Habitability
15/ 100
Uninhabitable

Neptune

0

Ice Giant

Magnetic FieldModerate Activity
Why is this a Ice Giant?Your planet has moderate mass (17.0x 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.
Classification Criteria:
✓ Mass: 17.0x Earth (5-20x range)✓ Water/Carbon/Nitrogen rich composition
Habitability ScoreUninhabitable
15
Contributing Factors
water60
Water present but mostly frozen
geology90
Active geology recycles nutrients and drives carbon cycle
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)
temperature10
Frozen world - minimal potential for complex life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
17.00x Earth (1.02e+26 kg)
Radius
2.57x Earth (16,382 km)
This planet: 2.57× Earth radiusEarth: 1× (baseline)
Surface Gravity
2.57x Earth (25.2 m/s²)
Surface Temperature
76 K (-197 °C / -322 °F)
Rotation Period
16.0 hours/day (faster than Earth)
This planet: 16 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
30.00 AU (4.49 billion km)

Atmosphere

Hydrogen and helium with water, methane, and ammonia ices

Elemental Composition

H - Hydrogen
40.0%
He - Helium
25.0%
C - Carbon
15.0%

Surface Characteristics

Icy mantle surrounding rocky core, with hydrogen-helium atmosphere

Closest Real Exoplanet

G 192-15 c78% similar
Orbiting G 192-15
YoursG 192-15 c
Mass17.0 × Earth14.3 × Earth
Radius2.57 × Earth3.87 × Earth
Temperature76.4 K56.0 K
Starlight received0.00 × Earth0.00 × Earth
Star temperature5,600 K2,999 K
Discovered 2025 via radial velocity · 31 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings0.55% - 1.7 radii

Inside the Roche limit (1.79 planet radii): torn apart into a ring system.

Moon 2receding0.48% - 17.9 radii

Outside the synchronous orbit: slowly receding, like Luna (~cm per year).

Tidal braking locked the planet to its moon: one face forever moonward.

+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry