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: 4.43 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)
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere4
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
1.00x Earth (5.97e+24 kg)
Radius
1.00x Earth (6,371 km)
Surface Gravity
1.00x Earth (9.8 m/s²)
Surface Temperature
1,400 K (1,127 °C / 2,060 °F)
Rotation Period
24.0 hours/day
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
4.43 AU (663 million km)
Orbital Period
9.32 years
Atmosphere
Vaporized rock and impact ash - the original atmosphere blown off by the strike
Elemental Composition
N - Nitrogen
51.2%
O - Oxygen
31.4%
H - Hydrogen
5.9%
Surface Characteristics
Surface remelted by a catastrophic moon impact - a global magma ocean cooling into scarred rock