Habitability
12/ 100
Uninhabitable

Hilyas

0

Rocky Terrestrial

Low Activity
Why is this a Rocky Terrestrial?Your planet is dominated by silicate (31.8%) and iron (29.5%) 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.
Classification Criteria:
✓ Silicon: 31.8% + Iron: 29.5% + Magnesium: 11.4%✓ Mass: 0.4x Earth (terrestrial range)
Habitability ScoreUninhabitable
12
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it
geology60
Some geological activity provides slow nutrient cycling
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry20
Limited organic chemistry potential
atmosphere28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature40
Extreme temperature - very difficult for life
magnetic Field30
No magnetic field - vulnerable to solar radiation

Physical Properties

Mass
0.40x Earth (2.39e+24 kg)
Radius
0.74x Earth (4,694 km)
This planet: 0.74× Earth radiusEarth: 1× (baseline)
Surface Gravity
0.74x Earth (7.2 m/s²)
Surface Temperature
227 K (-46 °C / -51 °F)
Rotation Period
25.0 hours/day (slower than Earth)
This planet: 25 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
1.50 AU (224 million km)

Atmosphere

Thin CO₂ and nitrogen atmosphere

Elemental Composition

Si - Silicon
31.8%
Fe - Iron
29.5%
O - Oxygen
13.6%

Surface Characteristics

Rocky surface with impact craters, possible volcanic features

Closest Real Exoplanet

TRAPPIST-1 e76% similar
Orbiting TRAPPIST-1
YoursTRAPPIST-1 e
Mass0.40 × Earth0.69 × Earth
Radius0.74 × Earth0.92 × Earth
Temperature227.0 K250.0 K
Starlight received0.44 × Earth0.65 × Earth
Star temperature5,600 K2,566 K
Discovered 2017 via transit · 40 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings0.36% - 2.8 radii

Inside the Roche limit (2.80 planet radii): torn apart into a ring system.

Moon 2receding0.10% - 11.3 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