Why is this a Ice World?Your planet orbits at 31.10 AU from its star, resulting in frigid temperatures of 238K.
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: 31.10 AU (>3 AU) or Temperature <200K✓ Temperature: 238K✓ Water content: 44.1% for ice formation
Habitability ScoreMarginal
40
Contributing Factors
water71
Abundant water - mostly frozen
geology60
Some geological activity provides slow nutrient cycling
rotation30
Very slow rotation - severe 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)
atmosphere42
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature40
Extreme temperature - very difficult for life
magnetic Field100
Magnetic field provides radiation protection — but the black hole's accretion disk bathes this orbit in hard X-ray radiation
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
238 K (-35 °C / -31 °F)
Rotation Period
18.0 hours/day (faster than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
31.10 AU (4.65 billion km)
Orbital Period
54.8 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
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2017 via transit · 40 light-years awaySource: NASA Exoplanet Archive