Why is this a Ice World?Your planet orbits at 4.00 AU from its star, resulting in frigid temperatures of 148K.
Ice worlds form beyond the frost line where temperatures are low enough for water and other volatiles to freeze solid. They may have subsurface oceans beneath thick ice shells.
Classification Criteria:
✓ Distance: 4.00 AU (>3 AU) or Temperature <200K✓ Temperature: 148K✓ Water content: 44.1% for ice formation
Habitability ScoreExtremely Harsh
20
Contributing Factors
water22
Abundant water - frozen solid, no liquid phase at this temperature
geology60
Some geological activity provides slow nutrient cycling
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature25
Very cold - water frozen, challenging 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
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
148 K (-125 °C / -192 °F)
Rotation Period
18.0 hours/day (faster than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
4.00 AU (598 million km)
Orbital Period
8.00 years
Atmosphere
Thin nitrogen and methane atmosphere
Elemental Composition
O - Oxygen
35.3%
H - Hydrogen
17.6%
Si - Silicon
17.6%
Surface Characteristics
Frozen surface covered in water ice, possible subsurface ocean if tidal heating present