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: 5.00 AU, 125K equilibrium
Habitability ScoreUninhabitable
0
Contributing Factors
water20
Good water content - frozen solid, no liquid phase at this temperature
geology40
Extreme volcanic activity may be hazardous
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere16
Atmosphere present but composition not ideal for life (partially stripped by slow rotation)
temperature0
Very cold - water frozen, challenging for life (runaway tidal heating keeps the surface molten regardless of orbit)
magnetic Field100
Magnetic field provides radiation protection
Physical Properties
Mass
10.10x Earth (6.03e+25 kg)
Radius
2.16x Earth (13,772 km)
Surface Gravity
2.16x Earth (21.2 m/s²)
Surface Temperature
125 K (-149 °C / -235 °F)
Rotation Period
10.0 hours/day (faster than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
5.00 AU (748 million km)
Orbital Period
11.2 years
Atmosphere
Volcanic outgassing - sulfur compounds and vaporized rock
Elemental Composition
H - Hydrogen
53.8%
He - Helium
32.3%
C - Carbon
5.4%
Surface Characteristics
Runaway tidal heating drives volcanism across a cold crust - lava lakes and sulfur plains between frozen plains