Ice Giant
No life — too cold for liquid waterMagnetic FieldModerate Activity
Why is this a Ice Giant?Your planet has moderate mass (9.1x Earth) with significant water, carbon, and nitrogen content, characteristic of ice giants.Ice giants like Uranus and Neptune have icy interiors with thick atmospheres of hydrogen and helium, but not enough to be classified as gas giants.
✓ Mass: 9.1x Earth (5-20x range)✓ Water/Carbon/Nitrogen rich composition
Habitability ScoreUninhabitable
Contributing Factorswater15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceansgeology90
Active geology recycles nutrients and drives carbon cyclerotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone onlyOrganic Chemistry80
Core organic elements (CHNO) presentatmosphere12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)temperature5
Near absolute zero - all molecular activity ceases, impossible for 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
9.10x Earth (5.43e+25 kg)Radius
2.09x Earth (13,301 km)Surface Gravity
2.09x Earth (20.5 m/s²)Surface Temperature
32 K (-241 °C / -402 °F)Rotation Period
192.0 hours/day (slower than Earth)Orbital Environment
Distance from Star
54.90 AU (8.21 billion km)Orbital Period
486.2 yearsAtmosphere
Hydrogen and helium with water, methane, and ammonia ices
Surface Characteristics
Icy mantle surrounding rocky core, with hydrogen-helium atmosphereMoons
Moon 1recedingOcean world0.010% - 27.7 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
A thin tidal-warmed subsurface ocean may exist, but conditions are marginal (32/100).
Moon 2merged10% - 38.6 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
+5 temperature: large moon stabilizes the axial tilt - steady seasons+5 magneticField: a large close moon may help stir the core dynamo (speculative)