CONFIRMED EXOPLANET · Gas Giant

HD 128311 c

Orbits Host Star: HD 128311 (Type K0) · Distance: 53.300 Light-Years (16.329 pc)

Planetary Radius

13.000 R⊕

Planetary Mass

1204.258 M⊕

Surface Gravity

7.13 g / g⊕

Equilibrium Temp

158K (-115°C / -175°F)

Orbital Period

921.538 days

Discovery Year

2005 (Radial Velocity)

Habitability Assessment

❄️ Cryogenic Regime: At 158 K (-115°C / -175°F), surface volatiles would be frozen in a permanent snowball state without substantial internal geothermal or tidal heating.

Discovery Facility: W. M. Keck Observatory.

Other Worlds in the HD 128311 System (1)

HD 128311 b

Gas Giant · 453d

NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS

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