Why is this a Lava World?A moon inside the synchronous orbit spiraled in and struck the planet. The impact remelted the surface into a global magma ocean.
Tidal decay drags close-in moons down over millions of years. A large enough impactor liquefies the crust, strips atmosphere, and resets the surface - whatever the orbit's temperature would otherwise allow.
Classification Criteria:
✓ Moon inside the synchronous orbit (tidal decay)✓ Impactor massive enough to remelt the crust- Orbit itself was fine: 384.90 AU, 1400K equilibrium
Habitability ScoreUninhabitable
0
Contributing Factors
water8
Limited water content - boiling away, little would be retained
geology50
Extreme volcanic activity may be hazardous (impact-resurfaced crust)
rotation30
Very slow rotation - extreme temperature swings between eternal day and night sides
Organic Chemistry84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere38
Atmosphere present but composition not ideal for life (atmosphere partially stripped by the moon impact)
temperature0
Inferno world - temperatures exceed all possibility of life
magnetic Field100
Magnetic field provides radiation protection
Physical Properties
Mass
3.30x Earth (1.97e+25 kg)
Radius
1.49x Earth (9,485 km)
Surface Gravity
1.49x Earth (14.6 m/s²)
Surface Temperature
1,400 K (1,127 °C / 2,060 °F)
Rotation Period
56.0 hours/day (slower than Earth)
Orbital Environment
Star Type
O-type (Blue Supergiant)
Distance from Star
384.90 AU (57.6 billion km)
Orbital Period
1,379 years
Atmosphere
Vaporized rock and impact ash - the original atmosphere blown off by the strike
Elemental Composition
O - Oxygen
31.3%
Si - Silicon
25.0%
N - Nitrogen
12.5%
Surface Characteristics
Surface remelted by a catastrophic moon impact - a global magma ocean cooling into scarred rock
Inside the synchronous orbit: tidal decay dragged it down - it struck the planet ages ago.
Moon 2receding0.020% - 90.1 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Moon 3merged10% - 94.0 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry-2 atmosphere: atmosphere partially stripped by the moon impact+10 geology: impact-resurfaced crust