Destroyed — no longer habitableMagnetic FieldExtreme Activity
Why is this a Volcanic World?
Runaway tidal heating from its moons drives volcanism across a cold crust - the planet is kneaded like Io.
Resonant, close-in moons pump orbital eccentricity, and the resulting tidal flexing dissipates enormous heat in the interior. Only a fraction of the surface is molten at once, so the ground between the vents stays as cold as the orbit allows - Io's own equilibrium temperature is about 110 K.
Classification Criteria:
✓ Close-in moons in a resonant configuration✓ Tidal heat flux beyond the runaway threshold- The orbit is not what melted it: 0.64 AU, 287K equilibrium
Habitability
Destroyed — no longer habitable
Physical Properties
Mass
3.40x Earth (2.03e+25 kg)
Radius
1.50x Earth (9,580 km)
Surface Gravity
1.50x Earth (14.8 m/s²)
Surface Temperature
287 K (14 °C / 58 °F)
Rotation Period
3.0 hours/day (faster than Earth)
Orbital Environment
Star Type
K-type (Orange)
Distance from Star
0.64 AU (95.7 million km)
Orbital Period
224 days
Atmosphere
Volcanic outgassing - sulfur compounds and vaporized rock
Elemental Composition
Si - Silicon
22.0%
Fe - Iron
12.6%
O - Oxygen
11.8%
Surface Characteristics
Runaway tidal heating drives volcanism across a cold crust - lava lakes and sulfur plains between frozen plains