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: 4.4x EarthTemperature: 279K
Habitability ScoreExtremely Harsh
25
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology60
Some geological activity provides slow nutrient cycling
rotation30
Very slow rotation - extreme temperature swings between eternal day and night sides
Organic Chemistry54
Carbon and hydrogen present - organic chemistry possible (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere18
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)
temperature100
Optimal temperature range for liquid water and life
magnetic Field100
Magnetic field provides radiation protection
Physical Properties
Mass
4.40x Earth (2.63e+25 kg)
Radius
1.64x Earth (10,440 km)
Surface Gravity
1.64x Earth (16.1 m/s²)
Surface Temperature
279 K (6 °C / 43 °F)
Rotation Period
39.0 hours/day (slower than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
0.99 AU (148 million km)
Orbital Period
360 days
Atmosphere
Deep hydrogen-helium envelope with photochemical haze
Elemental Composition
H - Hydrogen
89.3%
S - Sulfur
4.5%
He - Helium
4.5%
Surface Characteristics
No solid surface - a thick gas envelope wrapped around a small deep core (a mini-Neptune)