🌌 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: 0.35

Radius: 0.66

Gravity: 0.8 G

Time & Orbit

Eccentricity (e): 0.12

Orbit Range: 0.51 AU - 0.65 AU

Year: 285 Days

Day: 30.6 Hours

Environment

Temp: -124 °C

Axial Tilt: 30 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 36,493,001 km

• M1: 15,708 km (0.079 R)
• M2: 179,667 km (0.101 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.12

Radius: 1.58

Gravity: 1.25 G

Time & Orbit

Eccentricity (e): 0.051

Orbit Range: 0.6 AU - 0.66 AU

Year: 323 Days

Day: 22.6 Hours

Environment

Temp: -122 °C

Axial Tilt: 32.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 36,493,001 km

• M1: 385,065 km (0.068 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 321.3

Radius: 10

Gravity: 3.21 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 0.58 AU - 0.92 AU

Year: 419 Days

Day: 5.1 Hours

Environment

Temp: -135 °C

Axial Tilt: 8.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 36,493,001 km

• M1: 124,316 km (0.096 R)
• M2: 578,196 km (0.118 R)
• M3: 908,508 km (0.112 R)
• M4: 1,492,688 km (0.046 R)
• M5: 1,961,078 km (0.079 R)
• M6: 2,525,661 km (0.081 R)
• M7: 3,002,728 km (0.108 R)
• M8: 3,943,549 km (0.083 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 914.7

Radius: 13

Gravity: 5.41 G

Time & Orbit

Eccentricity (e): 0.118

Orbit Range: 1.49 AU - 1.89 AU

Year: 1419 Days

Day: 13.3 Hours

Environment

Temp: -190 °C

Axial Tilt: 143.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 36,493,001 km

• M1: 161,715 km (0.086 R)
• M2: 626,815 km (0.12 R)
• M3: 1,183,618 km (0.056 R)
• M4: 1,893,759 km (0.107 R)
• M5: 2,627,986 km (0.088 R)
• M6: 3,151,878 km (0.095 R)
• M7: 3,728,129 km (0.053 R)
• M8: 4,431,089 km (0.095 R)
• M9: 5,571,174 km (0.104 R)
• M10: 6,467,116 km (0.053 R)
• M11: 7,294,243 km (0.113 R)
• M12: 7,959,804 km (0.115 R)
• M13: 9,034,066 km (0.109 R)
• M14: 10,034,576 km (0.077 R)
• M15: 10,683,382 km (0.115 R)
• M16: 11,323,811 km (0.092 R)
• M17: 12,370,697 km (0.075 R)
• M18: 12,957,569 km (0.092 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 816

Radius: 11.5

Gravity: 6.17 G

Time & Orbit

Eccentricity (e): 0.121

Orbit Range: 1.7 AU - 2.16 AU

Year: 1731 Days

Day: 12.8 Hours

Environment

Temp: -192 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 36,493,001 km

• M1: 144,063 km (0.105 R)
• M2: 609,013 km (0.113 R)
• M3: 1,007,990 km (0.091 R)
• M4: 1,377,946 km (0.064 R)
• M5: 1,819,260 km (0.072 R)
• M6: 2,205,521 km (0.053 R)
• M7: 2,904,443 km (0.067 R)
• M8: 3,306,412 km (0.062 R)
• M9: 3,763,434 km (0.105 R)
• M10: 4,185,599 km (0.109 R)
• M11: 5,740,818 km (0.112 R)
• M12: 7,311,297 km (0.073 R)
• M13: 8,091,001 km (0.038 R)
• M14: 8,925,308 km (0.119 R)
• M15: 9,646,819 km (0.052 R)
• M16: 10,230,699 km (0.097 R)
• M17: 11,021,025 km (0.03 R)
• M18: 12,203,297 km (0.091 R)
• M19: 15,272,895 km (0.061 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.87 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 692.9

Radius: 13.9

Gravity: 3.59 G

Time & Orbit

Eccentricity (e): 0.084

Orbit Range: 4.46 AU - 5.28 AU

Year: 6939 Days

Day: 10.9 Hours

Environment

Temp: -223 °C

Axial Tilt: 2.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 36,493,001 km

• M1: 173,234 km (0.099 R)
• M2: 825,032 km (0.11 R)
• M3: 2,331,932 km (0.078 R)
• M4: 3,178,506 km (0.07 R)
• M5: 7,088,695 km (0.08 R)
• M6: 8,080,679 km (0.109 R)
• M7: 16,717,562 km (0.11 R)
• M8: 17,512,675 km (0.094 R)
• M9: 19,393,718 km (0.119 R)
• M10: 21,715,926 km (0.084 R)
• M11: 26,548,835 km (0.12 R)
• M12: 30,077,849 km (0.109 R)
• M13: 31,254,286 km (0.05 R)
• M14: 32,665,293 km (0.072 R)
• M15: 37,601,126 km (0.106 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.03 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 208.7

Radius: 3.8

Gravity: 14.45 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 5.53 AU - 8.53 AU

Year: 12035 Days

Day: 20.5 Hours

Environment

Temp: -221 °C

Axial Tilt: 4.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 36,493,001 km

• M1: 47,273 km (0.094 R)
• M2: 193,729 km (0.083 R)
• M3: 399,426 km (0.08 R)
• M4: 710,291 km (0.106 R)
• M5: 1,275,471 km (0.099 R)
• M6: 1,691,653 km (0.109 R)
• M7: 2,143,289 km (0.117 R)
• M8: 2,522,519 km (0.087 R)
• M9: 2,965,179 km (0.076 R)
• M10: 3,258,840 km (0.097 R)
• M11: 4,414,334 km (0.047 R)
• M12: 6,044,951 km (0.079 R)
• M13: 6,482,076 km (0.119 R)
• M14: 6,796,680 km (0.109 R)
• M15: 7,418,858 km (0.111 R)
• M16: 8,524,835 km (0.116 R)
• M17: 8,945,205 km (0.115 R)
• M18: 11,355,974 km (0.115 R)
• M19: 12,872,298 km (0.062 R)
• M20: 13,425,063 km (0.098 R)
• M21: 14,283,605 km (0.106 R)
• M22: 15,670,078 km (0.056 R)
• M23: 18,290,733 km (0.109 R)
• M24: 18,777,525 km (0.092 R)
• M25: 23,148,027 km (0.104 R)
• M26: 23,472,205 km (0.12 R)
• M27: 27,421,290 km (0.117 R)
• M28: 28,427,186 km (0.074 R)
• M29: 30,029,529 km (0.037 R)
• M30: 31,196,392 km (0.07 R)
• M31: 34,983,612 km (0.106 R)
• M32: 35,196,639 km (0.032 R)
• M33: 35,949,116 km (0.081 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 281 - 16,622 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit