🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.27 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.53 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.54

Radius: 1.83

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.045

Orbit Range: 0.51 AU - 0.55 AU

Year: 253 Days

Day: 23.3 Hours

Environment

Temp: -116 °C

Axial Tilt: 12.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.29

Radius: 1.39

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 0.55 AU - 0.65 AU

Year: 305 Days

Day: 27.9 Hours

Environment

Temp: -119 °C

Axial Tilt: 49.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 47,919,532 km

• M1: 171,439 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 147.1

Radius: 10.8

Gravity: 1.26 G

Time & Orbit

Eccentricity (e): 0.026

Orbit Range: 0.69 AU - 0.73 AU

Year: 392 Days

Day: 9.1 Hours

Environment

Temp: -148 °C

Axial Tilt: 22 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 47,919,532 km

• M1: 134,339 km (0.049 R)
• M2: 494,870 km (0.103 R)
• M3: 1,301,801 km (0.091 R)
• M4: 1,966,165 km (0.094 R)
• M5: 2,499,631 km (0.097 R)
• M6: 3,118,667 km (0.075 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 892.4

Radius: 12.8

Gravity: 5.45 G

Time & Orbit

Eccentricity (e): 0.227

Orbit Range: 0.56 AU - 0.88 AU

Year: 401 Days

Day: 10.7 Hours

Environment

Temp: -132 °C

Axial Tilt: 36.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 47,919,532 km

• M1: 159,172 km (0.051 R)
• M2: 685,457 km (0.109 R)
• M3: 1,136,495 km (0.098 R)
• M4: 1,534,725 km (0.09 R)
• M5: 2,207,466 km (0.058 R)
• M6: 2,832,785 km (0.045 R)
• M7: 3,648,393 km (0.107 R)
• M8: 5,728,252 km (0.119 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.52 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 624

Radius: 9.9

Gravity: 6.37 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 1.5 AU - 1.54 AU

Year: 1229 Days

Day: 9.8 Hours

Environment

Temp: -188 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 47,919,532 km

• M1: 124,017 km (0.119 R)
• M2: 455,226 km (0.097 R)
• M3: 1,020,407 km (0.109 R)
• M4: 1,419,684 km (0.119 R)
• M5: 1,748,949 km (0.075 R)
• M6: 2,652,370 km (0.097 R)
• M7: 3,019,334 km (0.109 R)
• M8: 4,004,585 km (0.089 R)
• M9: 4,382,769 km (0.073 R)
• M10: 5,599,747 km (0.111 R)
• M11: 6,980,237 km (0.111 R)
• M12: 7,868,100 km (0.108 R)
• M13: 9,714,138 km (0.091 R)
• M14: 10,178,190 km (0.097 R)
• M15: 10,984,373 km (0.105 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.02 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 766.2

Radius: 14.8

Gravity: 3.5 G

Time & Orbit

Eccentricity (e): 0.2

Orbit Range: 2.42 AU - 3.62 AU

Year: 3443 Days

Day: 5.3 Hours

Environment

Temp: -195 °C

Axial Tilt: 31.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 47,919,532 km

• M1: 184,305 km (0.107 R)
• M2: 656,286 km (0.092 R)
• M3: 1,278,463 km (0.042 R)
• M4: 1,760,019 km (0.104 R)
• M5: 2,293,036 km (0.12 R)
• M6: 2,767,411 km (0.119 R)
• M7: 3,516,747 km (0.062 R)
• M8: 4,723,852 km (0.115 R)
• M9: 5,476,329 km (0.057 R)
• M10: 6,106,286 km (0.081 R)
• M11: 6,663,089 km (0.092 R)
• M12: 7,349,893 km (0.1 R)
• M13: 8,049,413 km (0.078 R)
• M14: 10,133,909 km (0.064 R)
• M15: 11,172,418 km (0.09 R)
• M16: 11,739,843 km (0.09 R)
• M17: 13,904,374 km (0.074 R)
• M18: 15,775,245 km (0.119 R)
• M19: 17,284,837 km (0.097 R)
• M20: 18,706,017 km (0.031 R)
• M21: 20,655,277 km (0.098 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 380.3

Radius: 12.4

Gravity: 2.47 G

Time & Orbit

Eccentricity (e): 0.164

Orbit Range: 3.26 AU - 4.54 AU

Year: 5052 Days

Day: 10.3 Hours

Environment

Temp: -204 °C

Axial Tilt: 34.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 47,919,532 km

• M1: 156,180 km (0.104 R)
• M2: 611,257 km (0.117 R)
• M3: 1,063,042 km (0.082 R)
• M4: 1,495,680 km (0.107 R)
• M5: 3,468,277 km (0.057 R)
• M6: 4,000,247 km (0.105 R)
• M7: 5,518,965 km (0.115 R)
• M8: 7,860,770 km (0.104 R)
• M9: 11,805,067 km (0.114 R)
• M10: 13,549,977 km (0.095 R)
• M11: 14,355,561 km (0.096 R)
• M12: 18,260,215 km (0.069 R)
• M13: 19,494,248 km (0.093 R)
• M14: 20,003,180 km (0.083 R)
• M15: 22,128,218 km (0.031 R)
• M16: 23,316,324 km (0.03 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 98.1

Radius: 13.6

Gravity: 0.53 G

Time & Orbit

Eccentricity (e): 0.079

Orbit Range: 5.19 AU - 6.07 AU

Year: 8763 Days

Day: 6.2 Hours

Environment

Temp: -213 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 47,919,532 km

• M1: 169,195 km (0.096 R)
• M2: 874,848 km (0.057 R)
• M3: 1,410,110 km (0.068 R)
• M4: 2,032,586 km (0.087 R)
• M5: 2,535,983 km (0.111 R)
• M6: 3,001,532 km (0.115 R)
• M7: 4,779,951 km (0.041 R)
• M8: 5,707,907 km (0.093 R)
• M9: 6,842,906 km (0.115 R)
• M10: 7,854,935 km (0.103 R)
• M11: 8,501,797 km (0.078 R)
• M12: 9,369,315 km (0.081 R)
• M13: 9,863,436 km (0.05 R)
• M14: 10,495,487 km (0.086 R)
• M15: 13,156,684 km (0.074 R)
• M16: 17,689,799 km (0.059 R)
• M17: 19,346,146 km (0.116 R)

Planet 9 - Ice Giant

Semi-Major Axis: 5.97 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 70.6

Radius: 7.1

Gravity: 1.4 G

Time & Orbit

Eccentricity (e): 0.177

Orbit Range: 4.91 AU - 7.03 AU

Year: 9569 Days

Day: 20.7 Hours

Environment

Temp: -216 °C

Axial Tilt: 31.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 47,919,532 km

• M1: 88,712 km (0.117 R)
• M2: 322,832 km (0.085 R)
• M3: 1,641,837 km (0.038 R)
• M4: 1,965,118 km (0.036 R)
• M5: 3,606,655 km (0.03 R)
• M6: 4,177,371 km (0.063 R)
• M7: 7,999,746 km (0.116 R)
• M8: 16,252,013 km (0.115 R)
• M9: 21,563,486 km (0.094 R)

Planet 10 - Ice Giant

Semi-Major Axis: 7.6 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 362.3

Radius: 7

Gravity: 7.39 G

Time & Orbit

Eccentricity (e): 0.147

Orbit Range: 6.48 AU - 8.72 AU

Year: 13745 Days

Day: 19 Hours

Environment

Temp: -218 °C

Axial Tilt: 21.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 47,919,532 km

• M1: 87,515 km (0.108 R)
• M2: 361,428 km (0.095 R)
• M3: 603,328 km (0.061 R)
• M4: 1,159,683 km (0.116 R)
• M5: 1,967,062 km (0.104 R)
• M6: 2,451,460 km (0.118 R)
• M7: 3,102,660 km (0.093 R)
• M8: 3,335,733 km (0.097 R)
• M9: 4,161,663 km (0.1 R)
• M10: 6,357,760 km (0.092 R)
• M11: 7,958,607 km (0.071 R)
• M12: 8,308,516 km (0.067 R)
• M13: 9,761,710 km (0.072 R)
• M14: 12,803,184 km (0.087 R)
• M15: 16,776,504 km (0.067 R)
• M16: 19,157,354 km (0.083 R)
• M17: 27,141,542 km (0.119 R)
• M18: 28,946,889 km (0.112 R)
• M19: 32,906,296 km (0.114 R)
• M20: 35,423,878 km (0.119 R)
• M21: 45,244,530 km (0.049 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 479 - 20,067 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit