🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.89

Radius: 1.89

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 0.49 AU - 0.71 AU

Year: 305 Days

Day: 42.9 Hours

Environment

Temp: -134 °C

Axial Tilt: 32.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.5

Radius: 1.83

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 0.53 AU - 0.73 AU

Year: 328 Days

Day: 43.8 Hours

Environment

Temp: -128 °C

Axial Tilt: 26 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 189

Radius: 10.9

Gravity: 1.59 G

Time & Orbit

Eccentricity (e): 0.238

Orbit Range: 0.56 AU - 0.92 AU

Year: 418 Days

Day: 9.8 Hours

Environment

Temp: -146 °C

Axial Tilt: 2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 53,646,526 km

• M1: 135,536 km (0.103 R)
• M2: 518,656 km (0.108 R)
• M3: 945,309 km (0.062 R)
• M4: 1,335,311 km (0.118 R)
• M5: 1,731,147 km (0.111 R)
• M6: 2,335,522 km (0.099 R)
• M7: 2,705,178 km (0.047 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 540.6

Radius: 9.9

Gravity: 5.52 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 1.2 AU - 1.98 AU

Year: 1315 Days

Day: 13.2 Hours

Environment

Temp: -186 °C

Axial Tilt: 7.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 53,646,526 km

• M1: 123,269 km (0.09 R)
• M2: 444,605 km (0.106 R)
• M3: 805,734 km (0.116 R)
• M4: 1,408,015 km (0.073 R)
• M5: 2,221,828 km (0.073 R)
• M6: 3,011,256 km (0.1 R)
• M7: 3,516,448 km (0.11 R)
• M8: 4,179,316 km (0.12 R)
• M9: 4,809,123 km (0.063 R)
• M10: 5,196,731 km (0.045 R)
• M11: 5,647,170 km (0.113 R)
• M12: 6,168,219 km (0.075 R)
• M13: 7,457,903 km (0.084 R)
• M14: 7,793,600 km (0.06 R)
• M15: 8,247,779 km (0.072 R)
• M16: 8,861,879 km (0.077 R)
• M17: 10,466,316 km (0.104 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 38.6

Radius: 12.3

Gravity: 0.26 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 2.23 AU - 3.65 AU

Year: 3307 Days

Day: 12.6 Hours

Environment

Temp: -194 °C

Axial Tilt: 37.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 53,646,526 km

• M1: 154,983 km (0.114 R)
• M2: 825,182 km (0.026 R)
• M3: 1,360,144 km (0.116 R)
• M4: 2,785,064 km (0.095 R)
• M5: 3,191,521 km (0.094 R)
• M6: 3,810,407 km (0.1 R)
• M7: 5,180,125 km (0.089 R)
• M8: 5,683,672 km (0.119 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 23.7

Radius: 12.7

Gravity: 0.15 G

Time & Orbit

Eccentricity (e): 0.178

Orbit Range: 2.81 AU - 4.03 AU

Year: 4149 Days

Day: 11.7 Hours

Environment

Temp: -205 °C

Axial Tilt: 11.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 53,646,526 km

• M1: 172,636 km (0.109 R)
• M2: 1,243,607 km (0.107 R)
• M3: 1,762,861 km (0.112 R)
• M4: 2,270,746 km (0.103 R)
• M5: 4,792,966 km (0.091 R)
• M6: 5,971,349 km (0.096 R)
• M7: 6,671,616 km (0.044 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 198.8

Radius: 12.3

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.026

Orbit Range: 3.35 AU - 3.53 AU

Year: 4185 Days

Day: 7.3 Hours

Environment

Temp: -198 °C

Axial Tilt: 35.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 53,646,526 km

• M1: 153,188 km (0.026 R)
• M2: 729,888 km (0.036 R)
• M3: 1,205,310 km (0.073 R)
• M4: 2,087,638 km (0.108 R)
• M5: 2,656,858 km (0.112 R)
• M6: 3,570,004 km (0.062 R)
• M7: 4,227,935 km (0.086 R)
• M8: 7,609,445 km (0.062 R)
• M9: 8,034,303 km (0.052 R)
• M10: 8,571,509 km (0.065 R)
• M11: 9,682,872 km (0.1 R)
• M12: 10,073,921 km (0.099 R)
• M13: 10,699,240 km (0.111 R)
• M14: 11,467,874 km (0.073 R)
• M15: 11,906,046 km (0.079 R)
• M16: 12,521,641 km (0.095 R)
• M17: 13,115,245 km (0.102 R)
• M18: 13,771,980 km (0.083 R)
• M19: 14,176,493 km (0.105 R)
• M20: 15,923,497 km (0.119 R)

Planet 8 - Ice Giant

Semi-Major Axis: 7.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 135.3

Radius: 4.6

Gravity: 6.39 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 6.89 AU - 7.27 AU

Year: 12358 Days

Day: 19.6 Hours

Environment

Temp: -225 °C

Axial Tilt: 141.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 53,646,526 km

• M1: 64,925 km (0.061 R)
• M2: 220,507 km (0.111 R)
• M3: 1,695,841 km (0.075 R)
• M4: 1,917,097 km (0.119 R)
• M5: 4,044,378 km (0.115 R)
• M6: 4,595,347 km (0.103 R)
• M7: 4,971,137 km (0.101 R)
• M8: 5,937,689 km (0.039 R)
• M9: 6,919,500 km (0.09 R)
• M10: 8,910,648 km (0.115 R)
• M11: 9,241,109 km (0.063 R)
• M12: 10,281,413 km (0.115 R)
• M13: 11,935,217 km (0.08 R)
• M14: 13,922,625 km (0.063 R)
• M15: 17,301,293 km (0.097 R)
• M16: 18,605,487 km (0.063 R)
• M17: 22,074,961 km (0.108 R)
• M18: 25,785,736 km (0.09 R)
• M19: 26,795,671 km (0.096 R)
• M20: 28,183,042 km (0.046 R)
• M21: 30,352,510 km (0.086 R)

Planet 9 - Ice Giant

Semi-Major Axis: 7.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 475.7

Radius: 5.6

Gravity: 15.17 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 7.58 AU - 7.96 AU

Year: 14208 Days

Day: 22 Hours

Environment

Temp: -222 °C

Axial Tilt: 10.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 53,646,526 km

• M1: 78,539 km (0.077 R)
• M2: 408,851 km (0.092 R)
• M3: 655,837 km (0.107 R)
• M4: 1,487,452 km (0.109 R)
• M5: 2,347,191 km (0.113 R)
• M6: 2,718,044 km (0.087 R)
• M7: 2,940,496 km (0.077 R)
• M8: 3,816,541 km (0.103 R)
• M9: 4,038,993 km (0.117 R)
• M10: 5,216,927 km (0.119 R)
• M11: 7,516,395 km (0.081 R)
• M12: 8,742,649 km (0.064 R)
• M13: 13,530,230 km (0.092 R)
• M14: 13,917,987 km (0.055 R)
• M15: 23,588,592 km (0.089 R)
• M16: 25,105,515 km (0.049 R)
• M17: 30,815,067 km (0.114 R)
• M18: 31,373,366 km (0.098 R)
• M19: 32,510,160 km (0.11 R)
• M20: 34,266,589 km (0.09 R)
• M21: 40,045,704 km (0.097 R)
• M22: 44,569,694 km (0.107 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 320 - 15,016 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit