This blanet is orbiting BH MCF 165477-56464 and is a water world
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Water World
Life DetectedMagnetic FieldLow Activity
Why is this a Water World?Your planet has abundant oxygen (35.3%) and hydrogen (17.6%), creating extensive water coverage while in the habitable temperature zone.
Water worlds have deep global oceans covering most or all of their surface. They form when planets have high water content and orbit in the habitable zone.
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere40
Nitrogen-oxygen atmosphere - breathable and protective (partially stripped by slow rotation)
temperature75
Challenging but potentially habitable temperature (large moon stabilizes the axial tilt - steady seasons)
magnetic Field100
Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative)) — but the black hole's accretion disk bathes this orbit in hard X-ray radiation
Physical Properties
Mass
0.80x Earth (4.78e+24 kg)
Radius
0.93x Earth (5,914 km)
Surface Gravity
0.93x Earth (9.1 m/s²)
Surface Temperature
266 K (-8 °C / 18 °F)
Rotation Period
18.0 hours/day (faster than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
25.00 AU (3.74 billion km)
Orbital Period
39.5 years
Atmosphere
Nitrogen and oxygen with water vapor, mild greenhouse effect
Elemental Composition
O - Oxygen
35.3%
H - Hydrogen
17.6%
Si - Silicon
17.6%
Surface Characteristics
Vast oceans covering most of the surface, scattered islands or archipelagos
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2017 via transit · 40 light-years awaySource: NASA Exoplanet Archive
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 2rings0.010% - 4.3 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Moon 3receding0.010% - 7.5 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
Moon 4merged0.79% - 11.3 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
Moon 5rings0.010% - 2.0 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
+5 temperature: large moon stabilizes the axial tilt - steady seasons+10 geology: tidal flexing sustains geologic activity+5 magneticField: a large close moon may help stir the core dynamo (speculative)
Habitability
✓ Conditions suitable for life detectedThis planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.