🌌 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: 0.36

Radius: 0.66

Gravity: 0.83 G

Time & Orbit

Eccentricity (e): 0.198

Orbit Range: 0.48 AU - 0.72 AU

Year: 296 Days

Day: 30.1 Hours

Environment

Temp: -127 °C

Axial Tilt: 16.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.43

Radius: 1.64

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.143

Orbit Range: 0.56 AU - 0.74 AU

Year: 333 Days

Day: 24.8 Hours

Environment

Temp: -137 °C

Axial Tilt: 19.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 298.5

Radius: 12.6

Gravity: 1.88 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 0.61 AU - 0.77 AU

Year: 364 Days

Day: 6.6 Hours

Environment

Temp: -144 °C

Axial Tilt: 28.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 44,758,154 km

• M1: 159,023 km (0.028 R)
• M2: 788,231 km (0.098 R)
• M3: 1,801,757 km (0.086 R)
• M4: 2,597,767 km (0.107 R)
• M5: 3,135,422 km (0.076 R)
• M6: 3,994,413 km (0.082 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 688.2

Radius: 8

Gravity: 10.75 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 0.7 AU - 0.8 AU

Year: 413 Days

Day: 11.9 Hours

Environment

Temp: -139 °C

Axial Tilt: 36.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 44,758,154 km

• M1: 99,483 km (0.06 R)
• M2: 411,245 km (0.038 R)
• M3: 688,449 km (0.065 R)
• M4: 1,094,608 km (0.101 R)
• M5: 1,372,560 km (0.112 R)
• M6: 1,690,606 km (0.112 R)
• M7: 2,116,810 km (0.107 R)
• M8: 2,603,153 km (0.102 R)
• M9: 2,963,683 km (0.108 R)
• M10: 3,380,762 km (0.073 R)
• M11: 3,647,046 km (0.074 R)
• M12: 4,474,024 km (0.044 R)
• M13: 4,751,079 km (0.045 R)
• M14: 5,039,503 km (0.085 R)
• M15: 5,651,658 km (0.105 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.21 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 668.4

Radius: 13.8

Gravity: 3.51 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 1.01 AU - 1.41 AU

Year: 846 Days

Day: 7.8 Hours

Environment

Temp: -168 °C

Axial Tilt: 48.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 44,758,154 km

• M1: 171,738 km (0.057 R)
• M2: 809,773 km (0.119 R)
• M3: 1,288,935 km (0.068 R)
• M4: 1,759,271 km (0.081 R)
• M5: 2,398,802 km (0.039 R)
• M6: 2,961,888 km (0.116 R)
• M7: 4,309,017 km (0.089 R)
• M8: 4,775,762 km (0.118 R)
• M9: 5,733,189 km (0.117 R)
• M10: 6,383,640 km (0.036 R)
• M11: 7,616,776 km (0.06 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 781.2

Radius: 8.5

Gravity: 10.81 G

Time & Orbit

Eccentricity (e): 0.192

Orbit Range: 1 AU - 1.48 AU

Year: 878 Days

Day: 8.3 Hours

Environment

Temp: -172 °C

Axial Tilt: 6.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 44,758,154 km

• M1: 105,766 km (0.072 R)
• M2: 411,544 km (0.084 R)
• M3: 699,819 km (0.094 R)
• M4: 1,015,470 km (0.12 R)
• M5: 1,314,367 km (0.115 R)
• M6: 1,612,815 km (0.056 R)
• M7: 1,880,296 km (0.06 R)
• M8: 2,146,430 km (0.112 R)
• M9: 2,957,849 km (0.094 R)
• M10: 3,758,497 km (0.099 R)
• M11: 4,267,578 km (0.035 R)
• M12: 4,714,427 km (0.079 R)
• M13: 5,345,431 km (0.079 R)
• M14: 6,439,740 km (0.093 R)
• M15: 6,820,616 km (0.114 R)
• M16: 8,156,824 km (0.101 R)
• M17: 8,900,325 km (0.052 R)
• M18: 9,260,557 km (0.103 R)
• M19: 9,630,513 km (0.043 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 928.9

Radius: 12.4

Gravity: 6.04 G

Time & Orbit

Eccentricity (e): 0.182

Orbit Range: 1.1 AU - 1.6 AU

Year: 997 Days

Day: 6.2 Hours

Environment

Temp: -164 °C

Axial Tilt: 19.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 44,758,154 km

• M1: 154,385 km (0.087 R)
• M2: 544,237 km (0.054 R)
• M3: 958,623 km (0.052 R)
• M4: 1,360,443 km (0.06 R)
• M5: 2,026,902 km (0.027 R)
• M6: 2,671,519 km (0.097 R)
• M7: 3,259,588 km (0.088 R)
• M8: 4,064,724 km (0.112 R)
• M9: 4,550,917 km (0.076 R)
• M10: 4,998,364 km (0.073 R)
• M11: 5,619,794 km (0.115 R)
• M12: 6,135,906 km (0.085 R)
• M13: 7,798,537 km (0.099 R)
• M14: 8,387,055 km (0.051 R)
• M15: 9,473,136 km (0.071 R)
• M16: 10,300,412 km (0.083 R)
• M17: 11,175,260 km (0.093 R)

Planet 8 - Gas Giant

Semi-Major Axis: 1.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 792.8

Radius: 8

Gravity: 12.39 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 1.61 AU - 1.85 AU

Year: 1447 Days

Day: 12.9 Hours

Environment

Temp: -177 °C

Axial Tilt: 27.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 44,758,154 km

• M1: 99,931 km (0.057 R)
• M2: 493,972 km (0.117 R)
• M3: 780,153 km (0.074 R)
• M4: 1,362,687 km (0.103 R)
• M5: 1,612,815 km (0.063 R)
• M6: 2,353,175 km (0.103 R)
• M7: 2,662,992 km (0.037 R)
• M8: 3,179,104 km (0.1 R)
• M9: 3,726,184 km (0.059 R)
• M10: 4,506,037 km (0.114 R)
• M11: 4,782,195 km (0.066 R)
• M12: 7,444,588 km (0.088 R)
• M13: 7,916,271 km (0.032 R)
• M14: 8,736,366 km (0.099 R)
• M15: 12,055,344 km (0.087 R)
• M16: 12,396,876 km (0.069 R)
• M17: 13,020,101 km (0.058 R)
• M18: 13,582,290 km (0.093 R)

Planet 9 - Gas Giant

Semi-Major Axis: 1.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 792.6

Radius: 8.5

Gravity: 10.97 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 1.83 AU - 1.85 AU

Year: 1587 Days

Day: 5 Hours

Environment

Temp: -187 °C

Axial Tilt: 33.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 44,758,154 km

• M1: 105,766 km (0.081 R)
• M2: 847,472 km (0.067 R)
• M3: 1,361,640 km (0.054 R)
• M4: 2,249,054 km (0.108 R)
• M5: 2,649,977 km (0.114 R)
• M6: 3,237,298 km (0.098 R)
• M7: 3,890,891 km (0.081 R)
• M8: 4,549,720 km (0.116 R)
• M9: 4,833,358 km (0.109 R)
• M10: 5,779,265 km (0.112 R)
• M11: 7,216,900 km (0.107 R)
• M12: 8,358,631 km (0.085 R)
• M13: 9,815,715 km (0.047 R)
• M14: 10,817,123 km (0.07 R)
• M15: 13,471,288 km (0.054 R)
• M16: 14,272,086 km (0.057 R)

Planet 10 - Ice Giant

Semi-Major Axis: 11.11 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 100.6

Radius: 3.7

Gravity: 7.35 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 11.11 AU - 11.11 AU

Year: 23545 Days

Day: 24.7 Hours

Environment

Temp: -237 °C

Axial Tilt: 38.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 44,758,154 km

• M1: 55,650 km (0.08 R)
• M2: 671,844 km (0.052 R)
• M3: 3,527,069 km (0.073 R)
• M4: 4,570,664 km (0.107 R)
• M5: 6,479,084 km (0.067 R)
• M6: 7,047,556 km (0.061 R)
• M7: 7,404,197 km (0.099 R)
• M8: 10,599,308 km (0.104 R)
• M9: 12,668,247 km (0.119 R)
• M10: 16,116,627 km (0.106 R)
• M11: 17,945,013 km (0.089 R)
• M12: 19,136,260 km (0.071 R)
• M13: 21,182,759 km (0.113 R)
• M14: 23,984,279 km (0.115 R)
• M15: 24,789,115 km (0.117 R)
• M16: 28,584,712 km (0.067 R)
• M17: 32,532,600 km (0.057 R)
• M18: 35,433,602 km (0.084 R)
• M19: 36,593,734 km (0.062 R)
• M20: 38,260,104 km (0.069 R)
• M21: 38,381,129 km (0.088 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 402 - 14,599 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit