Magnetic Field Extreme Activity
Why is this a Gas Giant? Your planet has 52.8% hydrogen and helium, combined with a mass of 20.0x 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.
✓ Hydrogen + Helium: 52.8% (>60% required) ✓ Mass: 20.0x Earth (>10x required)
Habitability Score Uninhabitable
Contributing Factors water 15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans geology 40
Extreme volcanic activity may be hazardous rotation 10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only Organic Chemistry 55
Core organic elements (CHNO) present - chlorine-laced environment attacks organic molecules atmosphere 12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation) temperature 5
Near absolute zero - all molecular activity ceases, impossible for life (large moon stabilizes the axial tilt - steady seasons) magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
20.00x Earth (1.19e+26 kg) Radius
2.71x Earth (17,294 km) This planet: 2.71× Earth radius Earth: 1× (baseline)
Surface Gravity
2.71x Earth (26.6 m/s²) Surface Temperature
25 K (-248 °C / -414 °F) Rotation Period
12.0 hours/day (faster than Earth) This planet: 12 h/day Earth: 24 h/day Orbital Environment Star Type
NS-type (Neutron Star) Distance from Star
14.00 AU (2.09 billion km) Atmosphere Hydrogen and helium dominated with trace methane and ammonia
Surface Characteristics No solid surface - thick gaseous envelope with possible rocky core deep within Closest Real Exoplanet Orbiting KMT-2021-BLG-0171L Yours KMT-2021-BLG-0171L b Mass 20.0 × Earth 11.2 × Earth Radius 4.39 × Earth 3.35 × Earth Density (composition) 1.30 g/cm³ 1.64 g/cm³ Temperature 25.5 K — Starlight received 0.00 × Earth — Star temperature — 5,200 K
Matched on physical properties only — but pulsar planets are real: the first exoplanets ever confirmed (PSR B1257+12, 1992) orbit a neutron star. Discovered 2022 via microlensing · 15,003 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons Life may exist on a moon
Moon 1 rings 0.050% - 2.0 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Moon 2 receding Ocean world - life 0.50% - 9.9 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
Tidal heat sustains a subsurface ocean over a rock seafloor: a strong candidate for life (Europa-like, 85/100).
Moon 3 stable 0.011% - 70.0 radii
Small and distant: a quiet, stable companion.
+5 temperature: large moon stabilizes the axial tilt - steady seasons