Pirytius
0
Lava World
Magnetic FieldExtreme Activity
Why is this a Lava World?Runaway tidal heating from its moons keeps the surface molten - the planet is kneaded like Io, only far harder.
Resonant, close-in moons pump orbital eccentricity, and the resulting tidal flexing dissipates enormous heat in the interior. Past a threshold the crust cannot cool: volcanism resurfaces the world continuously.
Classification Criteria:
✓ Close-in moons in a resonant configuration✓ Tidal heat flux beyond the runaway threshold- Orbit itself was fine: 4.70 AU, 116K equilibrium
Habitability ScoreUninhabitable
Contributing Factors
water60
Water present but mostly frozen
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 (large moon stabilizes the axial tilt - steady seasons) (runaway tidal heating keeps the surface molten regardless of orbit)
magnetic Field100
Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative))
Physical Properties
Mass
0.80x Earth (4.78e+24 kg)Radius
0.93x Earth (5,914 km)Surface Gravity
0.93x Earth (9.1 m/s²)Surface Temperature
116 K (-157 °C / -251 °F)Rotation Period
18.0 hours/day (faster than Earth)Orbital Environment
Star Type
SNR-type (Supernova Remnant)Distance from Star
4.70 AU (703 million km)Orbital Period
8.61 yearsAtmosphere
Volcanic outgassing - sulfur compounds and vaporized rock
Elemental Composition
O - Oxygen
34.9%
H - Hydrogen
18.6%
Si - Silicon
17.4%
Surface Characteristics
Runaway tidal heating keeps the surface molten - volcanic activity everywhereClosest Real Exoplanet
EPIC 206317286 b79% similar
Orbiting EPIC 206317286| Yours | EPIC 206317286 b | |
|---|---|---|
| Mass | 0.80 × Earth | 0.84 × Earth |
| Radius | 0.94 × Earth | 0.96 × Earth |
| Density (composition) | 5.27 g/cm³ | 5.23 g/cm³ |
| Temperature | 115.7 K | — |
| Starlight received | 0.02 × Earth | — |
| Star temperature | — | 4,752 K |
Moons
Moon 1rings0.71% - 1.8 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 2receding1.4% - 9.9 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
Moon 3merged1.6% - 15.0 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
Moon 4receding1.1% - 22.8 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).