Magnetic Field High Activity
Why is this a Rocky Terrestrial? Your planet is dominated by silicate (3.5%) and iron (28.3%) content, forming a rocky terrestrial body. Rocky terrestrial planets are primarily composed of silicate rocks and metals. They're the most common type of small planet in the universe.
✓ Silicon: 3.5% + Iron: 28.3% + Magnesium: 0.0% ✓ Mass: 4.0x Earth (terrestrial range)
Habitability Score Uninhabitable
Contributing Factors water 14
Very dry - minimal water - likely as steam geology 90
Active geology recycles nutrients and drives carbon cycle rotation 65
Slow rotation - significant day/night temperature variations, but life can adapt Organic Chemistry 20
Limited organic chemistry potential atmosphere 10
No atmosphere - exposed to radiation and temperature extremes temperature 15
Extremely hot - hostile to known life forms magnetic Field 100
Magnetic field provides radiation protection — but the black hole's accretion disk bathes this orbit in hard X-ray radiation Physical Properties Mass
4.00x Earth (2.39e+25 kg) Radius
1.59x Earth (10,113 km) This planet: 1.59× Earth radius Earth: 1× (baseline)
Surface Gravity
1.59x Earth (15.6 m/s²) Surface Temperature
454 K (181 °C / 358 °F) Rotation Period
76.0 hours/day (slower than Earth) This planet: 76 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
7.49 AU (1.12 billion km) Atmosphere Minimal or none
Surface Characteristics Rocky surface with impact craters, possible volcanic features Closest Real Exoplanet Orbiting TOI-198 Yours TOI-198 b Mass 4.00 × Earth 3.17 × Earth Radius 1.47 × Earth 1.36 × Earth Density (composition) 6.90 g/cm³ 6.94 g/cm³ Temperature 454.3 K 456.0 K Starlight received 7.13 × Earth 7.20 × Earth Star temperature — 3,801 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2023 via transit · 77 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets