Gas Giant Magnetic Field Extreme Activity
Why is this a Gas Giant? Your planet has 86.0% hydrogen and helium, combined with a mass of 10.1x Earth, which exceeds the gas giant threshold. Gas giants form when massive cores capture enormous atmospheres of light gases. They typically form beyond the 'frost line' where volatiles can condense.
✓ Hydrogen + Helium: 86.0% (>60% required) ✓ Mass: 10.1x Earth (>10x required)
Habitability Score Uninhabitable
Contributing Factors water 15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans geology 50
Extreme volcanic activity may be hazardous (tidal flexing sustains geologic activity) rotation 10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only Organic Chemistry 84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry) atmosphere 12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation) temperature 20
Very cold - water frozen, challenging for life magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
10.10x Earth (6.03e+25 kg) Radius
2.16x Earth (13,772 km) This planet: 2.16× Earth radius Earth: 1× (baseline)
Surface Gravity
2.16x Earth (21.2 m/s²) Surface Temperature
122 K (-152 °C / -241 °F) Rotation Period
10.0 hours/day (faster than Earth) This planet: 10 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
105.00 AU (15.7 billion km) Orbital Period
340.2 years Atmosphere Hydrogen and helium dominated with trace methane and ammonia
Surface Characteristics No solid surface - thick gaseous envelope with possible rocky core deep within Closest Real Exoplanet Orbiting GJ 229 Yours GJ 229 b Mass 10.1 × Earth 14.9 × Earth Radius 3.50 × Earth 3.97 × Earth Density (composition) 1.30 g/cm³ 1.31 g/cm³ Temperature 121.6 K 112.0 K Starlight received 0.04 × Earth 0.02 × Earth Star temperature — 3,564 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2014 via radial velocity · 19 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons
Moon 1 stable 0.00010% - 10.8 radii
Small and distant: a quiet, stable companion.
Tidal braking locked the planet to its moon: one face forever moonward.
Moon 2 stable 0.00010% - 9.3 radii
Small and distant: a quiet, stable companion.
Moon 3 stable Ocean world 0.010% - 4.1 radii
Small and distant: a quiet, stable companion.
A thin tidal-warmed subsurface ocean may exist, but conditions are marginal (24/100).
Moon 4 stable 0.00010% - 6.3 radii
Small and distant: a quiet, stable companion.
Moon 5 merged 0.00010% - 9.6 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
Moon 6 stable 0.00010% - 14.6 radii
Small and distant: a quiet, stable companion.
+10 geology: tidal flexing sustains geologic activity +4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry