🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.29 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.57 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.35

Radius: 1.13

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 0.46 AU - 0.68 AU

Year: 274 Days

Day: 32.6 Hours

Environment

Temp: -130 °C

Axial Tilt: 3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 455.8

Radius: 10.4

Gravity: 4.21 G

Time & Orbit

Eccentricity (e): 0.146

Orbit Range: 0.8 AU - 1.08 AU

Year: 579 Days

Day: 7.9 Hours

Environment

Temp: -153 °C

Axial Tilt: 25.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 38,500,342 km

• M1: 129,552 km (0.115 R)
• M2: 487,839 km (0.088 R)
• M3: 1,161,627 km (0.092 R)
• M4: 1,529,189 km (0.113 R)
• M5: 2,084,646 km (0.064 R)
• M6: 2,429,469 km (0.107 R)
• M7: 2,876,767 km (0.065 R)
• M8: 4,226,589 km (0.048 R)
• M9: 4,558,546 km (0.034 R)
• M10: 4,970,688 km (0.105 R)
• M11: 5,730,346 km (0.079 R)
• M12: 6,120,198 km (0.107 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 326.5

Radius: 9.4

Gravity: 3.7 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 0.98 AU - 1.3 AU

Year: 774 Days

Day: 5.8 Hours

Environment

Temp: -155 °C

Axial Tilt: 125.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 38,500,342 km

• M1: 116,986 km (0.054 R)
• M2: 474,973 km (0.099 R)
• M3: 1,003,353 km (0.112 R)
• M4: 1,475,484 km (0.07 R)
• M5: 1,868,777 km (0.119 R)
• M6: 2,331,483 km (0.046 R)
• M7: 3,239,691 km (0.102 R)
• M8: 3,828,658 km (0.104 R)
• M9: 4,859,986 km (0.105 R)
• M10: 6,029,393 km (0.093 R)
• M11: 6,349,083 km (0.108 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 154.5

Radius: 12.7

Gravity: 0.96 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 0.96 AU - 1.5 AU

Year: 867 Days

Day: 10.7 Hours

Environment

Temp: -176 °C

Axial Tilt: 13 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 38,500,342 km

• M1: 157,975 km (0.073 R)
• M2: 823,985 km (0.061 R)
• M3: 1,929,214 km (0.086 R)
• M4: 2,686,030 km (0.094 R)
• M5: 3,101,313 km (0.115 R)
• M6: 3,693,871 km (0.044 R)
• M7: 4,319,639 km (0.114 R)
• M8: 5,278,860 km (0.112 R)
• M9: 5,683,821 km (0.087 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.78 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 712

Radius: 10

Gravity: 7.12 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 2.5 AU - 3.06 AU

Year: 2947 Days

Day: 9.9 Hours

Environment

Temp: -198 °C

Axial Tilt: 6.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 38,500,342 km

• M1: 124,316 km (0.082 R)
• M2: 470,635 km (0.064 R)
• M3: 1,048,831 km (0.117 R)
• M4: 2,178,295 km (0.118 R)
• M5: 2,733,003 km (0.115 R)
• M6: 3,165,192 km (0.116 R)
• M7: 3,661,857 km (0.12 R)
• M8: 4,627,661 km (0.101 R)
• M9: 5,194,786 km (0.06 R)
• M10: 5,807,838 km (0.106 R)
• M11: 6,905,887 km (0.046 R)
• M12: 7,363,357 km (0.116 R)
• M13: 7,971,622 km (0.101 R)
• M14: 8,406,802 km (0.102 R)
• M15: 9,583,240 km (0.049 R)
• M16: 11,443,788 km (0.119 R)
• M17: 12,570,559 km (0.059 R)
• M18: 14,842,802 km (0.085 R)
• M19: 16,447,987 km (0.05 R)
• M20: 20,867,856 km (0.064 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 747.3

Radius: 9.7

Gravity: 7.94 G

Time & Orbit

Eccentricity (e): 0.185

Orbit Range: 2.4 AU - 3.48 AU

Year: 3205 Days

Day: 9.2 Hours

Environment

Temp: -197 °C

Axial Tilt: 18.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 38,500,342 km

• M1: 120,576 km (0.082 R)
• M2: 426,653 km (0.11 R)
• M3: 812,167 km (0.105 R)
• M4: 1,131,857 km (0.119 R)
• M5: 1,453,194 km (0.112 R)
• M6: 1,860,698 km (0.094 R)
• M7: 2,329,239 km (0.073 R)
• M8: 2,825,305 km (0.101 R)
• M9: 3,945,494 km (0.101 R)
• M10: 4,423,160 km (0.083 R)
• M11: 5,416,191 km (0.109 R)
• M12: 6,376,011 km (0.095 R)
• M13: 7,034,989 km (0.062 R)
• M14: 7,381,309 km (0.107 R)
• M15: 8,523,937 km (0.096 R)
• M16: 8,917,828 km (0.087 R)
• M17: 13,029,675 km (0.091 R)
• M18: 13,746,698 km (0.088 R)
• M19: 18,552,829 km (0.074 R)
• M20: 20,081,420 km (0.116 R)
• M21: 21,560,195 km (0.11 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.58 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 316.4

Radius: 13.8

Gravity: 1.66 G

Time & Orbit

Eccentricity (e): 0.134

Orbit Range: 3.1 AU - 4.06 AU

Year: 4307 Days

Day: 7.2 Hours

Environment

Temp: -217 °C

Axial Tilt: 11.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 38,500,342 km

• M1: 171,888 km (0.093 R)
• M2: 938,577 km (0.049 R)
• M3: 1,920,687 km (0.114 R)
• M4: 3,169,979 km (0.115 R)
• M5: 4,073,550 km (0.081 R)
• M6: 4,520,100 km (0.025 R)
• M7: 5,691,750 km (0.068 R)
• M8: 6,279,969 km (0.11 R)
• M9: 8,459,909 km (0.094 R)
• M10: 9,591,916 km (0.094 R)
• M11: 12,069,556 km (0.12 R)
• M12: 12,505,784 km (0.111 R)
• M13: 13,549,528 km (0.083 R)
• M14: 20,263,032 km (0.102 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 666.6

Radius: 13.9

Gravity: 3.45 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 4.51 AU - 7.21 AU

Year: 9019 Days

Day: 11.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 28.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 38,500,342 km

• M1: 173,683 km (0.111 R)
• M2: 636,838 km (0.114 R)
• M3: 1,501,514 km (0.07 R)
• M4: 3,128,839 km (0.072 R)
• M5: 6,276,528 km (0.068 R)
• M6: 6,974,402 km (0.116 R)
• M7: 8,657,678 km (0.065 R)
• M8: 10,247,753 km (0.057 R)
• M9: 16,658,770 km (0.092 R)
• M10: 18,583,795 km (0.087 R)
• M11: 25,702,859 km (0.114 R)
• M12: 29,661,069 km (0.055 R)
• M13: 34,566,533 km (0.09 R)
• M14: 37,684,452 km (0.103 R)
• M15: 38,401,923 km (0.104 R)
• M16: 42,255,265 km (0.091 R)

Planet 9 - Ice Giant

Semi-Major Axis: 6.75 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 285.5

Radius: 7

Gravity: 5.83 G

Time & Orbit

Eccentricity (e): 0.239

Orbit Range: 5.14 AU - 8.36 AU

Year: 11150 Days

Day: 17.4 Hours

Environment

Temp: -214 °C

Axial Tilt: 24.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 38,500,342 km

• M1: 87,515 km (0.103 R)
• M2: 673,041 km (0.089 R)
• M3: 903,422 km (0.091 R)
• M4: 1,531,284 km (0.11 R)
• M5: 1,970,354 km (0.118 R)
• M6: 2,296,327 km (0.072 R)
• M7: 3,270,808 km (0.069 R)
• M8: 4,551,216 km (0.093 R)
• M9: 5,395,397 km (0.095 R)
• M10: 5,936,343 km (0.076 R)
• M11: 9,197,726 km (0.105 R)
• M12: 11,080,565 km (0.085 R)
• M13: 17,555,759 km (0.05 R)
• M14: 18,598,007 km (0.082 R)
• M15: 19,461,187 km (0.11 R)
• M16: 19,976,701 km (0.115 R)
• M17: 22,692,501 km (0.038 R)
• M18: 23,844,554 km (0.043 R)
• M19: 25,820,892 km (0.104 R)
• M20: 28,090,291 km (0.115 R)
• M21: 35,472,049 km (0.027 R)
• M22: 35,690,761 km (0.11 R)
• M23: 38,270,277 km (0.103 R)

Kuiper Belt

Range: 30 - 48 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 498 - 17,463 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit