🌌 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: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.87

Radius: 1.52

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 0.57 AU - 0.59 AU

Year: 281 Days

Day: 33.3 Hours

Environment

Temp: -117 °C

Axial Tilt: 14.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 410.9

Radius: 11.4

Gravity: 3.16 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 0.69 AU - 0.91 AU

Year: 455 Days

Day: 10 Hours

Environment

Temp: -141 °C

Axial Tilt: 37.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 29,956,087 km

• M1: 141,819 km (0.033 R)
• M2: 499,806 km (0.082 R)
• M3: 866,770 km (0.086 R)
• M4: 1,353,262 km (0.103 R)
• M5: 2,883,948 km (0.097 R)
• M6: 3,273,201 km (0.054 R)
• M7: 3,697,611 km (0.099 R)
• M8: 4,158,671 km (0.096 R)
• M9: 4,588,167 km (0.111 R)
• M10: 4,944,359 km (0.098 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 514.6

Radius: 10.7

Gravity: 4.49 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 0.68 AU - 1.1 AU

Year: 534 Days

Day: 12.4 Hours

Environment

Temp: -160 °C

Axial Tilt: 31.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 29,956,087 km

• M1: 133,292 km (0.114 R)
• M2: 558,898 km (0.107 R)
• M3: 1,058,704 km (0.03 R)
• M4: 1,637,349 km (0.081 R)
• M5: 2,017,028 km (0.116 R)
• M6: 2,968,620 km (0.052 R)
• M7: 3,369,393 km (0.096 R)
• M8: 3,977,957 km (0.069 R)
• M9: 4,351,503 km (0.092 R)
• M10: 4,840,090 km (0.117 R)
• M11: 5,348,573 km (0.073 R)
• M12: 5,787,642 km (0.101 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 144.8

Radius: 12.8

Gravity: 0.88 G

Time & Orbit

Eccentricity (e): 0.15

Orbit Range: 1.47 AU - 1.99 AU

Year: 1447 Days

Day: 5.2 Hours

Environment

Temp: -189 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 29,956,087 km

• M1: 159,322 km (0.049 R)
• M2: 656,286 km (0.116 R)
• M3: 1,066,184 km (0.114 R)
• M4: 1,602,044 km (0.115 R)
• M5: 2,133,266 km (0.12 R)
• M6: 3,060,922 km (0.106 R)
• M7: 4,121,571 km (0.087 R)
• M8: 4,631,700 km (0.064 R)
• M9: 5,288,883 km (0.083 R)
• M10: 6,123,789 km (0.108 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.03 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 938.4

Radius: 14.7

Gravity: 4.34 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 1.54 AU - 2.52 AU

Year: 1839 Days

Day: 14.6 Hours

Environment

Temp: -192 °C

Axial Tilt: 5.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 29,956,087 km

• M1: 183,108 km (0.076 R)
• M2: 730,486 km (0.042 R)
• M3: 1,331,122 km (0.102 R)
• M4: 2,563,958 km (0.098 R)
• M5: 3,094,582 km (0.059 R)
• M6: 4,261,894 km (0.099 R)
• M7: 4,732,080 km (0.116 R)
• M8: 5,191,794 km (0.105 R)
• M9: 5,753,833 km (0.073 R)
• M10: 6,620,005 km (0.084 R)
• M11: 9,167,806 km (0.071 R)
• M12: 9,851,618 km (0.055 R)
• M13: 11,092,233 km (0.103 R)
• M14: 11,711,120 km (0.056 R)
• M15: 12,517,003 km (0.035 R)
• M16: 14,375,009 km (0.094 R)
• M17: 16,066,961 km (0.079 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 653.4

Radius: 9.6

Gravity: 7.09 G

Time & Orbit

Eccentricity (e): 0.111

Orbit Range: 4.65 AU - 5.81 AU

Year: 7605 Days

Day: 10.3 Hours

Environment

Temp: -225 °C

Axial Tilt: 33.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 29,956,087 km

• M1: 119,379 km (0.102 R)
• M2: 542,442 km (0.085 R)
• M3: 865,424 km (0.114 R)
• M4: 1,606,083 km (0.1 R)
• M5: 1,947,914 km (0.091 R)
• M6: 2,356,017 km (0.063 R)
• M7: 3,714,665 km (0.086 R)
• M8: 5,758,321 km (0.107 R)
• M9: 8,841,384 km (0.101 R)
• M10: 9,966,061 km (0.079 R)
• M11: 10,489,952 km (0.107 R)
• M12: 11,284,915 km (0.101 R)
• M13: 12,827,120 km (0.048 R)
• M14: 13,219,515 km (0.057 R)
• M15: 26,195,485 km (0.083 R)
• M16: 26,646,074 km (0.103 R)
• M17: 27,935,308 km (0.104 R)
• M18: 29,073,149 km (0.083 R)
• M19: 30,340,243 km (0.103 R)
• M20: 31,440,984 km (0.115 R)
• M21: 32,052,391 km (0.049 R)
• M22: 35,558,217 km (0.056 R)
• M23: 39,194,044 km (0.09 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.32 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 811.7

Radius: 6.6

Gravity: 18.63 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 5.06 AU - 7.58 AU

Year: 10102 Days

Day: 23.7 Hours

Environment

Temp: -217 °C

Axial Tilt: 31.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 29,956,087 km

• M1: 82,279 km (0.061 R)
• M2: 315,352 km (0.069 R)
• M3: 554,260 km (0.101 R)
• M4: 760,855 km (0.101 R)
• M5: 1,630,617 km (0.115 R)
• M6: 2,480,781 km (0.101 R)
• M7: 5,898,644 km (0.116 R)
• M8: 6,303,456 km (0.091 R)
• M9: 8,244,937 km (0.071 R)
• M10: 9,326,829 km (0.119 R)
• M11: 12,057,738 km (0.102 R)
• M12: 15,211,411 km (0.106 R)
• M13: 16,326,513 km (0.111 R)
• M14: 17,050,567 km (0.098 R)
• M15: 18,562,403 km (0.118 R)
• M16: 20,994,715 km (0.054 R)
• M17: 24,463,740 km (0.114 R)
• M18: 41,357,379 km (0.117 R)
• M19: 47,338,002 km (0.082 R)
• M20: 47,629,419 km (0.075 R)

Planet 8 - Ice Giant

Semi-Major Axis: 6.32 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 290.2

Radius: 4.4

Gravity: 14.99 G

Time & Orbit

Eccentricity (e): 0.022

Orbit Range: 6.18 AU - 6.46 AU

Year: 10102 Days

Day: 19.9 Hours

Environment

Temp: -216 °C

Axial Tilt: 23.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 29,956,087 km

• M1: 55,800 km (0.084 R)
• M2: 295,157 km (0.089 R)
• M3: 751,281 km (0.082 R)
• M4: 910,303 km (0.12 R)
• M5: 1,071,420 km (0.044 R)
• M6: 4,032,111 km (0.086 R)
• M7: 4,687,948 km (0.111 R)
• M8: 5,381,783 km (0.078 R)
• M9: 5,784,950 km (0.064 R)
• M10: 7,793,750 km (0.12 R)
• M11: 14,017,769 km (0.068 R)
• M12: 14,719,682 km (0.107 R)
• M13: 16,193,371 km (0.04 R)
• M14: 17,695,184 km (0.102 R)
• M15: 18,583,795 km (0.078 R)
• M16: 19,074,477 km (0.119 R)
• M17: 20,897,476 km (0.097 R)
• M18: 29,070,457 km (0.117 R)
• M19: 34,851,367 km (0.095 R)

Planet 9 - Ice Giant

Semi-Major Axis: 9.47 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 48.7

Radius: 4.1

Gravity: 2.9 G

Time & Orbit

Eccentricity (e): 0.132

Orbit Range: 8.22 AU - 10.72 AU

Year: 18529 Days

Day: 23.2 Hours

Environment

Temp: -222 °C

Axial Tilt: 8.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 29,956,087 km

• M1: 53,406 km (0.101 R)
• M2: 182,958 km (0.108 R)
• M3: 529,576 km (0.055 R)
• M4: 666,159 km (0.039 R)
• M5: 1,040,154 km (0.115 R)
• M6: 1,529,189 km (0.114 R)
• M7: 1,691,952 km (0.1 R)
• M8: 2,704,131 km (0.115 R)
• M9: 3,296,688 km (0.068 R)
• M10: 3,656,172 km (0.079 R)
• M11: 4,017,900 km (0.081 R)
• M12: 7,528,662 km (0.114 R)
• M13: 8,038,342 km (0.106 R)
• M14: 9,454,137 km (0.114 R)
• M15: 15,826,408 km (0.073 R)
• M16: 16,180,356 km (0.089 R)
• M17: 19,947,978 km (0.091 R)
• M18: 20,850,203 km (0.096 R)
• M19: 21,062,183 km (0.071 R)
• M20: 23,261,871 km (0.119 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: 372 - 16,755 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit