radius
Planet
Mass3.880 M⊕M sin i
Bulk density3.660 g/cm³
Orbital period53.6470 days
Semi-major axis0.19600 au
Eccentricity0.000
Incident flux0.404 S⊕
Equilibrium temperature202.7 K
Maximum angular separation35.12 masReflected-light contrast 1.46e-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
HostGJ 251
Spectral typeM3.0 V
Effective temperature3342 K
Radius0.360 R☉
Mass0.350 M☉
Distance5.6 pc / 18.2 ly
DiscoveryRadial Velocity, 2025