GJ 3378 · M4 V
GJ 3378 b
Rank #19 of the ranked catalogue · Discovered by Radial Velocity in 2026
HZ 34%M sin i
0.522
Earth-2.0 index
0.920
Earth Similarity Index
34%
Habitable-zone probability
1.32 R⊕
Radius
Planet
Mass2.300 M⊕M sin i
Bulk density5.500 g/cm³
Orbital period21.4500 days
Semi-major axis0.09673 au
Eccentricity0.000
Incident flux0.910 S⊕
Equilibrium temperature248.3 K
Maximum angular separation12.53 masReflected-light contrast 3.23e-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 3378
Spectral typeM4 V
Effective temperature3340 K
Radius0.275 R☉
Mass0.262 M☉
Distance7.7 pc / 25.2 ly
DiscoveryRadial Velocity, 2026