Why is this a Barren?Your planet has an unusual composition that doesn't fit standard classifications, or lacks the elements needed for complex geological processes.
Barren worlds can form from uncommon element combinations or may be remnants of larger bodies that lost their atmospheres and volatile materials.
Classification Criteria:
Composition doesn't match standard planet typesMass: 6.7x EarthTemperature: 175K
Habitability ScoreUninhabitable
0
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it
geology40
Extreme volcanic activity may be hazardous
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry54
Carbon and hydrogen present - organic chemistry possible (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere16
Atmosphere present but composition not ideal for life (partially stripped by slow rotation)
temperature25
Very cold - water frozen, challenging for life (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))
Physical Properties
Mass
6.70x Earth (4.00e+25 kg)
Radius
1.89x Earth (12,011 km)
Surface Gravity
1.89x Earth (18.5 m/s²)
Surface Temperature
175 K (-98 °C / -144 °F)
Rotation Period
28.0 hours/day (slower than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
50.20 AU (7.51 billion km)
Orbital Period
112.5 years
Atmosphere
Thin trace-gas atmosphere
Elemental Composition
He - Helium
40.9%
S - Sulfur
34.1%
H - Hydrogen
20.5%
Surface Characteristics
Barren rocky surface with unusual elemental composition
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2017 via transit · 49 light-years awaySource: NASA Exoplanet Archive
Inside the Roche limit (1.92 planet radii): torn apart into a ring system.
Moon 2recedingOcean world1.0% - 16.5 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
A thin tidal-warmed subsurface ocean may exist, but conditions are marginal (11/100).
+5 temperature: large moon stabilizes the axial tilt - steady seasons+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry+5 magneticField: a large close moon may help stir the core dynamo (speculative)