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: 150.00 AU, 1400K equilibrium
Habitability ScoreUninhabitable
5
Contributing Factors
water14
Good water content - boiling away, little would be retained
geology50
Extreme volcanic activity may be hazardous (impact-resurfaced crust)
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry29
Carbon and hydrogen present - organic chemistry possible - chlorine-laced environment attacks organic molecules (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere0
Atmosphere present but composition not ideal for life (partially stripped by slow rotation) (atmosphere partially stripped by the moon impact)
temperature5
Inferno world - temperatures exceed all possibility of life (large moon stabilizes the axial tilt - steady seasons)
magnetic Field100
Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative))
Physical Properties
Mass
1.70x Earth (1.02e+25 kg)
Radius
1.19x Earth (7,604 km)
Surface Gravity
1.19x Earth (11.7 m/s²)
Surface Temperature
1,400 K (1,127 °C / 2,060 °F)
Rotation Period
62.0 hours/day (slower than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
150.00 AU (22.4 billion km)
Orbital Period
1,837 years
Atmosphere
Vaporized rock and impact ash - the original atmosphere blown off by the strike
Elemental Composition
Si - Silicon
19.1%
O - Oxygen
17.0%
H - Hydrogen
14.9%
Surface Characteristics
Surface remelted by a catastrophic moon impact - a global magma ocean cooling into scarred rock
Merged with an adjacent moon: too close for both to hold a stable orbit.
Moon 2receding0.032% - 28.3 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 3receding0.22% - 14.1 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Moon 4crashed10% - 2.9 radii
Inside the synchronous orbit: tidal decay dragged it down - it struck the planet ages ago.
+5 temperature: large moon stabilizes the axial tilt - steady seasons+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry+5 magneticField: a large close moon may help stir the core dynamo (speculative)-36 atmosphere: atmosphere partially stripped by the moon impact+10 geology: impact-resurfaced crust