Ice Giant Magnetic Field Moderate Activity
Why is this a Ice Giant? Your planet has moderate mass (5.1x 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: 5.1x Earth (5-20x range) ✓ Water/Carbon/Nitrogen rich composition
Habitability Score Uninhabitable
Contributing Factors water 15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans geology 90
Active geology recycles nutrients and drives carbon cycle rotation 60
Fast rotation - strong global wind patterns and weather systems, but manageable Organic Chemistry 84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry) atmosphere 30
Hydrogen-rich atmosphere typical of gas giants temperature 0
Near absolute zero - all molecular activity ceases, impossible for life magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
5.10x Earth (3.05e+25 kg) Radius
1.72x Earth (10,966 km) This planet: 1.72× Earth radius Earth: 1× (baseline)
Surface Gravity
1.72x Earth (16.9 m/s²) Surface Temperature
39 K (-234 °C / -390 °F) Rotation Period
1.0 hours/day (faster than Earth) This planet: 1 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
2119.60 AU (317 billion km) Orbital Period
30,859 years Atmosphere Hydrogen and helium with water, methane, and ammonia ices
Surface Characteristics Icy mantle surrounding rocky core, with hydrogen-helium atmosphere Closest Real Exoplanet Orbiting KMT-2021-BLG-0171L Yours KMT-2021-BLG-0171L b Mass 5.10 × Earth 11.2 × Earth Radius 2.60 × Earth 3.35 × Earth Density (composition) 1.60 g/cm³ 1.64 g/cm³ Temperature 38.9 K — Starlight received 0.00 × Earth — Star temperature — 5,200 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2022 via microlensing · 15,003 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons
Moon 1 rings 1.1% - 1.6 radii
Inside the Roche limit (1.92 planet radii): torn apart into a ring system.
Moon 2 receding 1.1% - 64.3 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry