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: 1.04 AU, 1219K equilibrium
Habitability
Destroyed — no longer habitable
Physical Properties
Mass
9534.00x Earth (5.69e+28 kg)
Radius
21.20x Earth (135,093 km)
Surface Gravity
21.20x Earth (208.0 m/s²)
Surface Temperature
1,219 K (946 °C / 1,735 °F)
Rotation Period
2.0 hours/day (faster than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
1.04 AU (156 million km)
Orbital Period
123 days
Atmosphere
Volcanic outgassing - sulfur compounds and vaporized rock
Elemental Composition
Si - Silicon
41.1%
Fe - Iron
27.4%
O - Oxygen
13.7%
Surface Characteristics
Runaway tidal heating drives volcanism across a cold crust - lava lakes and sulfur plains between frozen plains
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2023 via radial velocity · 199 light-years awaySource: NASA Exoplanet Archive