🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.26 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.08

Radius: 1.03

Gravity: 1.02 G

Time & Orbit

Eccentricity (e): 0.048

Orbit Range: 0.49 AU - 0.53 AU

Year: 235 Days

Day: 25.6 Hours

Environment

Temp: -121 °C

Axial Tilt: 26.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 71,572,600 km

• M1: 252,072 km (0.09 R)
• M2: 280,346 km (0.062 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.08

Radius: 1.34

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.079

Orbit Range: 0.61 AU - 0.71 AU

Year: 346 Days

Day: 27.6 Hours

Environment

Temp: -137 °C

Axial Tilt: 38.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 71,572,600 km

• M1: 34,557 km (0.108 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 984.7

Radius: 10.5

Gravity: 8.93 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 0.62 AU - 0.82 AU

Year: 394 Days

Day: 12.8 Hours

Environment

Temp: -133 °C

Axial Tilt: 1.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 71,572,600 km

• M1: 130,749 km (0.08 R)
• M2: 704,905 km (0.062 R)
• M3: 1,140,684 km (0.054 R)
• M4: 1,476,381 km (0.101 R)
• M5: 1,824,047 km (0.119 R)
• M6: 2,402,542 km (0.045 R)
• M7: 2,932,866 km (0.103 R)
• M8: 3,691,327 km (0.084 R)
• M9: 4,802,092 km (0.046 R)
• M10: 5,343,636 km (0.113 R)
• M11: 5,819,806 km (0.029 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 676.5

Radius: 14.3

Gravity: 3.31 G

Time & Orbit

Eccentricity (e): 0.155

Orbit Range: 1.01 AU - 1.39 AU

Year: 849 Days

Day: 7 Hours

Environment

Temp: -160 °C

Axial Tilt: 26 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 71,572,600 km

• M1: 177,872 km (0.058 R)
• M2: 701,913 km (0.111 R)
• M3: 1,222,065 km (0.066 R)
• M4: 2,660,748 km (0.054 R)
• M5: 3,265,722 km (0.096 R)
• M6: 4,022,687 km (0.12 R)
• M7: 4,618,535 km (0.083 R)
• M8: 5,090,217 km (0.072 R)
• M9: 5,536,617 km (0.118 R)
• M10: 6,131,418 km (0.034 R)
• M11: 6,659,648 km (0.061 R)
• M12: 8,077,238 km (0.05 R)
• M13: 8,635,387 km (0.114 R)
• M14: 9,191,892 km (0.071 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 654.2

Radius: 13

Gravity: 3.87 G

Time & Orbit

Eccentricity (e): 0.232

Orbit Range: 1.14 AU - 1.82 AU

Year: 1163 Days

Day: 8.6 Hours

Environment

Temp: -175 °C

Axial Tilt: 2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 71,572,600 km

• M1: 161,715 km (0.03 R)
• M2: 674,387 km (0.106 R)
• M3: 1,118,693 km (0.037 R)
• M4: 1,563,597 km (0.082 R)
• M5: 2,149,871 km (0.088 R)
• M6: 2,854,327 km (0.119 R)
• M7: 3,275,894 km (0.077 R)
• M8: 3,898,072 km (0.055 R)
• M9: 5,026,488 km (0.103 R)
• M10: 6,116,907 km (0.072 R)
• M11: 7,662,403 km (0.061 R)
• M12: 9,905,324 km (0.075 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 343.2

Radius: 12.2

Gravity: 2.31 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 1.48 AU - 1.56 AU

Year: 1210 Days

Day: 5.9 Hours

Environment

Temp: -172 °C

Axial Tilt: 31.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 71,572,600 km

• M1: 151,692 km (0.072 R)
• M2: 801,845 km (0.039 R)
• M3: 1,531,134 km (0.113 R)
• M4: 2,004,761 km (0.094 R)
• M5: 2,644,591 km (0.056 R)
• M6: 3,970,627 km (0.099 R)
• M7: 4,842,483 km (0.094 R)
• M8: 6,352,674 km (0.082 R)
• M9: 7,520,883 km (0.097 R)
• M10: 7,907,893 km (0.117 R)
• M11: 8,308,067 km (0.114 R)
• M12: 9,313,365 km (0.095 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 221.3

Radius: 9.4

Gravity: 2.5 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 3.55 AU - 3.55 AU

Year: 4319 Days

Day: 5.5 Hours

Environment

Temp: -209 °C

Axial Tilt: 31.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 71,572,600 km

• M1: 116,836 km (0.116 R)
• M2: 662,569 km (0.113 R)
• M3: 1,093,860 km (0.093 R)
• M4: 1,686,118 km (0.06 R)
• M5: 1,982,471 km (0.066 R)
• M6: 2,536,282 km (0.115 R)
• M7: 3,932,928 km (0.116 R)
• M8: 4,418,672 km (0.077 R)
• M9: 4,898,582 km (0.116 R)
• M10: 5,559,356 km (0.094 R)
• M11: 6,198,588 km (0.117 R)
• M12: 6,577,519 km (0.111 R)
• M13: 7,204,035 km (0.053 R)
• M14: 8,609,507 km (0.118 R)
• M15: 9,289,429 km (0.119 R)
• M16: 10,375,959 km (0.096 R)
• M17: 12,036,645 km (0.084 R)
• M18: 12,584,771 km (0.055 R)
• M19: 13,326,627 km (0.112 R)
• M20: 15,138,257 km (0.071 R)
• M21: 16,178,860 km (0.103 R)
• M22: 17,479,314 km (0.093 R)
• M23: 17,909,707 km (0.081 R)
• M24: 18,679,987 km (0.077 R)

Planet 8 - Ice Giant

Semi-Major Axis: 7.51 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 944.1

Radius: 5.5

Gravity: 31.21 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 5.65 AU - 9.37 AU

Year: 13288 Days

Day: 18.7 Hours

Environment

Temp: -225 °C

Axial Tilt: 7.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 71,572,600 km

• M1: 68,366 km (0.12 R)
• M2: 425,606 km (0.069 R)
• M3: 1,336,059 km (0.029 R)
• M4: 2,877,515 km (0.113 R)
• M5: 3,174,616 km (0.078 R)
• M6: 3,743,836 km (0.096 R)
• M7: 4,252,619 km (0.061 R)
• M8: 9,495,126 km (0.116 R)
• M9: 14,904,286 km (0.12 R)
• M10: 15,642,253 km (0.115 R)
• M11: 24,511,013 km (0.113 R)
• M12: 28,453,216 km (0.115 R)
• M13: 29,701,909 km (0.098 R)
• M14: 30,750,441 km (0.047 R)
• M15: 31,944,232 km (0.111 R)
• M16: 35,840,658 km (0.11 R)
• M17: 37,699,860 km (0.073 R)
• M18: 48,924,188 km (0.113 R)
• M19: 51,707,457 km (0.114 R)
• M20: 62,751,819 km (0.051 R)

Planet 9 - Ice Giant

Semi-Major Axis: 11.19 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 390.4

Radius: 4.5

Gravity: 19.28 G

Time & Orbit

Eccentricity (e): 0.07

Orbit Range: 10.41 AU - 11.97 AU

Year: 24169 Days

Day: 19.3 Hours

Environment

Temp: -235 °C

Axial Tilt: 32.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 71,572,600 km

• M1: 56,249 km (0.08 R)
• M2: 317,147 km (0.109 R)
• M3: 859,739 km (0.091 R)
• M4: 1,386,922 km (0.079 R)
• M5: 1,559,558 km (0.102 R)
• M6: 1,910,664 km (0.092 R)
• M7: 2,125,187 km (0.118 R)
• M8: 2,269,998 km (0.104 R)
• M9: 2,768,757 km (0.087 R)
• M10: 3,096,078 km (0.12 R)
• M11: 3,649,141 km (0.038 R)
• M12: 4,331,008 km (0.055 R)
• M13: 5,781,808 km (0.105 R)
• M14: 6,926,681 km (0.082 R)
• M15: 10,703,129 km (0.093 R)
• M16: 11,506,021 km (0.12 R)
• M17: 12,414,678 km (0.065 R)
• M18: 18,023,701 km (0.081 R)
• M19: 19,246,514 km (0.117 R)
• M20: 20,061,074 km (0.119 R)
• M21: 21,953,039 km (0.068 R)
• M22: 26,417,189 km (0.097 R)
• M23: 28,452,767 km (0.114 R)
• M24: 32,073,783 km (0.072 R)
• M25: 33,217,160 km (0.077 R)
• M26: 37,502,541 km (0.036 R)
• M27: 53,417,510 km (0.097 R)
• M28: 58,326,265 km (0.079 R)
• M29: 59,836,456 km (0.11 R)
• M30: 60,027,043 km (0.099 R)
• M31: 60,986,115 km (0.113 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 452 - 11,413 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit