🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.98

Radius: 1.55

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.108

Orbit Range: 0.49 AU - 0.61 AU

Year: 259 Days

Day: 24.4 Hours

Environment

Temp: -130 °C

Axial Tilt: 20.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 25,981,487 km

• M1: 38,447 km (0.103 R)
• M2: 469,737 km (0.068 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.59 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.98

Radius: 1.31

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.002

Orbit Range: 0.59 AU - 0.59 AU

Year: 288 Days

Day: 21.2 Hours

Environment

Temp: -136 °C

Axial Tilt: 17.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.19

Radius: 1.37

Gravity: 1.17 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 0.61 AU - 0.63 AU

Year: 310 Days

Day: 38.2 Hours

Environment

Temp: -130 °C

Axial Tilt: 1.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 807.2

Radius: 13.5

Gravity: 4.43 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 0.65 AU - 0.89 AU

Year: 430 Days

Day: 8.3 Hours

Environment

Temp: -144 °C

Axial Tilt: 23.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 25,981,487 km

• M1: 167,998 km (0.055 R)
• M2: 622,028 km (0.101 R)
• M3: 1,195,287 km (0.118 R)
• M4: 1,671,607 km (0.07 R)
• M5: 2,376,512 km (0.045 R)
• M6: 2,926,434 km (0.048 R)
• M7: 3,736,506 km (0.069 R)
• M8: 4,201,905 km (0.045 R)
• M9: 5,250,885 km (0.064 R)
• M10: 6,030,739 km (0.119 R)

Planet 5 - Gas Giant

Semi-Major Axis: 0.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 307.9

Radius: 11.1

Gravity: 2.5 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 0.7 AU - 1.08 AU

Year: 534 Days

Day: 12 Hours

Environment

Temp: -147 °C

Axial Tilt: 38.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 25,981,487 km

• M1: 138,827 km (0.074 R)
• M2: 569,669 km (0.097 R)
• M3: 918,381 km (0.104 R)
• M4: 1,288,337 km (0.089 R)
• M5: 2,142,092 km (0.054 R)
• M6: 3,261,234 km (0.109 R)
• M7: 3,783,330 km (0.069 R)
• M8: 4,849,514 km (0.1 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 867.2

Radius: 11.2

Gravity: 6.91 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 2.32 AU - 2.4 AU

Year: 2305 Days

Day: 5.7 Hours

Environment

Temp: -204 °C

Axial Tilt: 22.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 25,981,487 km

• M1: 140,921 km (0.111 R)
• M2: 582,684 km (0.08 R)
• M3: 976,276 km (0.057 R)
• M4: 1,406,070 km (0.065 R)
• M5: 1,938,489 km (0.075 R)
• M6: 2,430,367 km (0.108 R)
• M7: 2,956,054 km (0.112 R)
• M8: 3,630,292 km (0.1 R)
• M9: 4,554,208 km (0.056 R)
• M10: 5,553,372 km (0.114 R)
• M11: 6,012,937 km (0.091 R)
• M12: 6,608,785 km (0.045 R)
• M13: 7,154,817 km (0.088 R)
• M14: 7,982,393 km (0.031 R)
• M15: 11,817,185 km (0.115 R)
• M16: 13,509,885 km (0.089 R)
• M17: 14,296,321 km (0.088 R)
• M18: 14,724,769 km (0.117 R)
• M19: 15,408,281 km (0.079 R)
• M20: 16,011,011 km (0.1 R)
• M21: 17,749,638 km (0.114 R)
• M22: 18,749,400 km (0.056 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 659.1

Radius: 8.7

Gravity: 8.71 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 4.87 AU - 5.43 AU

Year: 7431 Days

Day: 5.9 Hours

Environment

Temp: -207 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 25,981,487 km

• M1: 108,159 km (0.065 R)
• M2: 604,226 km (0.094 R)
• M3: 1,072,018 km (0.113 R)
• M4: 1,840,203 km (0.064 R)
• M5: 2,232,599 km (0.12 R)
• M6: 2,935,709 km (0.106 R)
• M7: 3,851,996 km (0.111 R)
• M8: 4,153,286 km (0.105 R)
• M9: 6,690,765 km (0.09 R)
• M10: 7,315,635 km (0.113 R)
• M11: 7,858,825 km (0.069 R)
• M12: 11,544,767 km (0.042 R)
• M13: 12,120,868 km (0.084 R)
• M14: 12,826,222 km (0.111 R)
• M15: 17,304,883 km (0.043 R)
• M16: 20,758,799 km (0.082 R)
• M17: 21,925,962 km (0.11 R)
• M18: 24,475,857 km (0.055 R)
• M19: 26,671,206 km (0.045 R)
• M20: 28,803,873 km (0.035 R)
• M21: 33,721,903 km (0.097 R)
• M22: 35,114,809 km (0.06 R)
• M23: 36,657,462 km (0.119 R)

Planet 8 - Ice Giant

Semi-Major Axis: 6.26 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 110

Radius: 7.6

Gravity: 1.9 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 5.43 AU - 7.09 AU

Year: 9959 Days

Day: 24.5 Hours

Environment

Temp: -230 °C

Axial Tilt: 46.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 25,981,487 km

• M1: 94,695 km (0.098 R)
• M2: 565,480 km (0.114 R)
• M3: 6,234,342 km (0.043 R)
• M4: 6,536,679 km (0.072 R)
• M5: 7,435,912 km (0.104 R)
• M6: 8,162,658 km (0.06 R)
• M7: 17,082,431 km (0.091 R)
• M8: 19,666,585 km (0.119 R)
• M9: 25,136,631 km (0.085 R)
• M10: 25,903,918 km (0.105 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 303 - 19,309 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit