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: 0.4x EarthTemperature: 281K
Habitability ScoreExtremely Harsh
37
Contributing Factors
water61
Good water content (low gravity lets water escape to space)
geology90
Active geology recycles nutrients and drives carbon cycle
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry75
All CHNOPS elements present - building blocks of life - chlorine-laced environment attacks organic molecules — but the ground itself is radioactive, and no magnetic field shields a world from its own crust
atmosphere28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature100
Optimal temperature range for liquid water and life (large moon stabilizes the axial tilt - steady seasons)
magnetic Field35
No magnetic field - vulnerable to solar radiation (a large close moon may help stir the core dynamo (speculative))
Physical Properties
Mass
0.40x Earth (2.39e+24 kg)
Radius
0.74x Earth (4,694 km)
Surface Gravity
0.74x Earth (7.2 m/s²)
Surface Temperature
281 K (8 °C / 46 °F)
Rotation Period
25.0 hours/day (slower than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
1.15 AU (172 million km)
Orbital Period
1.23 years
Atmosphere
Thin CO₂ and nitrogen atmosphere
Elemental Composition
O - Oxygen
11.6%
Cl - Chlorine
10.6%
He - Helium
10.6%
Surface Characteristics
Barren rocky surface with unusual elemental composition
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
+5 temperature: large moon stabilizes the axial tilt - steady seasons+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.