🌌 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: 0.57 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.62

Radius: 0.83

Gravity: 0.9 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 0.51 AU - 0.63 AU

Year: 278 Days

Day: 44.6 Hours

Environment

Temp: -131 °C

Axial Tilt: 33.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.72

Radius: 1.24

Gravity: 1.12 G

Time & Orbit

Eccentricity (e): 0.215

Orbit Range: 0.49 AU - 0.75 AU

Year: 315 Days

Day: 44.4 Hours

Environment

Temp: -125 °C

Axial Tilt: 14.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.66 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.65

Radius: 1.68

Gravity: 1.29 G

Time & Orbit

Eccentricity (e): 0.24

Orbit Range: 0.5 AU - 0.82 AU

Year: 346 Days

Day: 13.9 Hours

Environment

Temp: -125 °C

Axial Tilt: 7.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 72,440,673 km

• M1: 300,692 km (0.074 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 585.3

Radius: 13.7

Gravity: 3.12 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 0.56 AU - 0.86 AU

Year: 386 Days

Day: 5.2 Hours

Environment

Temp: -134 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 72,440,673 km

• M1: 170,392 km (0.098 R)
• M2: 699,071 km (0.102 R)
• M3: 1,403,677 km (0.04 R)
• M4: 2,265,809 km (0.047 R)
• M5: 3,798,589 km (0.114 R)
• M6: 5,077,801 km (0.096 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.53 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 106.9

Radius: 14.1

Gravity: 0.54 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 1.46 AU - 1.6 AU

Year: 1222 Days

Day: 15 Hours

Environment

Temp: -187 °C

Axial Tilt: 18.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 72,440,673 km

• M1: 177,722 km (0.068 R)
• M2: 639,680 km (0.094 R)
• M3: 1,463,965 km (0.115 R)
• M4: 2,559,470 km (0.118 R)
• M5: 3,074,087 km (0.104 R)
• M6: 3,983,642 km (0.12 R)
• M7: 4,832,011 km (0.111 R)
• M8: 5,324,188 km (0.077 R)
• M9: 6,189,462 km (0.113 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 538.8

Radius: 12.5

Gravity: 3.45 G

Time & Orbit

Eccentricity (e): 0.068

Orbit Range: 2.56 AU - 2.94 AU

Year: 2945 Days

Day: 12.6 Hours

Environment

Temp: -205 °C

Axial Tilt: 33.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 72,440,673 km

• M1: 155,432 km (0.108 R)
• M2: 559,496 km (0.117 R)
• M3: 1,077,105 km (0.069 R)
• M4: 1,494,483 km (0.06 R)
• M5: 1,937,592 km (0.107 R)
• M6: 2,554,982 km (0.082 R)
• M7: 3,047,757 km (0.036 R)
• M8: 4,372,895 km (0.078 R)
• M9: 5,036,512 km (0.075 R)
• M10: 5,590,024 km (0.042 R)
• M11: 7,138,362 km (0.089 R)
• M12: 7,559,031 km (0.104 R)
• M13: 8,253,614 km (0.116 R)
• M14: 8,853,352 km (0.119 R)
• M15: 10,480,228 km (0.084 R)
• M16: 11,919,061 km (0.063 R)
• M17: 12,383,861 km (0.073 R)
• M18: 15,934,268 km (0.113 R)
• M19: 19,235,743 km (0.09 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 158.1

Radius: 12.2

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 3.5 AU - 4 AU

Year: 4689 Days

Day: 11.7 Hours

Environment

Temp: -216 °C

Axial Tilt: 27.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 72,440,673 km

• M1: 151,692 km (0.077 R)
• M2: 701,614 km (0.052 R)
• M3: 1,117,197 km (0.118 R)
• M4: 1,560,306 km (0.086 R)
• M5: 2,013,587 km (0.041 R)
• M6: 2,499,332 km (0.114 R)
• M7: 2,984,178 km (0.06 R)
• M8: 3,496,401 km (0.085 R)
• M9: 4,635,290 km (0.071 R)
• M10: 5,757,274 km (0.119 R)
• M11: 6,395,608 km (0.072 R)
• M12: 8,859,186 km (0.091 R)
• M13: 10,654,360 km (0.107 R)
• M14: 13,541,450 km (0.117 R)
• M15: 14,212,247 km (0.103 R)
• M16: 14,905,184 km (0.088 R)
• M17: 15,962,093 km (0.073 R)
• M18: 16,508,873 km (0.095 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 596.9

Radius: 12.2

Gravity: 4.01 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 3.68 AU - 5.06 AU

Year: 5898 Days

Day: 6.1 Hours

Environment

Temp: -214 °C

Axial Tilt: 19.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 72,440,673 km

• M1: 151,692 km (0.117 R)
• M2: 589,266 km (0.096 R)
• M3: 1,456,335 km (0.083 R)
• M4: 3,210,520 km (0.099 R)
• M5: 5,226,351 km (0.118 R)
• M6: 6,469,659 km (0.111 R)
• M7: 9,661,928 km (0.099 R)
• M8: 10,228,904 km (0.091 R)
• M9: 11,097,320 km (0.081 R)
• M10: 14,275,975 km (0.101 R)
• M11: 17,120,728 km (0.082 R)
• M12: 27,026,501 km (0.082 R)
• M13: 27,716,297 km (0.049 R)

Planet 9 - Ice Giant

Semi-Major Axis: 9 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 778

Radius: 5.3

Gravity: 27.7 G

Time & Orbit

Eccentricity (e): 0.185

Orbit Range: 7.34 AU - 10.67 AU

Year: 17433 Days

Day: 18.6 Hours

Environment

Temp: -223 °C

Axial Tilt: 17.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (27)

Outer Limit: 72,440,673 km

• M1: 66,122 km (0.102 R)
• M2: 310,116 km (0.096 R)
• M3: 586,274 km (0.085 R)
• M4: 755,469 km (0.111 R)
• M5: 1,671,756 km (0.063 R)
• M6: 1,923,978 km (0.087 R)
• M7: 2,738,389 km (0.111 R)
• M8: 3,672,777 km (0.113 R)
• M9: 4,458,914 km (0.085 R)
• M10: 5,201,518 km (0.076 R)
• M11: 5,389,862 km (0.118 R)
• M12: 7,822,473 km (0.12 R)
• M13: 9,666,566 km (0.112 R)
• M14: 10,901,945 km (0.081 R)
• M15: 13,188,997 km (0.088 R)
• M16: 15,620,860 km (0.091 R)
• M17: 15,855,729 km (0.062 R)
• M18: 17,650,903 km (0.091 R)
• M19: 21,158,375 km (0.037 R)
• M20: 26,079,247 km (0.061 R)
• M21: 27,079,608 km (0.068 R)
• M22: 31,090,177 km (0.118 R)
• M23: 41,299,484 km (0.08 R)
• M24: 42,352,803 km (0.035 R)
• M25: 43,116,051 km (0.068 R)
• M26: 62,707,987 km (0.117 R)
• M27: 64,902,288 km (0.074 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 221 - 14,463 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit