Magnetic Field Extreme Activity
Why is this a Gas Giant? Your planet has 65.0% hydrogen and helium, combined with a mass of 807.0x 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: 65.0% (>60% required) ✓ Mass: 807.0x Earth (>10x required)
Habitability Score Extremely Harsh
Contributing Factors water 15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans geology 40
Extreme volcanic activity may be hazardous rotation 100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution Organic Chemistry 80
Core organic elements (CHNO) present atmosphere 30
Hydrogen-rich atmosphere typical of gas giants temperature 40
Extreme temperature - very difficult for life magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
807.00x Earth (4.82e+27 kg) Radius
9.31x Earth (59,315 km) This planet: 9.31× Earth radius Earth: 1× (baseline)
Surface Gravity
9.31x Earth (91.3 m/s²) Surface Temperature
237 K (-36 °C / -34 °F) Rotation Period
16.0 hours/day (faster than Earth) This planet: 16 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
62.60 AU (9.36 billion km) Orbital Period
156.6 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 Kepler-539 Yours Kepler-539 c Mass 807.0 × Earth 763.0 × Earth Radius 15.1 × Earth 13.3 × Earth Density (composition) 1.30 g/cm³ 1.79 g/cm³ Temperature 236.7 K 253.0 K Starlight received 0.10 × Earth 0.15 × Earth Star temperature — 5,820 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2016 via transit timing variations · 1,001 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons
Moon 1 rings 0.00018% - 1.8 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).