🌌 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: 2.56

Radius: 1.46

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 0.45 AU - 0.71 AU

Year: 290 Days

Day: 28 Hours

Environment

Temp: -119 °C

Axial Tilt: 10.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.96 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 989.6

Radius: 8.8

Gravity: 12.78 G

Time & Orbit

Eccentricity (e): 0.138

Orbit Range: 0.83 AU - 1.09 AU

Year: 617 Days

Day: 9.5 Hours

Environment

Temp: -166 °C

Axial Tilt: 17.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 67,716,017 km

• M1: 109,506 km (0.119 R)
• M2: 388,206 km (0.119 R)
• M3: 1,197,830 km (0.074 R)
• M4: 1,476,381 km (0.113 R)
• M5: 1,764,357 km (0.113 R)
• M6: 2,138,651 km (0.097 R)
• M7: 2,488,860 km (0.11 R)
• M8: 2,817,377 km (0.047 R)
• M9: 3,252,707 km (0.048 R)
• M10: 3,689,532 km (0.101 R)
• M11: 4,012,065 km (0.092 R)
• M12: 4,531,469 km (0.029 R)
• M13: 4,833,358 km (0.032 R)
• M14: 5,997,229 km (0.083 R)
• M15: 6,341,005 km (0.103 R)
• M16: 6,870,731 km (0.088 R)
• M17: 7,429,479 km (0.084 R)
• M18: 7,970,126 km (0.08 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 219.9

Radius: 13.3

Gravity: 1.24 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 1.28 AU - 1.3 AU

Year: 961 Days

Day: 12.4 Hours

Environment

Temp: -165 °C

Axial Tilt: 34.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (5)

Outer Limit: 67,716,017 km

• M1: 175,329 km (0.055 R)
• M2: 663,317 km (0.093 R)
• M3: 1,490,444 km (0.113 R)
• M4: 3,491,764 km (0.088 R)
• M5: 4,191,882 km (0.107 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 103.6

Radius: 12.5

Gravity: 0.66 G

Time & Orbit

Eccentricity (e): 0.25

Orbit Range: 1.28 AU - 2.14 AU

Year: 1467 Days

Day: 13.8 Hours

Environment

Temp: -180 °C

Axial Tilt: 6.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 67,716,017 km

• M1: 156,031 km (0.078 R)
• M2: 596,746 km (0.117 R)
• M3: 1,013,526 km (0.057 R)
• M4: 1,618,948 km (0.112 R)
• M5: 2,388,629 km (0.114 R)
• M6: 2,936,756 km (0.03 R)
• M7: 3,646,448 km (0.094 R)
• M8: 4,099,430 km (0.069 R)
• M9: 4,605,520 km (0.083 R)
• M10: 5,547,987 km (0.096 R)
• M11: 6,112,419 km (0.103 R)
• M12: 6,835,875 km (0.115 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 788.6

Radius: 11.8

Gravity: 5.66 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 3.13 AU - 4.17 AU

Year: 4575 Days

Day: 8.5 Hours

Environment

Temp: -211 °C

Axial Tilt: 48.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (26)

Outer Limit: 67,716,017 km

• M1: 162,463 km (0.066 R)
• M2: 805,285 km (0.096 R)
• M3: 1,223,112 km (0.051 R)
• M4: 1,961,976 km (0.106 R)
• M5: 4,794,163 km (0.103 R)
• M6: 5,386,720 km (0.08 R)
• M7: 5,788,989 km (0.06 R)
• M8: 7,710,125 km (0.096 R)
• M9: 8,297,296 km (0.107 R)
• M10: 9,355,701 km (0.084 R)
• M11: 9,854,161 km (0.11 R)
• M12: 11,270,554 km (0.092 R)
• M13: 12,075,989 km (0.06 R)
• M14: 12,517,901 km (0.069 R)
• M15: 13,643,326 km (0.094 R)
• M16: 15,059,120 km (0.12 R)
• M17: 16,213,118 km (0.12 R)
• M18: 17,487,393 km (0.103 R)
• M19: 18,053,471 km (0.108 R)
• M20: 19,757,840 km (0.102 R)
• M21: 20,648,994 km (0.112 R)
• M22: 21,566,927 km (0.115 R)
• M23: 26,159,282 km (0.105 R)
• M24: 26,734,187 km (0.109 R)
• M25: 27,739,484 km (0.067 R)
• M26: 28,165,838 km (0.114 R)

Planet 6 - Ice Giant

Semi-Major Axis: 7.49 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 718.6

Radius: 7.2

Gravity: 13.86 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 6.96 AU - 8.02 AU

Year: 13447 Days

Day: 24.3 Hours

Environment

Temp: -218 °C

Axial Tilt: 12.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 67,716,017 km

• M1: 92,152 km (0.079 R)
• M2: 360,531 km (0.079 R)
• M3: 878,289 km (0.071 R)
• M4: 1,179,729 km (0.082 R)
• M5: 1,705,266 km (0.083 R)
• M6: 2,277,328 km (0.065 R)
• M7: 4,113,493 km (0.096 R)
• M8: 12,695,773 km (0.081 R)
• M9: 16,435,420 km (0.104 R)
• M10: 17,829,074 km (0.067 R)
• M11: 18,636,604 km (0.096 R)
• M12: 21,655,040 km (0.074 R)
• M13: 29,522,990 km (0.101 R)
• M14: 45,031,203 km (0.078 R)
• M15: 45,476,107 km (0.062 R)
• M16: 51,530,632 km (0.075 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.69 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 748

Radius: 8

Gravity: 11.69 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 7.33 AU - 10.05 AU

Year: 16805 Days

Day: 20.4 Hours

Environment

Temp: -225 °C

Axial Tilt: 72.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (37)

Outer Limit: 67,716,017 km

• M1: 100,679 km (0.109 R)
• M2: 682,316 km (0.085 R)
• M3: 1,227,750 km (0.092 R)
• M4: 1,486,105 km (0.117 R)
• M5: 2,742,279 km (0.106 R)
• M6: 3,459,600 km (0.056 R)
• M7: 4,044,378 km (0.104 R)
• M8: 5,447,756 km (0.079 R)
• M9: 6,115,561 km (0.085 R)
• M10: 6,705,425 km (0.084 R)
• M11: 8,196,168 km (0.069 R)
• M12: 8,913,041 km (0.112 R)
• M13: 10,008,995 km (0.066 R)
• M14: 11,690,774 km (0.069 R)
• M15: 12,466,140 km (0.118 R)
• M16: 15,073,033 km (0.119 R)
• M17: 15,604,105 km (0.071 R)
• M18: 16,069,205 km (0.103 R)
• M19: 16,945,848 km (0.044 R)
• M20: 17,686,657 km (0.073 R)
• M21: 18,277,419 km (0.104 R)
• M22: 21,431,092 km (0.095 R)
• M23: 22,590,924 km (0.085 R)
• M24: 24,304,717 km (0.085 R)
• M25: 25,246,286 km (0.03 R)
• M26: 25,672,491 km (0.059 R)
• M27: 26,212,090 km (0.057 R)
• M28: 27,090,978 km (0.118 R)
• M29: 35,105,684 km (0.079 R)
• M30: 39,791,837 km (0.058 R)
• M31: 40,952,118 km (0.101 R)
• M32: 42,284,137 km (0.082 R)
• M33: 47,901,837 km (0.114 R)
• M34: 56,319,709 km (0.077 R)
• M35: 58,336,138 km (0.087 R)
• M36: 62,512,462 km (0.061 R)
• M37: 65,071,633 km (0.099 R)

Planet 8 - Ice Giant

Semi-Major Axis: 9.51 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 521.8

Radius: 5.6

Gravity: 16.64 G

Time & Orbit

Eccentricity (e): 0.102

Orbit Range: 8.54 AU - 10.48 AU

Year: 19239 Days

Day: 21 Hours

Environment

Temp: -220 °C

Axial Tilt: 22.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 67,716,017 km

• M1: 69,713 km (0.092 R)
• M2: 457,620 km (0.087 R)
• M3: 3,305,365 km (0.093 R)
• M4: 5,153,347 km (0.036 R)
• M5: 7,457,603 km (0.105 R)
• M6: 7,787,018 km (0.09 R)
• M7: 8,274,258 km (0.085 R)
• M8: 8,525,433 km (0.102 R)
• M9: 8,833,455 km (0.107 R)
• M10: 10,083,794 km (0.086 R)
• M11: 10,312,679 km (0.067 R)
• M12: 11,759,589 km (0.042 R)
• M13: 12,077,186 km (0.092 R)
• M14: 13,200,067 km (0.065 R)
• M15: 13,474,131 km (0.105 R)
• M16: 17,227,242 km (0.104 R)
• M17: 19,606,297 km (0.084 R)
• M18: 28,380,212 km (0.114 R)
• M19: 30,473,685 km (0.076 R)
• M20: 43,548,389 km (0.107 R)
• M21: 45,855,188 km (0.101 R)
• M22: 47,437,485 km (0.064 R)
• M23: 47,919,190 km (0.042 R)
• M24: 57,884,951 km (0.066 R)
• M25: 62,383,210 km (0.108 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: 453 - 16,477 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit