🌌 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: 0.43

Radius: 0.71

Gravity: 0.85 G

Time & Orbit

Eccentricity (e): 0.026

Orbit Range: 0.56 AU - 0.58 AU

Year: 282 Days

Day: 19.9 Hours

Environment

Temp: -120 °C

Axial Tilt: 31.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 356.2

Radius: 10.8

Gravity: 3.05 G

Time & Orbit

Eccentricity (e): 0.174

Orbit Range: 0.59 AU - 0.85 AU

Year: 401 Days

Day: 5.9 Hours

Environment

Temp: -143 °C

Axial Tilt: 0.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 89,149,916 km

• M1: 142,866 km (0.093 R)
• M2: 494,870 km (0.069 R)
• M3: 870,959 km (0.1 R)
• M4: 1,517,521 km (0.107 R)
• M5: 1,909,168 km (0.118 R)
• M6: 2,513,992 km (0.052 R)
• M7: 3,391,533 km (0.054 R)
• M8: 4,009,223 km (0.107 R)
• M9: 4,514,116 km (0.1 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 789.8

Radius: 10.9

Gravity: 6.65 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 0.75 AU - 1.23 AU

Year: 646 Days

Day: 8.9 Hours

Environment

Temp: -160 °C

Axial Tilt: 38 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 89,149,916 km

• M1: 135,685 km (0.076 R)
• M2: 535,411 km (0.101 R)
• M3: 875,297 km (0.11 R)
• M4: 1,235,230 km (0.098 R)
• M5: 1,601,595 km (0.12 R)
• M6: 1,959,732 km (0.112 R)
• M7: 3,044,466 km (0.107 R)
• M8: 3,466,183 km (0.059 R)
• M9: 4,349,259 km (0.113 R)
• M10: 5,162,174 km (0.066 R)
• M11: 6,393,364 km (0.114 R)
• M12: 6,937,152 km (0.09 R)
• M13: 7,376,372 km (0.098 R)
• M14: 7,810,654 km (0.115 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 128.6

Radius: 13.7

Gravity: 0.69 G

Time & Orbit

Eccentricity (e): 0.033

Orbit Range: 1.11 AU - 1.19 AU

Year: 809 Days

Day: 7.8 Hours

Environment

Temp: -165 °C

Axial Tilt: 46.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 89,149,916 km

• M1: 175,030 km (0.076 R)
• M2: 926,160 km (0.106 R)
• M3: 1,477,728 km (0.025 R)
• M4: 2,779,080 km (0.104 R)
• M5: 4,175,725 km (0.049 R)
• M6: 4,913,991 km (0.104 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 318.6

Radius: 12.2

Gravity: 2.14 G

Time & Orbit

Eccentricity (e): 0.021

Orbit Range: 1.63 AU - 1.69 AU

Year: 1403 Days

Day: 6.6 Hours

Environment

Temp: -187 °C

Axial Tilt: 22.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 89,149,916 km

• M1: 151,692 km (0.076 R)
• M2: 597,344 km (0.114 R)
• M3: 1,119,291 km (0.079 R)
• M4: 1,500,616 km (0.115 R)
• M5: 2,009,698 km (0.089 R)
• M6: 2,551,242 km (0.119 R)
• M7: 3,410,233 km (0.086 R)
• M8: 3,915,275 km (0.055 R)
• M9: 4,402,067 km (0.094 R)
• M10: 5,002,403 km (0.094 R)
• M11: 5,537,515 km (0.075 R)
• M12: 6,026,101 km (0.086 R)
• M13: 6,790,547 km (0.101 R)
• M14: 7,375,325 km (0.101 R)
• M15: 8,302,233 km (0.088 R)
• M16: 9,305,287 km (0.075 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 800.8

Radius: 13.2

Gravity: 4.6 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 3.38 AU - 4.88 AU

Year: 5506 Days

Day: 9.6 Hours

Environment

Temp: -217 °C

Axial Tilt: 22.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (28)

Outer Limit: 89,149,916 km

• M1: 164,258 km (0.087 R)
• M2: 580,290 km (0.077 R)
• M3: 1,013,226 km (0.107 R)
• M4: 1,433,297 km (0.1 R)
• M5: 2,105,590 km (0.114 R)
• M6: 2,559,470 km (0.097 R)
• M7: 3,020,082 km (0.085 R)
• M8: 5,133,152 km (0.1 R)
• M9: 6,448,566 km (0.101 R)
• M10: 7,132,378 km (0.1 R)
• M11: 7,751,114 km (0.105 R)
• M12: 8,930,544 km (0.085 R)
• M13: 10,091,274 km (0.087 R)
• M14: 11,792,351 km (0.072 R)
• M15: 13,350,114 km (0.066 R)
• M16: 14,634,412 km (0.075 R)
• M17: 15,455,405 km (0.102 R)
• M18: 17,253,870 km (0.116 R)
• M19: 17,905,220 km (0.12 R)
• M20: 21,710,391 km (0.057 R)
• M21: 22,393,156 km (0.038 R)
• M22: 23,011,892 km (0.114 R)
• M23: 23,961,689 km (0.099 R)
• M24: 25,019,795 km (0.111 R)
• M25: 26,364,530 km (0.102 R)
• M26: 28,471,317 km (0.047 R)
• M27: 33,117,229 km (0.098 R)
• M28: 33,819,740 km (0.114 R)

Planet 7 - Ice Giant

Semi-Major Axis: 10.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 877.1

Radius: 6.4

Gravity: 21.41 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 7.96 AU - 13.1 AU

Year: 22416 Days

Day: 19.9 Hours

Environment

Temp: -240 °C

Axial Tilt: 36.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 89,149,916 km

• M1: 79,586 km (0.109 R)
• M2: 392,395 km (0.086 R)
• M3: 680,970 km (0.099 R)
• M4: 2,631,726 km (0.073 R)
• M5: 3,458,254 km (0.072 R)
• M6: 6,399,797 km (0.088 R)
• M7: 7,014,046 km (0.099 R)
• M8: 7,310,549 km (0.075 R)
• M9: 8,250,323 km (0.067 R)
• M10: 8,525,134 km (0.098 R)
• M11: 11,550,751 km (0.116 R)
• M12: 20,496,404 km (0.11 R)
• M13: 25,570,764 km (0.077 R)
• M14: 35,015,027 km (0.106 R)
• M15: 37,806,673 km (0.099 R)
• M16: 39,179,383 km (0.108 R)
• M17: 45,002,929 km (0.112 R)
• M18: 48,474,946 km (0.076 R)
• M19: 58,329,107 km (0.111 R)
• M20: 69,437,647 km (0.073 R)
• M21: 78,637,318 km (0.092 R)
• M22: 87,556,193 km (0.057 R)

Kuiper Belt

Range: 30 - 56 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 263 - 17,609 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit