🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.33 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.97

Radius: 1.31

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.156

Orbit Range: 0.55 AU - 0.75 AU

Year: 338 Days

Day: 47.8 Hours

Environment

Temp: -135 °C

Axial Tilt: 34.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.7 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 31.6

Radius: 14.9

Gravity: 0.14 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 0.68 AU - 0.72 AU

Year: 378 Days

Day: 12.9 Hours

Environment

Temp: -140 °C

Axial Tilt: 11.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (4)

Outer Limit: 45,697,752 km

• M1: 185,352 km (0.106 R)
• M2: 788,680 km (0.118 R)
• M3: 1,264,700 km (0.109 R)
• M4: 1,773,932 km (0.07 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 271.4

Radius: 13

Gravity: 1.61 G

Time & Orbit

Eccentricity (e): 0.059

Orbit Range: 0.81 AU - 0.91 AU

Year: 515 Days

Day: 10 Hours

Environment

Temp: -141 °C

Axial Tilt: 9.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 45,697,752 km

• M1: 172,187 km (0.076 R)
• M2: 635,342 km (0.069 R)
• M3: 1,220,569 km (0.105 R)
• M4: 1,898,247 km (0.107 R)
• M5: 2,582,807 km (0.105 R)
• M6: 3,004,224 km (0.073 R)
• M7: 3,460,498 km (0.076 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.11 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 452.3

Radius: 9.5

Gravity: 5.01 G

Time & Orbit

Eccentricity (e): 0.222

Orbit Range: 0.86 AU - 1.36 AU

Year: 755 Days

Day: 9.1 Hours

Environment

Temp: -166 °C

Axial Tilt: 37 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 45,697,752 km

• M1: 118,182 km (0.105 R)
• M2: 422,165 km (0.116 R)
• M3: 756,217 km (0.083 R)
• M4: 1,572,274 km (0.075 R)
• M5: 1,884,036 km (0.103 R)
• M6: 2,295,729 km (0.11 R)
• M7: 3,989,326 km (0.104 R)
• M8: 4,452,182 km (0.036 R)
• M9: 4,851,309 km (0.035 R)
• M10: 7,088,695 km (0.094 R)
• M11: 7,434,715 km (0.082 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.31 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 668.9

Radius: 13.4

Gravity: 3.73 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 1.27 AU - 1.35 AU

Year: 968 Days

Day: 12.6 Hours

Environment

Temp: -173 °C

Axial Tilt: 101.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 45,697,752 km

• M1: 171,888 km (0.097 R)
• M2: 666,010 km (0.034 R)
• M3: 1,229,994 km (0.11 R)
• M4: 1,736,532 km (0.093 R)
• M5: 2,775,639 km (0.028 R)
• M6: 3,294,295 km (0.044 R)
• M7: 3,770,614 km (0.1 R)
• M8: 4,243,493 km (0.044 R)
• M9: 4,667,902 km (0.112 R)
• M10: 5,252,680 km (0.095 R)
• M11: 6,115,411 km (0.107 R)
• M12: 6,862,802 km (0.115 R)
• M13: 7,402,252 km (0.116 R)
• M14: 8,122,865 km (0.119 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 555.8

Radius: 14.4

Gravity: 2.68 G

Time & Orbit

Eccentricity (e): 0.012

Orbit Range: 2.53 AU - 2.59 AU

Year: 2645 Days

Day: 9 Hours

Environment

Temp: -201 °C

Axial Tilt: 6.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 45,697,752 km

• M1: 180,116 km (0.087 R)
• M2: 908,807 km (0.114 R)
• M3: 1,501,813 km (0.085 R)
• M4: 1,954,646 km (0.048 R)
• M5: 2,486,616 km (0.04 R)
• M6: 3,399,761 km (0.079 R)
• M7: 3,887,450 km (0.105 R)
• M8: 4,526,383 km (0.12 R)
• M9: 5,399,586 km (0.082 R)
• M10: 6,276,229 km (0.049 R)
• M11: 6,846,646 km (0.098 R)
• M12: 8,571,808 km (0.11 R)
• M13: 14,290,785 km (0.057 R)
• M14: 15,769,112 km (0.086 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 56.6

Radius: 13.8

Gravity: 0.3 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 2.74 AU - 3.2 AU

Year: 3305 Days

Day: 5 Hours

Environment

Temp: -200 °C

Axial Tilt: 31.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 45,697,752 km

• M1: 172,636 km (0.1 R)
• M2: 684,709 km (0.105 R)
• M3: 1,304,493 km (0.058 R)
• M4: 2,902,647 km (0.083 R)
• M5: 3,878,325 km (0.057 R)
• M6: 4,631,849 km (0.076 R)
• M7: 5,658,839 km (0.081 R)
• M8: 6,131,269 km (0.088 R)
• M9: 8,086,064 km (0.113 R)
• M10: 8,957,920 km (0.096 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 846.5

Radius: 13.3

Gravity: 4.79 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 4.79 AU - 6.25 AU

Year: 8374 Days

Day: 10.1 Hours

Environment

Temp: -222 °C

Axial Tilt: 45.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 45,697,752 km

• M1: 172,187 km (0.084 R)
• M2: 2,168,272 km (0.096 R)
• M3: 2,866,295 km (0.09 R)
• M4: 3,349,646 km (0.108 R)
• M5: 4,862,529 km (0.112 R)
• M6: 7,455,210 km (0.119 R)
• M7: 9,281,052 km (0.062 R)
• M8: 10,756,536 km (0.097 R)
• M9: 11,228,367 km (0.091 R)
• M10: 11,768,864 km (0.091 R)
• M11: 13,435,086 km (0.088 R)
• M12: 14,168,714 km (0.068 R)
• M13: 19,068,642 km (0.03 R)
• M14: 19,528,506 km (0.108 R)
• M15: 21,524,441 km (0.119 R)
• M16: 22,699,981 km (0.059 R)
• M17: 25,087,264 km (0.067 R)
• M18: 29,942,313 km (0.038 R)
• M19: 35,160,436 km (0.105 R)
• M20: 45,153,574 km (0.104 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 546 - 11,460 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit