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HD 85426 c is a Neptune-like exoplanet (an ice giant with a thick atmosphere) with a mass of 10.3 Earth masses. It has an equilibrium temperature of 640 K (367°C). The planet completes one orbit around its star every 35.7 Earth days. It was discovered in 2026 using the radial velocity method. It orbits the star TOI-1774, located approximately 54 parsecs (176 light-years) from Earth.
2026
Discovered
10.3
Earth Masses
640
Temperature (K)
Discovery Information
Discovery MethodRadial Velocity
Discovery Year2,026
Discovery FacilityMultiple Observatories
Orbital Properties
Orbital Period35.73 days
Semi-Major Axis0.2117 AU
Eccentricity0.06
Physical Properties
Mass (Jupiter)0.0324 MJ
Mass (Earth)10.3 M⊕
Eq. Temperature640 K
Planetary Extremes
Where HD 85426 c sits on the spectrum of all known exoplanets.
Mass10.3 M⊕
FeatherweightColossus
Temperature640 K
FrozenInferno
Year Length35.7 days
LightningGlacial
Star Distance0.212 AU
ScorchedFrozen exile
Star System View
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Orbit Comparison
Earth: 365.25 days (1 AU)HD 85426 c: 35.7 Earth days (0.212 AU)
Host Star: TOI-1774
Effective Temperature5,746 K
Mass0.991 M☉
Radius1.1303 R☉
Size vs Sun1.13x larger
Metallicity [Fe/H]-0.02
Distance (pc)53.974 pc
Distance (ly)176.0 light-years
Planets in the TOI-1774 System
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