Life Detected Magnetic Field Low Activity
Why is this a Rocky Terrestrial? Your planet is dominated by silicate (25.0%) and iron (12.5%) 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: 25.0% + Iron: 12.5% + Magnesium: 3.8% ✓ Mass: 0.5x Earth (terrestrial range)
Habitability Score Marginal
Contributing Factors water 39
Limited water content (low gravity lets water escape to space) geology 60
Some geological activity provides slow nutrient cycling rotation 10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only Organic Chemistry 84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry) atmosphere 28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation) temperature 100
Optimal temperature range for liquid water and life magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
0.50x Earth (2.99e+24 kg) Radius
0.79x Earth (5,057 km) This planet: 0.79× Earth radius Earth: 1× (baseline)
Surface Gravity
0.79x Earth (7.8 m/s²) Surface Temperature
290 K (17 °C / 62 °F) Rotation Period
15.0 hours/day (faster than Earth) This planet: 15 h/day Earth: 24 h/day Orbital Environment Star Type
A-type (Blue-White) Distance from Star
5.94 AU (889 million km) Atmosphere Thin CO₂ and nitrogen atmosphere
Surface Characteristics Rocky surface with impact craters, possible volcanic features Closest Real Exoplanet Orbiting Kepler-138 Yours Kepler-138 e Mass 0.50 × Earth 0.43 × Earth Radius 0.84 × Earth 0.80 × Earth Density (composition) 4.65 g/cm³ 4.68 g/cm³ Temperature 289.8 K 292.0 K Starlight received 1.13 × Earth 1.73 × Earth Star temperature 8,750 K 3,841 K
Discovered 2022 via transit timing variations · 218 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons
Moon 1 receding 0.079% - 7.4 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry
Habitability ✓ Conditions suitable for life detected This planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.