Habitability
0/ 100
Uninhabitable

Gargantua Gas Giant

by Stargazer
0
Magnetic FieldExtreme Activity
Why is this a Gas Giant?Your planet has 94.7% hydrogen and helium, combined with a mass of 10.1x 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: 94.7% (>60% required)✓ Mass: 10.1x Earth (>10x required)
Habitability ScoreUninhabitable
0
Contributing Factors
water20
Very dry - minimal water
geology40
Extreme volcanic activity may be hazardous
rotation65
Slow rotation - significant day/night temperature variations, but life can adapt
Organic Chemistry50
Carbon and hydrogen present - organic chemistry possible
atmosphere30
Hydrogen-rich atmosphere typical of gas giants
temperature0
Near absolute zero - all molecular activity ceases, impossible for life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
10.10x Earth (6.03e+25 kg)
Radius
2.16x Earth (13,772 km)
This planet: 2.16× Earth radiusEarth: 1× (baseline)
Surface Gravity
2.16x Earth (21.2 m/s²)
Surface Temperature
23 K (-250 °C / -419 °F)
Rotation Period
48.0 hours/day (slower than Earth)
This planet: 48 h/dayEarth: 24 h/day

Orbital Environment

Star Type
BH-type (Black Hole)
Distance from Star
3000.00 AU (449 billion km)

Atmosphere

Hydrogen and helium dominated with trace methane and ammonia

Elemental Composition

H - Hydrogen
57.9%
He - Helium
36.8%
C - Carbon
3.2%

Surface Characteristics

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

Closest Real Exoplanet

TIC 390586021 b70% similar
Orbiting TIC 390586021
YoursTIC 390586021 b
Mass10.1 × Earth8.55 × Earth
Radius2.16 × Earth2.86 × Earth
Temperature22.7 K
Starlight received0.00 × Earth
Star temperature 4,435 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2026 via transit · 375 light-years awaySource: NASA Exoplanet Archive