🌌 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: 0.63

Radius: 0.83

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 0.56 AU - 0.6 AU

Year: 281 Days

Day: 18 Hours

Environment

Temp: -120 °C

Axial Tilt: 49.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 155

Radius: 11.6

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.227

Orbit Range: 0.59 AU - 0.93 AU

Year: 421 Days

Day: 9.6 Hours

Environment

Temp: -137 °C

Axial Tilt: 9.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 48,913,663 km

• M1: 147,504 km (0.081 R)
• M2: 536,009 km (0.08 R)
• M3: 1,084,435 km (0.036 R)
• M4: 1,586,785 km (0.085 R)
• M5: 2,055,924 km (0.111 R)
• M6: 3,154,720 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 75.6

Radius: 13.8

Gravity: 0.4 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 0.98 AU - 1.5 AU

Year: 878 Days

Day: 14.6 Hours

Environment

Temp: -166 °C

Axial Tilt: 21.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 48,913,663 km

• M1: 171,589 km (0.043 R)
• M2: 825,930 km (0.12 R)
• M3: 1,295,817 km (0.096 R)
• M4: 1,920,986 km (0.104 R)
• M5: 2,546,006 km (0.101 R)
• M6: 3,389,439 km (0.078 R)
• M7: 3,918,417 km (0.078 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.12 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 109.3

Radius: 14

Gravity: 0.56 G

Time & Orbit

Eccentricity (e): 0.195

Orbit Range: 2.51 AU - 3.73 AU

Year: 3504 Days

Day: 7.7 Hours

Environment

Temp: -207 °C

Axial Tilt: 32.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 48,913,663 km

• M1: 174,132 km (0.098 R)
• M2: 632,201 km (0.117 R)
• M3: 1,289,833 km (0.035 R)
• M4: 1,825,543 km (0.095 R)
• M5: 2,765,616 km (0.066 R)
• M6: 3,610,694 km (0.097 R)
• M7: 4,147,152 km (0.09 R)
• M8: 5,031,874 km (0.098 R)
• M9: 5,769,990 km (0.094 R)
• M10: 6,459,187 km (0.039 R)
• M11: 7,049,500 km (0.079 R)
• M12: 7,920,160 km (0.073 R)
• M13: 8,396,031 km (0.028 R)
• M14: 9,529,235 km (0.07 R)
• M15: 9,971,596 km (0.101 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 140.8

Radius: 14.8

Gravity: 0.64 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 3.67 AU - 4.89 AU

Year: 5630 Days

Day: 13.6 Hours

Environment

Temp: -212 °C

Axial Tilt: 21.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 48,913,663 km

• M1: 184,005 km (0.115 R)
• M2: 798,404 km (0.06 R)
• M3: 2,629,781 km (0.104 R)
• M4: 3,142,303 km (0.049 R)
• M5: 4,228,384 km (0.109 R)
• M6: 5,215,281 km (0.094 R)
• M7: 5,751,440 km (0.066 R)
• M8: 6,297,322 km (0.103 R)
• M9: 7,707,581 km (0.1 R)
• M10: 8,275,455 km (0.087 R)
• M11: 11,186,181 km (0.07 R)
• M12: 14,722,525 km (0.084 R)
• M13: 17,457,772 km (0.094 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.09 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 380.5

Radius: 7.4

Gravity: 6.95 G

Time & Orbit

Eccentricity (e): 0.245

Orbit Range: 6.11 AU - 10.07 AU

Year: 14630 Days

Day: 16.5 Hours

Environment

Temp: -235 °C

Axial Tilt: 16.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 48,913,663 km

• M1: 93,798 km (0.102 R)
• M2: 387,608 km (0.086 R)
• M3: 1,204,712 km (0.101 R)
• M4: 2,066,695 km (0.086 R)
• M5: 2,895,317 km (0.081 R)
• M6: 3,311,798 km (0.077 R)
• M7: 3,901,363 km (0.113 R)
• M8: 4,439,317 km (0.095 R)
• M9: 6,239,877 km (0.1 R)
• M10: 9,728,350 km (0.102 R)
• M11: 16,312,900 km (0.073 R)
• M12: 18,080,847 km (0.102 R)
• M13: 30,027,733 km (0.112 R)
• M14: 30,566,136 km (0.117 R)
• M15: 30,892,259 km (0.095 R)
• M16: 32,108,041 km (0.09 R)
• M17: 34,282,297 km (0.061 R)
• M18: 34,988,848 km (0.098 R)
• M19: 38,288,977 km (0.093 R)
• M20: 42,192,583 km (0.102 R)
• M21: 47,507,646 km (0.103 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.99 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 180.6

Radius: 5.2

Gravity: 6.68 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 7.66 AU - 12.32 AU

Year: 20076 Days

Day: 17.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 48,913,663 km

• M1: 71,957 km (0.113 R)
• M2: 308,920 km (0.093 R)
• M3: 1,591,422 km (0.076 R)
• M4: 1,934,300 km (0.099 R)
• M5: 3,261,832 km (0.063 R)
• M6: 3,761,938 km (0.116 R)
• M7: 4,516,061 km (0.119 R)
• M8: 5,637,596 km (0.064 R)
• M9: 5,811,728 km (0.103 R)
• M10: 7,012,849 km (0.091 R)
• M11: 7,714,014 km (0.026 R)
• M12: 8,460,807 km (0.108 R)
• M13: 8,828,518 km (0.051 R)
• M14: 9,399,833 km (0.102 R)
• M15: 15,289,202 km (0.083 R)
• M16: 20,838,086 km (0.078 R)
• M17: 22,279,012 km (0.119 R)
• M18: 23,966,626 km (0.113 R)
• M19: 24,332,542 km (0.07 R)
• M20: 25,452,432 km (0.092 R)
• M21: 27,895,066 km (0.08 R)
• M22: 29,852,853 km (0.065 R)
• M23: 36,875,875 km (0.079 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: 448 - 17,781 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit