🌌 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: 1.2

Radius: 1.08

Gravity: 1.03 G

Time & Orbit

Eccentricity (e): 0.019

Orbit Range: 0.51 AU - 0.53 AU

Year: 242 Days

Day: 43.5 Hours

Environment

Temp: -121 °C

Axial Tilt: 34.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 946

Radius: 9.7

Gravity: 10.05 G

Time & Orbit

Eccentricity (e): 0.247

Orbit Range: 0.75 AU - 1.25 AU

Year: 646 Days

Day: 13 Hours

Environment

Temp: -155 °C

Axial Tilt: 30 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 54,966,219 km

• M1: 120,576 km (0.093 R)
• M2: 634,744 km (0.084 R)
• M3: 1,318,556 km (0.097 R)
• M4: 1,764,806 km (0.065 R)
• M5: 2,268,951 km (0.109 R)
• M6: 2,600,310 km (0.109 R)
• M7: 4,094,045 km (0.119 R)
• M8: 4,539,248 km (0.095 R)
• M9: 5,159,032 km (0.119 R)
• M10: 5,545,892 km (0.066 R)
• M11: 7,111,135 km (0.119 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.48 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 493.8

Radius: 8.9

Gravity: 6.23 G

Time & Orbit

Eccentricity (e): 0.013

Orbit Range: 1.46 AU - 1.5 AU

Year: 1163 Days

Day: 7.7 Hours

Environment

Temp: -179 °C

Axial Tilt: 1.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 54,966,219 km

• M1: 110,702 km (0.104 R)
• M2: 552,315 km (0.073 R)
• M3: 1,287,589 km (0.091 R)
• M4: 1,696,440 km (0.086 R)
• M5: 2,107,086 km (0.112 R)
• M6: 2,691,415 km (0.077 R)
• M7: 3,969,729 km (0.056 R)
• M8: 4,879,434 km (0.11 R)
• M9: 5,592,716 km (0.075 R)
• M10: 6,027,597 km (0.038 R)
• M11: 6,462,478 km (0.12 R)
• M12: 7,817,686 km (0.069 R)
• M13: 9,324,585 km (0.091 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.68 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 17.7

Radius: 12.7

Gravity: 0.11 G

Time & Orbit

Eccentricity (e): 0.052

Orbit Range: 1.59 AU - 1.77 AU

Year: 1406 Days

Day: 12.3 Hours

Environment

Temp: -191 °C

Axial Tilt: 46.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 54,966,219 km

• M1: 157,975 km (0.073 R)
• M2: 574,456 km (0.064 R)
• M3: 1,063,491 km (0.061 R)
• M4: 1,500,766 km (0.096 R)
• M5: 2,060,112 km (0.108 R)
• M6: 2,478,388 km (0.104 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 263.4

Radius: 9.7

Gravity: 2.8 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 2.16 AU - 3.34 AU

Year: 2945 Days

Day: 14.4 Hours

Environment

Temp: -193 °C

Axial Tilt: 44.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 54,966,219 km

• M1: 120,725 km (0.074 R)
• M2: 438,920 km (0.088 R)
• M3: 1,071,121 km (0.036 R)
• M4: 1,620,295 km (0.109 R)
• M5: 2,139,100 km (0.098 R)
• M6: 2,940,346 km (0.115 R)
• M7: 3,328,702 km (0.101 R)
• M8: 3,751,017 km (0.075 R)
• M9: 4,266,232 km (0.082 R)
• M10: 5,575,812 km (0.106 R)
• M11: 5,953,546 km (0.073 R)
• M12: 7,163,195 km (0.081 R)
• M13: 7,724,785 km (0.086 R)
• M14: 8,904,364 km (0.096 R)
• M15: 10,200,032 km (0.111 R)
• M16: 12,117,577 km (0.093 R)
• M17: 13,327,076 km (0.097 R)
• M18: 13,875,502 km (0.036 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 489.2

Radius: 13

Gravity: 2.89 G

Time & Orbit

Eccentricity (e): 0.115

Orbit Range: 2.73 AU - 3.45 AU

Year: 3507 Days

Day: 8.1 Hours

Environment

Temp: -212 °C

Axial Tilt: 11.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 54,966,219 km

• M1: 161,715 km (0.097 R)
• M2: 635,941 km (0.107 R)
• M3: 1,181,524 km (0.097 R)
• M4: 2,012,540 km (0.1 R)
• M5: 2,649,528 km (0.112 R)
• M6: 3,327,655 km (0.117 R)
• M7: 3,737,703 km (0.093 R)
• M8: 4,330,260 km (0.096 R)
• M9: 7,199,248 km (0.112 R)
• M10: 8,286,824 km (0.118 R)
• M11: 10,351,724 km (0.1 R)
• M12: 10,826,847 km (0.066 R)
• M13: 11,820,775 km (0.108 R)
• M14: 12,965,498 km (0.096 R)
• M15: 13,658,585 km (0.119 R)
• M16: 15,577,028 km (0.053 R)
• M17: 18,348,927 km (0.074 R)
• M18: 19,046,203 km (0.074 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 219

Radius: 8

Gravity: 3.42 G

Time & Orbit

Eccentricity (e): 0.01

Orbit Range: 10.32 AU - 10.52 AU

Year: 21718 Days

Day: 15.7 Hours

Environment

Temp: -227 °C

Axial Tilt: 26.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 54,966,219 km

• M1: 99,483 km (0.055 R)
• M2: 383,569 km (0.097 R)
• M3: 1,253,032 km (0.099 R)
• M4: 1,718,281 km (0.112 R)
• M5: 2,107,236 km (0.103 R)
• M6: 2,659,401 km (0.036 R)
• M7: 6,016,826 km (0.116 R)
• M8: 6,835,127 km (0.082 R)
• M9: 8,501,198 km (0.117 R)
• M10: 11,832,593 km (0.118 R)
• M11: 12,986,890 km (0.077 R)
• M12: 18,518,421 km (0.088 R)
• M13: 21,008,029 km (0.073 R)
• M14: 25,148,000 km (0.118 R)
• M15: 26,337,453 km (0.104 R)
• M16: 33,557,196 km (0.09 R)
• M17: 40,364,647 km (0.067 R)
• M18: 41,718,657 km (0.077 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 303 - 10,578 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit