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: 406K
Habitability ScoreExtremely Harsh
21
Contributing Factors
water59
Abundant water - likely as steam (low gravity lets water escape to space)
geology60
Some geological activity provides slow nutrient cycling
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry100
All CHNOPS elements present - building blocks of life (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature15
Extremely hot - hostile to known life forms
magnetic Field30
No magnetic field - vulnerable to solar radiation
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
406 K (133 °C / 271 °F)
Rotation Period
17.0 hours/day (faster than Earth)
Orbital Environment
Star Type
F-type (White)
Distance from Star
1.21 AU (181 million km)
Orbital Period
1.17 years
Atmosphere
Thin CO₂ and nitrogen atmosphere
Elemental Composition
O - Oxygen
19.4%
H - Hydrogen
17.0%
Si - Silicon
17.0%
Surface Characteristics
Barren rocky surface with unusual elemental composition