🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.64 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.33

Radius: 1.8

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 0.6 AU - 0.68 AU

Year: 336 Days

Day: 25.3 Hours

Environment

Temp: -123 °C

Axial Tilt: 16.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 908.5

Radius: 13.3

Gravity: 5.14 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 0.58 AU - 0.86 AU

Year: 401 Days

Day: 9.6 Hours

Environment

Temp: -150 °C

Axial Tilt: 25.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 21,923,872 km

• M1: 165,455 km (0.077 R)
• M2: 626,217 km (0.101 R)
• M3: 1,089,671 km (0.093 R)
• M4: 1,595,910 km (0.058 R)
• M5: 2,069,387 km (0.084 R)
• M6: 2,821,117 km (0.044 R)
• M7: 3,609,797 km (0.098 R)
• M8: 4,117,831 km (0.078 R)
• M9: 4,599,686 km (0.102 R)
• M10: 5,166,662 km (0.11 R)
• M11: 6,095,814 km (0.044 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 937.1

Radius: 13.8

Gravity: 4.92 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 0.85 AU - 1.15 AU

Year: 656 Days

Day: 13.6 Hours

Environment

Temp: -164 °C

Axial Tilt: 24.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 21,923,872 km

• M1: 171,888 km (0.117 R)
• M2: 615,446 km (0.042 R)
• M3: 1,104,032 km (0.084 R)
• M4: 1,598,453 km (0.091 R)
• M5: 3,044,167 km (0.103 R)
• M6: 3,837,185 km (0.095 R)
• M7: 5,913,604 km (0.082 R)
• M8: 6,756,139 km (0.098 R)
• M9: 7,700,700 km (0.081 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 34.7

Radius: 12.2

Gravity: 0.23 G

Time & Orbit

Eccentricity (e): 0.191

Orbit Range: 0.9 AU - 1.32 AU

Year: 767 Days

Day: 8.2 Hours

Environment

Temp: -155 °C

Axial Tilt: 18.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 21,923,872 km

• M1: 152,141 km (0.097 R)
• M2: 1,106,575 km (0.12 R)
• M3: 1,560,755 km (0.04 R)
• M4: 1,985,613 km (0.111 R)
• M5: 2,685,431 km (0.095 R)
• M6: 3,084,708 km (0.041 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 309.1

Radius: 13.7

Gravity: 1.65 G

Time & Orbit

Eccentricity (e): 0.122

Orbit Range: 1.69 AU - 2.17 AU

Year: 1759 Days

Day: 10.9 Hours

Environment

Temp: -194 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 21,923,872 km

• M1: 170,691 km (0.091 R)
• M2: 829,520 km (0.06 R)
• M3: 1,366,128 km (0.114 R)
• M4: 2,482,128 km (0.116 R)
• M5: 2,973,258 km (0.113 R)
• M6: 3,469,324 km (0.08 R)
• M7: 4,087,463 km (0.109 R)
• M8: 5,566,686 km (0.045 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.58 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 964.4

Radius: 12.2

Gravity: 6.48 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 2.1 AU - 3.06 AU

Year: 2719 Days

Day: 7.8 Hours

Environment

Temp: -191 °C

Axial Tilt: 25 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 21,923,872 km

• M1: 176,226 km (0.038 R)
• M2: 3,523,479 km (0.099 R)
• M3: 4,386,658 km (0.087 R)
• M4: 5,724,512 km (0.108 R)
• M5: 6,188,565 km (0.111 R)
• M6: 6,766,910 km (0.075 R)
• M7: 8,405,904 km (0.117 R)
• M8: 8,898,829 km (0.092 R)
• M9: 9,750,789 km (0.06 R)
• M10: 10,984,074 km (0.111 R)
• M11: 14,948,567 km (0.073 R)
• M12: 15,726,327 km (0.099 R)
• M13: 16,805,077 km (0.089 R)
• M14: 18,632,714 km (0.093 R)
• M15: 19,655,814 km (0.064 R)
• M16: 20,087,852 km (0.09 R)
• M17: 20,716,014 km (0.1 R)

Asteroid Belt

Center: 3.48 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 7 - Gas Giant

Semi-Major Axis: 4.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 61.4

Radius: 9.3

Gravity: 0.71 G

Time & Orbit

Eccentricity (e): 0.053

Orbit Range: 4.14 AU - 4.6 AU

Year: 5993 Days

Day: 14.8 Hours

Environment

Temp: -215 °C

Axial Tilt: 7.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 21,923,872 km

• M1: 122,072 km (0.078 R)
• M2: 488,587 km (0.099 R)
• M3: 1,006,345 km (0.064 R)
• M4: 6,050,935 km (0.079 R)
• M5: 6,811,041 km (0.106 R)
• M6: 7,519,986 km (0.095 R)
• M7: 9,707,107 km (0.109 R)

Planet 8 - Ice Giant

Semi-Major Axis: 6.55 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 54.2

Radius: 5.2

Gravity: 2 G

Time & Orbit

Eccentricity (e): 0.152

Orbit Range: 5.55 AU - 7.55 AU

Year: 10997 Days

Day: 17.9 Hours

Environment

Temp: -226 °C

Axial Tilt: 23.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 21,923,872 km

• M1: 64,776 km (0.106 R)
• M2: 278,850 km (0.105 R)
• M3: 457,769 km (0.07 R)
• M4: 850,165 km (0.12 R)
• M5: 1,093,112 km (0.038 R)
• M6: 1,627,026 km (0.105 R)
• M7: 2,096,764 km (0.05 R)
• M8: 2,305,303 km (0.062 R)
• M9: 2,620,655 km (0.115 R)
• M10: 4,028,222 km (0.042 R)
• M11: 6,235,538 km (0.028 R)
• M12: 6,998,787 km (0.117 R)
• M13: 8,994,572 km (0.076 R)
• M14: 10,517,927 km (0.068 R)
• M15: 11,256,641 km (0.093 R)
• M16: 11,681,499 km (0.108 R)
• M17: 16,320,828 km (0.089 R)
• M18: 17,534,067 km (0.069 R)
• M19: 19,343,902 km (0.069 R)

Kuiper Belt

Range: 30 - 60 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 268 - 18,592 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit