🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.47 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.94 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.76

Radius: 1.25

Gravity: 1.13 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 0.74 AU - 1.14 AU

Year: 319 Days

Day: 28.2 Hours

Environment

Temp: 181 °C

Axial Tilt: 32.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.27 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.4

Radius: 0.69

Gravity: 0.84 G

Time & Orbit

Eccentricity (e): 0.249

Orbit Range: 0.95 AU - 1.59 AU

Year: 501 Days

Day: 19.8 Hours

Environment

Temp: 14 °C

Axial Tilt: 24 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 3 - Terrestrial

Semi-Major Axis: 1.57 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.27

Radius: 1.1

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.206

Orbit Range: 1.25 AU - 1.89 AU

Year: 688 Days

Day: 25.8 Hours

Environment

Temp: -18 °C

Axial Tilt: 75.2 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Planet 4 - Terrestrial

Semi-Major Axis: 1.88 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.56

Radius: 1.46

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 1.78 AU - 1.98 AU

Year: 902 Days

Day: 40.9 Hours

Environment

Temp: -50 °C

Axial Tilt: 39.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 81,665,742 km

• M1: 160,219 km (0.079 R)

Planet 5 - Terrestrial

Semi-Major Axis: 2.78 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.26

Radius: 0.58

Gravity: 0.77 G

Time & Orbit

Eccentricity (e): 0.241

Orbit Range: 2.11 AU - 3.45 AU

Year: 1622 Days

Day: 22.4 Hours

Environment

Temp: -89 °C

Axial Tilt: 37.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Terrestrial

Semi-Major Axis: 2.83 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.84

Radius: 0.93

Gravity: 0.97 G

Time & Orbit

Eccentricity (e): 0.229

Orbit Range: 2.18 AU - 3.48 AU

Year: 1666 Days

Day: 37.3 Hours

Environment

Temp: -93 °C

Axial Tilt: 31.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 7 - Terrestrial

Semi-Major Axis: 3.09 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.31

Radius: 1.61

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.174

Orbit Range: 2.55 AU - 3.63 AU

Year: 1900 Days

Day: 45.4 Hours

Environment

Temp: -88 °C

Axial Tilt: 20.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 81,665,742 km

• M1: 726,597 km (0.099 R)

Asteroid Belt

Center: 8 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 8 - Gas Giant

Semi-Major Axis: 12.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 138.6

Radius: 8.2

Gravity: 2.06 G

Time & Orbit

Eccentricity (e): 0.049

Orbit Range: 12.28 AU - 13.54 AU

Year: 16228 Days

Day: 5.4 Hours

Environment

Temp: -171 °C

Axial Tilt: 2.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 81,665,742 km

• M1: 102,774 km (0.094 R)
• M2: 481,855 km (0.043 R)
• M3: 881,879 km (0.067 R)
• M4: 1,408,015 km (0.076 R)
• M5: 3,899,119 km (0.059 R)
• M6: 6,341,603 km (0.081 R)
• M7: 8,813,110 km (0.114 R)
• M8: 12,779,099 km (0.073 R)
• M9: 13,915,295 km (0.106 R)
• M10: 17,934,541 km (0.058 R)
• M11: 19,429,622 km (0.06 R)
• M12: 32,293,692 km (0.089 R)
• M13: 37,367,903 km (0.108 R)

Planet 9 - Ice Giant

Semi-Major Axis: 20.82 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 306.7

Radius: 5.6

Gravity: 9.78 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 18.22 AU - 23.42 AU

Year: 33235 Days

Day: 23.6 Hours

Environment

Temp: -187 °C

Axial Tilt: 0.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (29)

Outer Limit: 81,665,742 km

• M1: 72,106 km (0.093 R)
• M2: 537,655 km (0.067 R)
• M3: 880,533 km (0.114 R)
• M4: 2,949,023 km (0.11 R)
• M5: 3,248,518 km (0.078 R)
• M6: 4,947,202 km (0.056 R)
• M7: 5,291,725 km (0.093 R)
• M8: 7,067,751 km (0.111 R)
• M9: 7,406,441 km (0.099 R)
• M10: 8,704,502 km (0.094 R)
• M11: 11,021,324 km (0.045 R)
• M12: 11,279,979 km (0.092 R)
• M13: 12,564,426 km (0.055 R)
• M14: 12,846,867 km (0.116 R)
• M15: 15,340,364 km (0.098 R)
• M16: 17,960,122 km (0.075 R)
• M17: 18,318,558 km (0.068 R)
• M18: 23,634,968 km (0.051 R)
• M19: 25,613,100 km (0.106 R)
• M20: 28,905,151 km (0.115 R)
• M21: 30,525,296 km (0.097 R)
• M22: 35,186,018 km (0.047 R)
• M23: 38,494,075 km (0.081 R)
• M24: 47,744,310 km (0.086 R)
• M25: 52,332,327 km (0.115 R)
• M26: 68,493,086 km (0.102 R)
• M27: 70,470,919 km (0.097 R)
• M28: 76,632,407 km (0.039 R)
• M29: 77,102,593 km (0.103 R)

Kuiper Belt

Range: 31.4 - 55.4 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 460 - 20,231 AU

Composition

Type: Cometary Reservoir

System's final boundary, containing trillions of icy planetesimals.

Gravitational Limit