🌌 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: 0.23

Radius: 0.56

Gravity: 0.73 G

Time & Orbit

Eccentricity (e): 0.044

Orbit Range: 0.55 AU - 0.61 AU

Year: 285 Days

Day: 14.6 Hours

Environment

Temp: -118 °C

Axial Tilt: 0.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 392.6

Radius: 9

Gravity: 4.85 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 0.7 AU - 0.88 AU

Year: 453 Days

Day: 8.5 Hours

Environment

Temp: -142 °C

Axial Tilt: 24.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 7,689,688 km

• M1: 113,994 km (0.084 R)
• M2: 448,195 km (0.108 R)
• M3: 1,230,143 km (0.112 R)
• M4: 1,567,786 km (0.088 R)
• M5: 1,975,141 km (0.066 R)
• M6: 2,276,431 km (0.093 R)
• M7: 3,141,406 km (0.114 R)
• M8: 3,485,481 km (0.112 R)
• M9: 3,817,887 km (0.072 R)
• M10: 4,263,240 km (0.12 R)
• M11: 4,828,570 km (0.067 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 933.7

Radius: 11.3

Gravity: 7.31 G

Time & Orbit

Eccentricity (e): 0.143

Orbit Range: 0.73 AU - 0.97 AU

Year: 506 Days

Day: 11.2 Hours

Environment

Temp: -145 °C

Axial Tilt: 19.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 7,689,688 km

• M1: 140,622 km (0.115 R)
• M2: 501,751 km (0.072 R)
• M3: 1,047,933 km (0.103 R)
• M4: 1,454,091 km (0.076 R)
• M5: 1,823,448 km (0.075 R)
• M6: 2,372,622 km (0.098 R)
• M7: 2,801,819 km (0.104 R)
• M8: 4,396,831 km (0.056 R)
• M9: 5,478,124 km (0.101 R)
• M10: 7,164,092 km (0.086 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 770.2

Radius: 11.3

Gravity: 6.03 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 0.82 AU - 0.98 AU

Year: 551 Days

Day: 12.9 Hours

Environment

Temp: -161 °C

Axial Tilt: 34 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 7,689,688 km

• M1: 140,472 km (0.088 R)
• M2: 547,678 km (0.098 R)
• M3: 904,020 km (0.038 R)
• M4: 1,261,409 km (0.09 R)
• M5: 2,093,622 km (0.094 R)
• M6: 2,684,983 km (0.096 R)
• M7: 3,359,819 km (0.074 R)
• M8: 3,738,002 km (0.117 R)
• M9: 4,115,587 km (0.117 R)
• M10: 4,534,311 km (0.046 R)
• M11: 5,581,497 km (0.11 R)
• M12: 6,171,810 km (0.071 R)
• M13: 6,561,662 km (0.12 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 140.9

Radius: 11.1

Gravity: 1.14 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 0.97 AU - 1.05 AU

Year: 655 Days

Day: 9 Hours

Environment

Temp: -163 °C

Axial Tilt: 13 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 7,689,688 km

• M1: 138,079 km (0.058 R)
• M2: 560,992 km (0.105 R)
• M3: 1,111,363 km (0.116 R)
• M4: 2,296,178 km (0.082 R)
• M5: 2,689,022 km (0.094 R)
• M6: 3,045,663 km (0.093 R)
• M7: 3,555,792 km (0.048 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 306.2

Radius: 9.8

Gravity: 3.19 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 1.36 AU - 1.54 AU

Year: 1127 Days

Day: 7.8 Hours

Environment

Temp: -172 °C

Axial Tilt: 24.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 7,689,688 km

• M1: 123,269 km (0.086 R)
• M2: 528,529 km (0.105 R)
• M3: 969,544 km (0.093 R)
• M4: 1,293,722 km (0.069 R)
• M5: 1,827,188 km (0.101 R)
• M6: 2,321,759 km (0.085 R)
• M7: 2,855,524 km (0.062 R)
• M8: 3,321,522 km (0.112 R)
• M9: 3,808,313 km (0.112 R)
• M10: 4,122,917 km (0.065 R)
• M11: 4,942,714 km (0.109 R)
• M12: 5,712,095 km (0.116 R)
• M13: 6,391,868 km (0.118 R)
• M14: 7,350,491 km (0.101 R)
• M15: 7,912,231 km (0.119 R)
• M16: 8,253,015 km (0.054 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.34 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 818.6

Radius: 10.8

Gravity: 7.02 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 2.25 AU - 2.43 AU

Year: 2311 Days

Day: 7.9 Hours

Environment

Temp: -203 °C

Axial Tilt: 31.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 7,689,688 km

• M1: 134,638 km (0.051 R)
• M2: 492,327 km (0.065 R)
• M3: 1,203,066 km (0.104 R)
• M4: 1,646,773 km (0.107 R)
• M5: 2,059,215 km (0.094 R)
• M6: 2,427,525 km (0.059 R)
• M7: 2,808,999 km (0.081 R)
• M8: 3,826,564 km (0.032 R)
• M9: 4,222,699 km (0.108 R)
• M10: 4,602,378 km (0.078 R)
• M11: 4,981,908 km (0.085 R)
• M12: 7,595,383 km (0.058 R)
• M13: 8,517,654 km (0.108 R)
• M14: 10,094,565 km (0.077 R)
• M15: 10,469,906 km (0.03 R)
• M16: 11,208,770 km (0.116 R)
• M17: 12,233,665 km (0.087 R)
• M18: 14,706,518 km (0.108 R)
• M19: 15,287,406 km (0.027 R)
• M20: 16,650,542 km (0.113 R)
• M21: 17,441,915 km (0.06 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 10.6

Radius: 9.9

Gravity: 0.11 G

Time & Orbit

Eccentricity (e): 0.107

Orbit Range: 3.57 AU - 4.43 AU

Year: 5165 Days

Day: 6.8 Hours

Environment

Temp: -216 °C

Axial Tilt: 118.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 7,689,688 km

• M1: 137,181 km (0.114 R)
• M2: 589,416 km (0.105 R)
• M3: 1,653,505 km (0.107 R)
• M4: 2,888,884 km (0.114 R)
• M5: 4,279,845 km (0.042 R)
• M6: 4,737,166 km (0.052 R)

Kuiper Belt

Range: 30 - 53 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 302 - 12,034 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit