🌌 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: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.48

Radius: 1.65

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 0.39 AU - 0.65 AU

Year: 242 Days

Day: 12.9 Hours

Environment

Temp: -112 °C

Axial Tilt: 0.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.3

Radius: 0.62

Gravity: 0.78 G

Time & Orbit

Eccentricity (e): 0.223

Orbit Range: 0.43 AU - 0.67 AU

Year: 263 Days

Day: 18.4 Hours

Environment

Temp: -129 °C

Axial Tilt: 23.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.63

Radius: 0.83

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 0.6 AU - 0.66 AU

Year: 323 Days

Day: 44.9 Hours

Environment

Temp: -141 °C

Axial Tilt: 32.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 102.9

Radius: 12.4

Gravity: 0.67 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 0.69 AU - 0.91 AU

Year: 462 Days

Day: 9.7 Hours

Environment

Temp: -138 °C

Axial Tilt: 8.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 90,369,776 km

• M1: 154,235 km (0.12 R)
• M2: 566,527 km (0.112 R)
• M3: 1,048,980 km (0.109 R)
• M4: 1,719,328 km (0.084 R)
• M5: 2,284,808 km (0.113 R)
• M6: 2,792,693 km (0.092 R)
• M7: 3,206,331 km (0.098 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.22 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 78.3

Radius: 13.3

Gravity: 0.44 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 1.17 AU - 1.27 AU

Year: 870 Days

Day: 7.8 Hours

Environment

Temp: -168 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 90,369,776 km

• M1: 165,455 km (0.088 R)
• M2: 596,746 km (0.06 R)
• M3: 1,097,450 km (0.06 R)
• M4: 1,971,102 km (0.113 R)
• M5: 2,531,046 km (0.109 R)
• M6: 3,094,432 km (0.068 R)
• M7: 3,660,959 km (0.089 R)
• M8: 4,567,672 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 992.1

Radius: 14.6

Gravity: 4.65 G

Time & Orbit

Eccentricity (e): 0.049

Orbit Range: 2.15 AU - 2.37 AU

Year: 2194 Days

Day: 14.5 Hours

Environment

Temp: -189 °C

Axial Tilt: 54.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 90,369,776 km

• M1: 181,761 km (0.071 R)
• M2: 653,294 km (0.056 R)
• M3: 1,460,823 km (0.086 R)
• M4: 2,096,315 km (0.087 R)
• M5: 2,580,862 km (0.114 R)
• M6: 3,074,835 km (0.078 R)
• M7: 3,669,337 km (0.072 R)
• M8: 4,195,622 km (0.027 R)
• M9: 5,138,687 km (0.085 R)
• M10: 5,775,076 km (0.104 R)
• M11: 7,691,425 km (0.101 R)
• M12: 9,000,406 km (0.081 R)
• M13: 10,263,611 km (0.098 R)
• M14: 12,354,540 km (0.044 R)
• M15: 12,874,991 km (0.118 R)
• M16: 14,572,478 km (0.046 R)
• M17: 17,527,335 km (0.092 R)
• M18: 18,633,013 km (0.098 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 371.3

Radius: 6.5

Gravity: 8.79 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 5.82 AU - 8.38 AU

Year: 12215 Days

Day: 16.9 Hours

Environment

Temp: -218 °C

Axial Tilt: 31 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 90,369,776 km

• M1: 84,672 km (0.116 R)
• M2: 666,758 km (0.112 R)
• M3: 891,753 km (0.096 R)
• M4: 1,123,630 km (0.096 R)
• M5: 1,555,369 km (0.098 R)
• M6: 5,520,461 km (0.083 R)
• M7: 6,531,443 km (0.059 R)
• M8: 8,293,108 km (0.038 R)
• M9: 11,121,704 km (0.104 R)
• M10: 13,072,610 km (0.113 R)
• M11: 14,159,738 km (0.094 R)
• M12: 15,901,506 km (0.083 R)
• M13: 18,962,727 km (0.096 R)
• M14: 23,859,664 km (0.071 R)
• M15: 29,945,006 km (0.051 R)
• M16: 30,356,400 km (0.093 R)
• M17: 31,613,471 km (0.039 R)
• M18: 34,680,676 km (0.084 R)
• M19: 40,390,228 km (0.08 R)
• M20: 43,466,709 km (0.1 R)
• M21: 44,659,452 km (0.117 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.2 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 434

Radius: 7.7

Gravity: 7.32 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 7.56 AU - 8.84 AU

Year: 15161 Days

Day: 18.2 Hours

Environment

Temp: -232 °C

Axial Tilt: 26 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 90,369,776 km

• M1: 95,743 km (0.113 R)
• M2: 352,901 km (0.117 R)
• M3: 1,223,711 km (0.082 R)
• M4: 1,488,200 km (0.104 R)
• M5: 3,025,019 km (0.077 R)
• M6: 8,635,986 km (0.083 R)
• M7: 8,875,492 km (0.069 R)
• M8: 11,694,066 km (0.094 R)
• M9: 12,106,208 km (0.113 R)
• M10: 12,897,132 km (0.11 R)
• M11: 15,688,478 km (0.073 R)
• M12: 17,990,490 km (0.05 R)
• M13: 18,939,090 km (0.052 R)
• M14: 20,935,624 km (0.051 R)
• M15: 21,281,494 km (0.091 R)
• M16: 21,719,217 km (0.112 R)
• M17: 28,073,536 km (0.112 R)
• M18: 32,127,190 km (0.114 R)
• M19: 34,113,999 km (0.051 R)
• M20: 35,687,619 km (0.079 R)
• M21: 40,030,745 km (0.097 R)
• M22: 40,832,140 km (0.113 R)
• M23: 42,882,230 km (0.088 R)
• M24: 46,303,683 km (0.063 R)
• M25: 50,830,813 km (0.109 R)

Asteroid Belt

Center: 9.35 AU

Composition

Type: Outer System (Icy)

A dense region of planetesimals and debris.

Boundary

Planet 9 - Ice Giant

Semi-Major Axis: 10.49 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 953.9

Radius: 5.1

Gravity: 36.67 G

Time & Orbit

Eccentricity (e): 0.111

Orbit Range: 9.33 AU - 11.65 AU

Year: 21937 Days

Day: 18.5 Hours

Environment

Temp: -223 °C

Axial Tilt: 33 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 90,369,776 km

• M1: 98,585 km (0.093 R)
• M2: 476,469 km (0.105 R)
• M3: 673,041 km (0.07 R)
• M4: 899,682 km (0.099 R)
• M5: 1,327,532 km (0.076 R)
• M6: 2,625,592 km (0.053 R)
• M7: 4,103,619 km (0.104 R)
• M8: 5,886,527 km (0.095 R)
• M9: 6,062,454 km (0.104 R)
• M10: 6,801,916 km (0.083 R)
• M11: 9,201,915 km (0.08 R)
• M12: 10,493,991 km (0.067 R)
• M13: 14,682,133 km (0.083 R)
• M14: 15,922,599 km (0.089 R)
• M15: 19,085,996 km (0.084 R)
• M16: 20,967,189 km (0.112 R)
• M17: 26,740,619 km (0.101 R)
• M18: 37,404,554 km (0.103 R)
• M19: 43,083,588 km (0.063 R)
• M20: 43,414,798 km (0.089 R)
• M21: 63,726,599 km (0.101 R)
• M22: 75,550,216 km (0.052 R)
• M23: 79,711,281 km (0.082 R)
• M24: 87,422,303 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: 246 - 13,210 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit