Largian
Gas Dwarf
Magnetic FieldLow Activity
Why is this a Gas Dwarf?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: 4.5x EarthTemperature: 258K
Habitability ScoreMarginal
Contributing Factors
water60
Water present but mostly frozen
geology60
Some geological activity provides slow nutrient cycling
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry20
Limited organic chemistry potential
atmosphere12
Hydrogen-rich atmosphere typical of gas giants (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
Physical Properties
Mass
4.50x Earth (2.69e+25 kg)Radius
1.65x Earth (10518 km)Surface Gravity
1.65x Earth (16.2 m/s²)Surface Temperature
258 K (-15 °C / 5 °F)Rotation Period
23.0 hours/day (faster than Earth)Orbital Environment
Star Type
F-type (White)Distance from Star
2.84 AU (424857953 million km)Atmosphere
Deep hydrogen-helium envelope with photochemical haze
Elemental Composition
H - Hydrogen
44.4%
He - Helium
27.8%
Ar - Argon
16.7%
Surface Characteristics
No solid surface - a thick gas envelope wrapped around a small deep core (a mini-Neptune)Moons
Moon 1receding0.63% - 11.3 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 2rings10% - 1.8 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.