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2025
Discovered
3.9
Earth Masses
216
Temperature (K)
Discovery Information
Discovery MethodRadial Velocity
Discovery Year2,025
Discovery FacilityMultiple Observatories
Orbital Properties
Orbital Period53.647 days
Semi-Major Axis0.196 AU
Eccentricity0
Physical Properties
Mass (Jupiter)0.0122 MJ
Mass (Earth)3.88 M⊕
Eq. Temperature216 K
Insolation Flux0.404 S⊕
Planetary Extremes
Where GJ 251 c sits on the spectrum of all known exoplanets.
Mass3.9 M⊕
FeatherweightColossus
Temperature216 K
FrozenInferno
Year Length53.6 days
LightningGlacial
Star Distance0.196 AU
ScorchedFrozen exile
Orbit Comparison
Earth: 365.25 days (1 AU)GJ 251 c: 53.6 Earth days (0.196 AU)
Host Star: GJ 251
Effective Temperature3,342 K
Mass0.35 M☉
Radius0.36 R☉
Size vs Sun2.78x smaller
Luminosity0.0155 L☉
Luminosity vs Sun64.5x dimmer
Metallicity [Fe/H]0.07
Distance (pc)5.5806 pc
Distance (ly)18.2 light-years
Star System View
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Other Planets in the GJ 251 System
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