🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.26 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.24

Radius: 1.09

Gravity: 1.04 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 0.46 AU - 0.58 AU

Year: 238 Days

Day: 41.8 Hours

Environment

Temp: -117 °C

Axial Tilt: 23.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.21

Radius: 0.54

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.224

Orbit Range: 0.43 AU - 0.67 AU

Year: 259 Days

Day: 13.2 Hours

Environment

Temp: -126 °C

Axial Tilt: 1.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 9,382,352 km

• M1: 116,537 km (0.057 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.79 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 971.2

Radius: 14

Gravity: 4.96 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 0.72 AU - 0.86 AU

Year: 446 Days

Day: 13 Hours

Environment

Temp: -151 °C

Axial Tilt: 34.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 9,382,352 km

• M1: 174,132 km (0.095 R)
• M2: 744,249 km (0.08 R)
• M3: 1,266,645 km (0.097 R)
• M4: 2,115,763 km (0.054 R)
• M5: 2,607,790 km (0.106 R)
• M6: 3,441,798 km (0.103 R)
• M7: 3,935,770 km (0.07 R)
• M8: 5,003,450 km (0.042 R)
• M9: 5,888,920 km (0.036 R)
• M10: 6,522,617 km (0.054 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 829.9

Radius: 10.9

Gravity: 6.99 G

Time & Orbit

Eccentricity (e): 0.085

Orbit Range: 0.97 AU - 1.15 AU

Year: 694 Days

Day: 10.8 Hours

Environment

Temp: -167 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 9,382,352 km

• M1: 135,536 km (0.115 R)
• M2: 538,403 km (0.116 R)
• M3: 940,821 km (0.111 R)
• M4: 1,465,461 km (0.107 R)
• M5: 2,025,705 km (0.111 R)
• M6: 2,457,145 km (0.094 R)
• M7: 2,913,419 km (0.072 R)
• M8: 5,982,718 km (0.117 R)
• M9: 6,493,595 km (0.111 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 624.3

Radius: 14.3

Gravity: 3.05 G

Time & Orbit

Eccentricity (e): 0.113

Orbit Range: 0.97 AU - 1.21 AU

Year: 724 Days

Day: 13.3 Hours

Environment

Temp: -154 °C

Axial Tilt: 5.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 9,382,352 km

• M1: 178,620 km (0.057 R)
• M2: 705,952 km (0.112 R)
• M3: 1,224,608 km (0.089 R)
• M4: 1,916,798 km (0.097 R)
• M5: 2,530,149 km (0.103 R)
• M6: 3,026,365 km (0.079 R)
• M7: 3,822,974 km (0.04 R)
• M8: 5,267,790 km (0.094 R)
• M9: 7,008,361 km (0.066 R)
• M10: 8,045,972 km (0.098 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 852.7

Radius: 12.5

Gravity: 5.46 G

Time & Orbit

Eccentricity (e): 0.008

Orbit Range: 1.12 AU - 1.14 AU

Year: 764 Days

Day: 5.5 Hours

Environment

Temp: -175 °C

Axial Tilt: 12 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 9,382,352 km

• M1: 155,731 km (0.111 R)
• M2: 660,175 km (0.112 R)
• M3: 1,269,039 km (0.073 R)
• M4: 1,917,845 km (0.031 R)
• M5: 2,415,856 km (0.065 R)
• M6: 3,272,453 km (0.091 R)
• M7: 5,317,456 km (0.05 R)
• M8: 5,960,428 km (0.107 R)
• M9: 7,262,079 km (0.098 R)
• M10: 8,614,294 km (0.05 R)
• M11: 9,064,584 km (0.104 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.35 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 634.3

Radius: 11.8

Gravity: 4.56 G

Time & Orbit

Eccentricity (e): 0.004

Orbit Range: 1.34 AU - 1.36 AU

Year: 997 Days

Day: 6 Hours

Environment

Temp: -181 °C

Axial Tilt: 0.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 9,382,352 km

• M1: 148,850 km (0.08 R)
• M2: 532,419 km (0.1 R)
• M3: 961,765 km (0.071 R)
• M4: 1,620,743 km (0.105 R)
• M5: 2,098,559 km (0.07 R)
• M6: 2,993,154 km (0.065 R)
• M7: 3,660,510 km (0.074 R)
• M8: 4,046,024 km (0.097 R)
• M9: 4,492,873 km (0.057 R)
• M10: 4,954,382 km (0.049 R)
• M11: 6,576,921 km (0.069 R)
• M12: 7,126,394 km (0.08 R)
• M13: 7,534,048 km (0.086 R)
• M14: 8,502,096 km (0.067 R)
• M15: 9,182,916 km (0.105 R)

Planet 8 - Gas Giant

Semi-Major Axis: 1.4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 463.1

Radius: 11.1

Gravity: 3.76 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 1.14 AU - 1.66 AU

Year: 1053 Days

Day: 7.7 Hours

Environment

Temp: -180 °C

Axial Tilt: 35.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 9,382,352 km

• M1: 138,079 km (0.05 R)
• M2: 641,326 km (0.096 R)
• M3: 1,205,759 km (0.047 R)
• M4: 1,618,051 km (0.078 R)
• M5: 2,027,051 km (0.115 R)
• M6: 2,449,516 km (0.119 R)
• M7: 2,905,939 km (0.11 R)
• M8: 3,474,710 km (0.067 R)
• M9: 3,823,572 km (0.094 R)
• M10: 4,196,071 km (0.109 R)
• M11: 4,978,468 km (0.093 R)
• M12: 5,481,416 km (0.107 R)
• M13: 5,997,528 km (0.115 R)
• M14: 6,480,879 km (0.114 R)
• M15: 7,012,849 km (0.07 R)
• M16: 7,742,887 km (0.114 R)
• M17: 8,189,735 km (0.046 R)
• M18: 8,838,691 km (0.119 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 482 - 10,496 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit