🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.44

Radius: 1.82

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 0.53 AU - 0.73 AU

Year: 323 Days

Day: 27.7 Hours

Environment

Temp: -140 °C

Axial Tilt: 29.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 135.9

Radius: 10.5

Gravity: 1.23 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 0.83 AU - 0.93 AU

Year: 533 Days

Day: 9.4 Hours

Environment

Temp: -148 °C

Axial Tilt: 6.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (5)

Outer Limit: 84,441,713 km

• M1: 136,882 km (0.091 R)
• M2: 515,514 km (0.103 R)
• M3: 986,897 km (0.117 R)
• M4: 1,472,193 km (0.042 R)
• M5: 2,172,909 km (0.042 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 679.3

Radius: 8.7

Gravity: 8.97 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 0.89 AU - 1.07 AU

Year: 626 Days

Day: 5.1 Hours

Environment

Temp: -160 °C

Axial Tilt: 39.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 84,441,713 km

• M1: 108,159 km (0.12 R)
• M2: 443,408 km (0.083 R)
• M3: 771,925 km (0.073 R)
• M4: 1,358,049 km (0.085 R)
• M5: 2,010,895 km (0.103 R)
• M6: 2,624,395 km (0.116 R)
• M7: 2,928,229 km (0.057 R)
• M8: 3,280,981 km (0.077 R)
• M9: 3,594,089 km (0.119 R)
• M10: 3,870,247 km (0.083 R)
• M11: 4,851,309 km (0.074 R)
• M12: 5,206,903 km (0.111 R)
• M13: 6,319,762 km (0.1 R)
• M14: 6,890,328 km (0.088 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 449.6

Radius: 10.3

Gravity: 4.24 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 1.68 AU - 1.92 AU

Year: 1559 Days

Day: 7.4 Hours

Environment

Temp: -191 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 84,441,713 km

• M1: 130,150 km (0.034 R)
• M2: 480,359 km (0.076 R)
• M3: 1,006,345 km (0.052 R)
• M4: 1,481,767 km (0.034 R)
• M5: 2,180,239 km (0.092 R)
• M6: 2,905,340 km (0.037 R)
• M7: 3,816,391 km (0.065 R)
• M8: 4,347,464 km (0.083 R)
• M9: 5,084,981 km (0.098 R)
• M10: 5,948,011 km (0.048 R)
• M11: 7,775,499 km (0.095 R)
• M12: 8,209,333 km (0.12 R)
• M13: 9,066,379 km (0.112 R)
• M14: 10,397,202 km (0.052 R)
• M15: 10,957,894 km (0.098 R)
• M16: 11,678,059 km (0.068 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 304.9

Radius: 13.8

Gravity: 1.6 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 2 AU - 2.8 AU

Year: 2401 Days

Day: 13.5 Hours

Environment

Temp: -200 °C

Axial Tilt: 49.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 84,441,713 km

• M1: 171,589 km (0.069 R)
• M2: 682,615 km (0.079 R)
• M3: 1,198,877 km (0.096 R)
• M4: 1,716,037 km (0.113 R)
• M5: 2,215,544 km (0.105 R)
• M6: 2,690,368 km (0.04 R)
• M7: 3,188,080 km (0.062 R)
• M8: 3,832,398 km (0.066 R)
• M9: 5,127,766 km (0.086 R)
• M10: 6,326,195 km (0.085 R)
• M11: 7,483,783 km (0.118 R)
• M12: 7,984,637 km (0.099 R)
• M13: 10,049,686 km (0.114 R)
• M14: 10,764,764 km (0.082 R)
• M15: 11,260,082 km (0.111 R)
• M16: 12,182,652 km (0.111 R)
• M17: 12,877,684 km (0.113 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 894.5

Radius: 11.9

Gravity: 6.32 G

Time & Orbit

Eccentricity (e): 0.148

Orbit Range: 4.61 AU - 6.21 AU

Year: 8125 Days

Day: 12.3 Hours

Environment

Temp: -211 °C

Axial Tilt: 11.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 84,441,713 km

• M1: 157,826 km (0.097 R)
• M2: 587,321 km (0.03 R)
• M3: 1,903,783 km (0.101 R)
• M4: 2,451,161 km (0.106 R)
• M5: 2,971,612 km (0.088 R)
• M6: 3,565,067 km (0.105 R)
• M7: 5,082,887 km (0.086 R)
• M8: 5,831,774 km (0.086 R)
• M9: 6,250,947 km (0.059 R)
• M10: 6,955,852 km (0.047 R)
• M11: 7,921,357 km (0.064 R)
• M12: 9,629,765 km (0.103 R)
• M13: 10,117,603 km (0.106 R)
• M14: 10,828,193 km (0.078 R)
• M15: 14,382,339 km (0.114 R)
• M16: 15,346,647 km (0.116 R)
• M17: 16,148,791 km (0.051 R)
• M18: 17,332,708 km (0.073 R)
• M19: 18,949,562 km (0.044 R)
• M20: 21,560,344 km (0.037 R)
• M21: 23,254,540 km (0.108 R)
• M22: 24,492,163 km (0.089 R)
• M23: 25,587,519 km (0.111 R)
• M24: 26,906,224 km (0.099 R)
• M25: 30,923,825 km (0.101 R)
• M26: 31,987,466 km (0.051 R)
• M27: 35,439,736 km (0.066 R)
• M28: 38,035,408 km (0.065 R)
• M29: 39,379,695 km (0.114 R)
• M30: 44,134,065 km (0.109 R)
• M31: 45,345,807 km (0.101 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 598.5

Radius: 13.9

Gravity: 3.1 G

Time & Orbit

Eccentricity (e): 0.211

Orbit Range: 4.28 AU - 6.58 AU

Year: 8170 Days

Day: 6.3 Hours

Environment

Temp: -215 °C

Axial Tilt: 26.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 84,441,713 km

• M1: 175,478 km (0.072 R)
• M2: 1,175,839 km (0.119 R)
• M3: 1,658,592 km (0.082 R)
• M4: 2,611,680 km (0.112 R)
• M5: 3,343,064 km (0.053 R)
• M6: 3,806,368 km (0.077 R)
• M7: 4,312,757 km (0.069 R)
• M8: 5,909,864 km (0.106 R)
• M9: 6,806,853 km (0.1 R)
• M10: 8,362,072 km (0.082 R)
• M11: 14,444,123 km (0.041 R)
• M12: 15,940,850 km (0.117 R)
• M13: 17,538,705 km (0.116 R)
• M14: 18,305,843 km (0.117 R)
• M15: 18,805,500 km (0.085 R)
• M16: 20,665,001 km (0.107 R)
• M17: 23,303,459 km (0.075 R)
• M18: 24,660,461 km (0.067 R)
• M19: 25,623,572 km (0.104 R)
• M20: 28,855,185 km (0.025 R)
• M21: 30,121,830 km (0.104 R)
• M22: 31,629,029 km (0.075 R)
• M23: 33,503,341 km (0.08 R)
• M24: 34,576,107 km (0.077 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 871.9

Radius: 7.1

Gravity: 17.3 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 9.16 AU - 11.04 AU

Year: 20725 Days

Day: 18.1 Hours

Environment

Temp: -239 °C

Axial Tilt: 31.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (32)

Outer Limit: 84,441,713 km

• M1: 88,263 km (0.036 R)
• M2: 324,777 km (0.032 R)
• M3: 676,033 km (0.112 R)
• M4: 1,088,025 km (0.117 R)
• M5: 2,124,439 km (0.117 R)
• M6: 4,292,113 km (0.089 R)
• M7: 6,795,034 km (0.064 R)
• M8: 7,176,359 km (0.111 R)
• M9: 9,243,353 km (0.068 R)
• M10: 9,652,354 km (0.087 R)
• M11: 12,364,414 km (0.108 R)
• M12: 15,383,448 km (0.078 R)
• M13: 17,062,684 km (0.082 R)
• M14: 19,423,937 km (0.059 R)
• M15: 19,901,603 km (0.06 R)
• M16: 22,304,893 km (0.08 R)
• M17: 23,901,252 km (0.116 R)
• M18: 31,968,317 km (0.117 R)
• M19: 33,038,241 km (0.087 R)
• M20: 34,409,156 km (0.073 R)
• M21: 34,827,581 km (0.06 R)
• M22: 40,118,409 km (0.108 R)
• M23: 48,845,350 km (0.101 R)
• M24: 51,163,968 km (0.112 R)
• M25: 56,019,167 km (0.113 R)
• M26: 57,572,741 km (0.098 R)
• M27: 57,965,585 km (0.034 R)
• M28: 63,864,378 km (0.096 R)
• M29: 64,285,347 km (0.065 R)
• M30: 71,954,930 km (0.097 R)
• M31: 72,182,618 km (0.096 R)
• M32: 83,936,672 km (0.051 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 537 - 17,266 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit