🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.26

Radius: 1.79

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 0.56 AU - 0.65 AU

Year: 305 Days

Day: 27.6 Hours

Environment

Temp: -124 °C

Axial Tilt: 15.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 53,186,743 km

• M1: 41,887 km (0.068 R)
• M2: 290,070 km (0.108 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 780.2

Radius: 8.6

Gravity: 10.55 G

Time & Orbit

Eccentricity (e): 0.117

Orbit Range: 0.76 AU - 0.96 AU

Year: 523 Days

Day: 7 Hours

Environment

Temp: -145 °C

Axial Tilt: 17.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 53,186,743 km

• M1: 106,962 km (0.082 R)
• M2: 400,025 km (0.09 R)
• M3: 698,323 km (0.072 R)
• M4: 1,010,982 km (0.096 R)
• M5: 1,279,361 km (0.073 R)
• M6: 1,703,022 km (0.035 R)
• M7: 2,009,399 km (0.075 R)
• M8: 2,421,690 km (0.062 R)
• M9: 3,230,416 km (0.083 R)
• M10: 3,584,664 km (0.089 R)
• M11: 4,616,291 km (0.099 R)
• M12: 4,951,690 km (0.052 R)
• M13: 5,337,502 km (0.113 R)
• M14: 5,671,255 km (0.06 R)
• M15: 5,963,121 km (0.115 R)
• M16: 6,245,711 km (0.119 R)
• M17: 6,616,714 km (0.111 R)
• M18: 7,002,377 km (0.091 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 286.5

Radius: 12.7

Gravity: 1.78 G

Time & Orbit

Eccentricity (e): 0.109

Orbit Range: 1.76 AU - 2.2 AU

Year: 1828 Days

Day: 8 Hours

Environment

Temp: -189 °C

Axial Tilt: 21.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 53,186,743 km

• M1: 157,975 km (0.085 R)
• M2: 578,345 km (0.09 R)
• M3: 2,094,071 km (0.08 R)
• M4: 3,073,488 km (0.08 R)
• M5: 3,613,387 km (0.104 R)
• M6: 4,569,467 km (0.069 R)
• M7: 5,499,517 km (0.112 R)
• M8: 6,390,372 km (0.101 R)
• M9: 8,023,981 km (0.065 R)
• M10: 8,654,087 km (0.062 R)
• M11: 9,465,506 km (0.11 R)
• M12: 10,295,325 km (0.082 R)
• M13: 10,973,752 km (0.105 R)
• M14: 11,374,824 km (0.084 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 529.9

Radius: 14.5

Gravity: 2.52 G

Time & Orbit

Eccentricity (e): 0.016

Orbit Range: 2.75 AU - 2.83 AU

Year: 3057 Days

Day: 13.3 Hours

Environment

Temp: -202 °C

Axial Tilt: 16.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 53,186,743 km

• M1: 180,265 km (0.097 R)
• M2: 810,671 km (0.061 R)
• M3: 2,131,620 km (0.084 R)
• M4: 2,820,668 km (0.097 R)
• M5: 3,490,567 km (0.098 R)
• M6: 4,081,329 km (0.083 R)
• M7: 6,457,392 km (0.088 R)
• M8: 7,202,988 km (0.118 R)
• M9: 8,395,582 km (0.107 R)
• M10: 9,534,770 km (0.028 R)
• M11: 10,426,224 km (0.113 R)
• M12: 11,011,301 km (0.095 R)
• M13: 11,659,359 km (0.078 R)
• M14: 12,810,664 km (0.074 R)
• M15: 13,300,896 km (0.094 R)
• M16: 14,271,936 km (0.086 R)
• M17: 15,790,953 km (0.075 R)
• M18: 16,511,416 km (0.084 R)
• M19: 17,361,431 km (0.103 R)
• M20: 18,747,755 km (0.077 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.49 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 147.8

Radius: 12.7

Gravity: 0.92 G

Time & Orbit

Eccentricity (e): 0.228

Orbit Range: 2.69 AU - 4.29 AU

Year: 4277 Days

Day: 14.2 Hours

Environment

Temp: -204 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 53,186,743 km

• M1: 157,975 km (0.077 R)
• M2: 844,929 km (0.064 R)
• M3: 1,313,170 km (0.087 R)
• M4: 2,378,457 km (0.086 R)
• M5: 2,861,658 km (0.053 R)
• M6: 3,494,307 km (0.08 R)
• M7: 4,103,769 km (0.064 R)
• M8: 5,106,523 km (0.105 R)
• M9: 5,797,217 km (0.098 R)
• M10: 7,280,779 km (0.115 R)
• M11: 9,533,573 km (0.118 R)
• M12: 11,628,841 km (0.107 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 590.7

Radius: 13.9

Gravity: 3.06 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 3.31 AU - 4.69 AU

Year: 5248 Days

Day: 8.4 Hours

Environment

Temp: -220 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 53,186,743 km

• M1: 175,478 km (0.105 R)
• M2: 628,461 km (0.095 R)
• M3: 1,896,602 km (0.032 R)
• M4: 3,178,506 km (0.119 R)
• M5: 11,418,955 km (0.113 R)
• M6: 12,772,965 km (0.103 R)
• M7: 17,726,899 km (0.116 R)
• M8: 23,228,061 km (0.071 R)
• M9: 25,876,692 km (0.1 R)
• M10: 26,610,320 km (0.099 R)
• M11: 28,807,613 km (0.095 R)
• M12: 29,507,432 km (0.041 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.29 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 639.6

Radius: 13.6

Gravity: 3.46 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 4.01 AU - 4.57 AU

Year: 5829 Days

Day: 7.4 Hours

Environment

Temp: -207 °C

Axial Tilt: 11.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 53,186,743 km

• M1: 169,345 km (0.099 R)
• M2: 987,196 km (0.098 R)
• M3: 1,504,655 km (0.115 R)
• M4: 2,054,128 km (0.117 R)
• M5: 2,493,647 km (0.046 R)
• M6: 2,996,595 km (0.119 R)
• M7: 3,743,388 km (0.12 R)
• M8: 4,357,636 km (0.089 R)
• M9: 6,646,783 km (0.111 R)
• M10: 7,697,259 km (0.115 R)
• M11: 8,378,977 km (0.099 R)
• M12: 8,815,204 km (0.077 R)
• M13: 10,714,349 km (0.035 R)
• M14: 11,760,188 km (0.113 R)
• M15: 12,308,015 km (0.077 R)
• M16: 13,348,020 km (0.099 R)
• M17: 15,425,336 km (0.052 R)
• M18: 16,143,106 km (0.093 R)
• M19: 18,967,364 km (0.085 R)
• M20: 22,407,966 km (0.047 R)
• M21: 23,641,699 km (0.052 R)
• M22: 25,247,034 km (0.118 R)
• M23: 26,413,299 km (0.082 R)
• M24: 27,268,101 km (0.093 R)
• M25: 29,668,250 km (0.096 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.61 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 340.7

Radius: 7.9

Gravity: 5.46 G

Time & Orbit

Eccentricity (e): 0.085

Orbit Range: 7.88 AU - 9.34 AU

Year: 16573 Days

Day: 22.7 Hours

Environment

Temp: -226 °C

Axial Tilt: 8.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 53,186,743 km

• M1: 98,286 km (0.113 R)
• M2: 462,407 km (0.119 R)
• M3: 1,649,466 km (0.083 R)
• M4: 2,184,877 km (0.073 R)
• M5: 2,658,653 km (0.064 R)
• M6: 3,470,521 km (0.112 R)
• M7: 5,752,038 km (0.103 R)
• M8: 6,734,298 km (0.118 R)
• M9: 7,391,930 km (0.088 R)
• M10: 8,457,815 km (0.11 R)
• M11: 9,371,559 km (0.059 R)
• M12: 11,281,026 km (0.032 R)
• M13: 13,820,300 km (0.092 R)
• M14: 15,851,839 km (0.039 R)
• M15: 18,939,090 km (0.107 R)
• M16: 20,162,203 km (0.109 R)
• M17: 21,610,908 km (0.098 R)
• M18: 23,127,980 km (0.118 R)
• M19: 38,030,920 km (0.094 R)
• M20: 44,616,219 km (0.078 R)
• M21: 53,186,681 km (0.092 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 306 - 18,505 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit