Why is this a Gas Giant?Your planet has 86.0% hydrogen and helium, combined with a mass of 17.0x 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.
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology40
Extreme volcanic activity may be hazardous
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)
temperature0
Near absolute zero - all molecular activity ceases, impossible for 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)
Surface Gravity
2.57x Earth (25.2 m/s²)
Surface Temperature
23 K (-250 °C / -419 °F)
Rotation Period
2,000.0 hours/day (slower than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
3000.00 AU (449 billion km)
Orbital Period
51,962 years
Atmosphere
Hydrogen and helium dominated with trace methane and ammonia
Elemental Composition
H - Hydrogen
53.8%
He - Helium
32.3%
C - Carbon
5.4%
Surface Characteristics
No solid surface - thick gaseous envelope with possible rocky core deep within
Closest Real Exoplanet
KMT-2023-BLG-1896L b79% similar
Orbiting KMT-2023-BLG-1896L
Yours
KMT-2023-BLG-1896L b
Mass
17.0 × Earth
16.4 × Earth
Radius
4.16 × Earth
4.19 × Earth
Density (composition)
1.30 g/cm³
1.23 g/cm³
Temperature
22.8 K
—
Starlight received
0.00 × Earth
—
Star temperature
—
—
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2025 via microlensing · 17,906 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings3.2% - 1.6 radii
Inside the Roche limit (1.79 planet radii): torn apart into a ring system.
