🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.82

Radius: 0.92

Gravity: 0.97 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 0.59 AU - 0.67 AU

Year: 328 Days

Day: 18 Hours

Environment

Temp: -128 °C

Axial Tilt: 31.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 68,035,027 km

• M1: 84,672 km (0.118 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.55

Radius: 1.83

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.099

Orbit Range: 0.6 AU - 0.74 AU

Year: 360 Days

Day: 14.3 Hours

Environment

Temp: -129 °C

Axial Tilt: 3.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 736.5

Radius: 10.8

Gravity: 6.31 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 0.74 AU - 0.86 AU

Year: 469 Days

Day: 8.7 Hours

Environment

Temp: -138 °C

Axial Tilt: 17.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 68,035,027 km

• M1: 134,339 km (0.055 R)
• M2: 537,655 km (0.12 R)
• M3: 1,092,214 km (0.115 R)
• M4: 1,478,775 km (0.083 R)
• M5: 1,844,392 km (0.033 R)
• M6: 2,198,191 km (0.072 R)
• M7: 3,206,780 km (0.111 R)
• M8: 4,470,433 km (0.112 R)
• M9: 4,926,407 km (0.113 R)
• M10: 5,531,531 km (0.107 R)
• M11: 5,932,304 km (0.115 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 811.7

Radius: 11.1

Gravity: 6.59 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 0.8 AU - 1.22 AU

Year: 666 Days

Day: 13.8 Hours

Environment

Temp: -158 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 68,035,027 km

• M1: 138,528 km (0.116 R)
• M2: 520,451 km (0.051 R)
• M3: 1,193,492 km (0.05 R)
• M4: 1,663,678 km (0.115 R)
• M5: 2,526,259 km (0.085 R)
• M6: 3,339,174 km (0.103 R)
• M7: 4,412,988 km (0.109 R)
• M8: 5,117,594 km (0.105 R)
• M9: 6,072,327 km (0.105 R)
• M10: 6,581,858 km (0.088 R)
• M11: 7,433,668 km (0.11 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 484.3

Radius: 12.6

Gravity: 3.05 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 0.99 AU - 1.59 AU

Year: 961 Days

Day: 11.5 Hours

Environment

Temp: -172 °C

Axial Tilt: 7.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 68,035,027 km

• M1: 156,629 km (0.093 R)
• M2: 767,886 km (0.063 R)
• M3: 1,527,544 km (0.117 R)
• M4: 2,048,743 km (0.101 R)
• M5: 3,361,015 km (0.067 R)
• M6: 3,945,345 km (0.094 R)
• M7: 4,664,013 km (0.079 R)
• M8: 6,660,247 km (0.094 R)
• M9: 7,056,532 km (0.111 R)
• M10: 7,609,445 km (0.093 R)
• M11: 8,595,295 km (0.101 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 841.1

Radius: 12.9

Gravity: 5.05 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 1.5 AU - 2.22 AU

Year: 1664 Days

Day: 7.4 Hours

Environment

Temp: -196 °C

Axial Tilt: 35.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 68,035,027 km

• M1: 160,369 km (0.086 R)
• M2: 579,542 km (0.119 R)
• M3: 1,100,442 km (0.036 R)
• M4: 1,646,624 km (0.1 R)
• M5: 2,235,291 km (0.057 R)
• M6: 2,759,482 km (0.114 R)
• M7: 3,381,361 km (0.067 R)
• M8: 3,930,534 km (0.096 R)
• M9: 4,479,110 km (0.082 R)
• M10: 4,886,914 km (0.111 R)
• M11: 5,848,978 km (0.063 R)
• M12: 6,515,137 km (0.059 R)
• M13: 6,986,969 km (0.071 R)
• M14: 9,043,490 km (0.101 R)
• M15: 9,665,369 km (0.12 R)
• M16: 10,777,031 km (0.12 R)
• M17: 12,284,379 km (0.062 R)
• M18: 13,006,787 km (0.078 R)
• M19: 13,420,275 km (0.105 R)
• M20: 15,390,928 km (0.114 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 429.1

Radius: 12

Gravity: 2.98 G

Time & Orbit

Eccentricity (e): 0.183

Orbit Range: 3.81 AU - 5.51 AU

Year: 6599 Days

Day: 10.9 Hours

Environment

Temp: -215 °C

Axial Tilt: 32.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 68,035,027 km

• M1: 152,889 km (0.074 R)
• M2: 576,849 km (0.096 R)
• M3: 1,172,548 km (0.101 R)
• M4: 1,691,054 km (0.032 R)
• M5: 2,392,668 km (0.099 R)
• M6: 2,784,615 km (0.058 R)
• M7: 4,626,015 km (0.12 R)
• M8: 5,129,861 km (0.108 R)
• M9: 6,248,254 km (0.081 R)
• M10: 7,137,015 km (0.096 R)
• M11: 9,371,110 km (0.038 R)
• M12: 10,049,835 km (0.093 R)
• M13: 11,316,181 km (0.114 R)
• M14: 13,411,150 km (0.091 R)
• M15: 17,207,495 km (0.051 R)
• M16: 21,959,471 km (0.089 R)
• M17: 23,463,229 km (0.09 R)
• M18: 24,794,351 km (0.114 R)
• M19: 25,682,214 km (0.088 R)
• M20: 30,994,435 km (0.049 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 279.9

Radius: 8.5

Gravity: 3.87 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 4.09 AU - 5.89 AU

Year: 7312 Days

Day: 13.6 Hours

Environment

Temp: -226 °C

Axial Tilt: 26.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 68,035,027 km

• M1: 105,766 km (0.102 R)
• M2: 383,719 km (0.08 R)
• M3: 1,022,053 km (0.075 R)
• M4: 2,059,364 km (0.094 R)
• M5: 2,960,691 km (0.077 R)
• M6: 7,161,998 km (0.116 R)
• M7: 7,540,481 km (0.101 R)
• M8: 13,033,864 km (0.051 R)
• M9: 16,612,245 km (0.079 R)
• M10: 18,210,549 km (0.074 R)
• M11: 23,019,223 km (0.038 R)
• M12: 23,920,550 km (0.115 R)
• M13: 26,684,071 km (0.111 R)

Planet 9 - Ice Giant

Semi-Major Axis: 7.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 970.3

Radius: 5.7

Gravity: 29.86 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 7.62 AU - 7.92 AU

Year: 14208 Days

Day: 17.2 Hours

Environment

Temp: -218 °C

Axial Tilt: 10.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (37)

Outer Limit: 68,035,027 km

• M1: 71,059 km (0.076 R)
• M2: 278,102 km (0.062 R)
• M3: 794,514 km (0.12 R)
• M4: 1,408,614 km (0.085 R)
• M5: 1,611,319 km (0.097 R)
• M6: 1,999,226 km (0.067 R)
• M7: 2,382,496 km (0.063 R)
• M8: 2,580,563 km (0.116 R)
• M9: 4,388,005 km (0.071 R)
• M10: 5,142,277 km (0.062 R)
• M11: 7,728,974 km (0.048 R)
• M12: 7,920,758 km (0.112 R)
• M13: 9,354,205 km (0.086 R)
• M14: 10,654,360 km (0.085 R)
• M15: 14,243,363 km (0.099 R)
• M16: 15,346,198 km (0.113 R)
• M17: 17,309,072 km (0.081 R)
• M18: 18,649,469 km (0.049 R)
• M19: 18,995,190 km (0.069 R)
• M20: 22,886,679 km (0.037 R)
• M21: 23,084,148 km (0.064 R)
• M22: 23,282,814 km (0.102 R)
• M23: 23,683,587 km (0.079 R)
• M24: 23,987,121 km (0.062 R)
• M25: 27,723,328 km (0.072 R)
• M26: 30,023,395 km (0.089 R)
• M27: 31,952,759 km (0.111 R)
• M28: 37,818,940 km (0.119 R)
• M29: 38,651,602 km (0.113 R)
• M30: 41,077,182 km (0.116 R)
• M31: 43,149,262 km (0.042 R)
• M32: 44,517,484 km (0.109 R)
• M33: 47,983,517 km (0.108 R)
• M34: 50,113,791 km (0.093 R)
• M35: 52,306,447 km (0.027 R)
• M36: 54,035,948 km (0.086 R)
• M37: 55,269,083 km (0.106 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 438 - 16,720 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit