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Entering orbit…
Habitability
40/ 100
Marginal

HD-100 546b

0

Gas Giant

Magnetic FieldExtreme Activity
Why is this a Gas Giant?Your planet has 84.9% hydrogen and helium, combined with a mass of 1838.0x Earth, which exceeds the gas giant threshold.
Gas giants form when massive cores capture enormous atmospheres of light gases. They typically form beyond the 'frost line' where volatiles can condense.
Classification Criteria:
✓ Hydrogen + Helium: 84.9% (>60% required)✓ Mass: 1838.0x Earth (>10x required)
Habitability ScoreMarginal
40
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology40
Extreme volcanic activity may be hazardous
rotation25
Very fast rotation - perpetual hurricane-force winds, extreme Coriolis effects, hazardous for complex life
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere30
Hydrogen-rich atmosphere typical of gas giants
temperature40
Extreme temperature - very difficult for life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
1838.00x Earth (1.10e+28 kg)
Radius
12.25x Earth (78,041 km)
This planet: 12.25× Earth radiusEarth: 1× (baseline)
Surface Gravity
12.25x Earth (120.2 m/s²)
Surface Temperature
364 K (91 °C / 195 °F)
Rotation Period
4.0 hours/day (faster than Earth)
This planet: 4 h/dayEarth: 24 h/day

Orbital Environment

Star Type
B-type (Blue Giant)
Distance from Star
58.40 AU (8.74 billion km)
Orbital Period
141.1 years

Atmosphere

Hydrogen and helium dominated with trace methane and ammonia

Elemental Composition

H - Hydrogen
75.5%
He - Helium
9.4%
O - Oxygen
4.7%

Surface Characteristics

No solid surface - thick gaseous envelope with possible rocky core deep within

Closest Real Exoplanet

NY Vir b72% similar
Orbiting NY Vir
YoursNY Vir b
Mass1,838 × Earth731.0 × Earth
Radius19.8 × Earth13.3 × Earth
Density (composition)1.30 g/cm³1.71 g/cm³
Temperature363.8 K338.0 K
Starlight received2.93 × Earth2.18 × Earth
Star temperature20,000 K32,780 K
Discovered 2011 via eclipse timing variations · 1,774 light-years awaySource: NASA Exoplanet Archive
Surface views from three worlds: rocky ground under a ringed sky, a cloud deck, and a lit desert

New: Stand on Your World 🏔️

Every planet you build can now be seen from the ground. The terrain, the color of the sky, the weather and what hangs overhead are all read from the same numbers that shape the globe — so a thin-aired world gives you sunlit rock under a near-black sky crowded with stars, a runaway greenhouse seals you under an unbroken sulfur lid, and a gas giant leaves you in the cloud tops with nothing solid beneath you at all. If one of your moons wandered inside the Roche limit, what is left of it arcs overhead as rings.

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