🌌 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: 1.25

Radius: 1.09

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.243

Orbit Range: 0.39 AU - 0.65 AU

Year: 238 Days

Day: 47.3 Hours

Environment

Temp: -118 °C

Axial Tilt: 21 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 749.3

Radius: 8.1

Gravity: 11.42 G

Time & Orbit

Eccentricity (e): 0.133

Orbit Range: 0.69 AU - 0.91 AU

Year: 455 Days

Day: 14.8 Hours

Environment

Temp: -156 °C

Axial Tilt: 32.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 73,350,571 km

• M1: 101,577 km (0.12 R)
• M2: 515,215 km (0.101 R)
• M3: 807,230 km (0.106 R)
• M4: 1,103,284 km (0.082 R)
• M5: 1,425,219 km (0.1 R)
• M6: 2,355,119 km (0.105 R)
• M7: 3,478,150 km (0.025 R)
• M8: 4,970,838 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.66 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 252.4

Radius: 11.2

Gravity: 2.01 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 1.43 AU - 1.89 AU

Year: 1360 Days

Day: 12.4 Hours

Environment

Temp: -179 °C

Axial Tilt: 33.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 73,350,571 km

• M1: 139,575 km (0.094 R)
• M2: 724,951 km (0.061 R)
• M3: 1,347,278 km (0.083 R)
• M4: 1,930,710 km (0.109 R)
• M5: 2,419,596 km (0.103 R)
• M6: 3,288,012 km (0.101 R)
• M7: 3,750,568 km (0.082 R)
• M8: 7,642,656 km (0.054 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.04 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 335.3

Radius: 12.9

Gravity: 2.01 G

Time & Orbit

Eccentricity (e): 0.244

Orbit Range: 1.54 AU - 2.54 AU

Year: 1853 Days

Day: 8.6 Hours

Environment

Temp: -195 °C

Axial Tilt: 33 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 73,350,571 km

• M1: 160,519 km (0.116 R)
• M2: 799,301 km (0.066 R)
• M3: 1,594,564 km (0.073 R)
• M4: 2,005,359 km (0.092 R)
• M5: 2,427,973 km (0.097 R)
• M6: 3,090,094 km (0.114 R)
• M7: 3,534,100 km (0.089 R)
• M8: 3,970,028 km (0.107 R)
• M9: 4,533,563 km (0.07 R)
• M10: 5,251,334 km (0.098 R)
• M11: 5,910,013 km (0.084 R)
• M12: 6,551,639 km (0.041 R)
• M13: 8,221,600 km (0.114 R)
• M14: 8,759,404 km (0.105 R)
• M15: 9,874,507 km (0.104 R)
• M16: 10,746,363 km (0.105 R)
• M17: 11,355,675 km (0.096 R)
• M18: 12,167,543 km (0.09 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 801

Radius: 13

Gravity: 4.74 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 2.68 AU - 2.98 AU

Year: 3027 Days

Day: 7.1 Hours

Environment

Temp: -208 °C

Axial Tilt: 33.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 73,350,571 km

• M1: 163,810 km (0.109 R)
• M2: 778,059 km (0.095 R)
• M3: 1,334,712 km (0.115 R)
• M4: 1,848,431 km (0.088 R)
• M5: 2,262,967 km (0.119 R)
• M6: 2,677,203 km (0.111 R)
• M7: 3,303,570 km (0.103 R)
• M8: 3,780,787 km (0.119 R)
• M9: 4,217,014 km (0.097 R)
• M10: 4,757,063 km (0.081 R)
• M11: 5,627,573 km (0.119 R)
• M12: 7,175,611 km (0.103 R)
• M13: 8,217,860 km (0.093 R)
• M14: 9,812,872 km (0.112 R)
• M15: 11,264,271 km (0.092 R)
• M16: 12,670,640 km (0.109 R)
• M17: 13,416,386 km (0.071 R)
• M18: 15,149,627 km (0.11 R)
• M19: 17,083,628 km (0.111 R)
• M20: 19,298,425 km (0.109 R)
• M21: 21,436,776 km (0.037 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 237.8

Radius: 10.8

Gravity: 2.04 G

Time & Orbit

Eccentricity (e): 0.079

Orbit Range: 3.77 AU - 4.41 AU

Year: 5259 Days

Day: 12.7 Hours

Environment

Temp: -216 °C

Axial Tilt: 145.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 73,350,571 km

• M1: 134,339 km (0.073 R)
• M2: 568,472 km (0.083 R)
• M3: 1,152,053 km (0.079 R)
• M4: 2,844,903 km (0.107 R)
• M5: 3,493,559 km (0.091 R)
• M6: 4,752,724 km (0.111 R)
• M7: 6,578,566 km (0.083 R)
• M8: 8,378,827 km (0.106 R)
• M9: 10,526,454 km (0.104 R)
• M10: 13,156,684 km (0.12 R)
• M11: 18,137,994 km (0.05 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.66 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 551.1

Radius: 4.5

Gravity: 27.21 G

Time & Orbit

Eccentricity (e): 0.06

Orbit Range: 6.26 AU - 7.06 AU

Year: 10928 Days

Day: 15.1 Hours

Environment

Temp: -216 °C

Axial Tilt: 20 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (30)

Outer Limit: 73,350,571 km

• M1: 56,398 km (0.093 R)
• M2: 212,279 km (0.107 R)
• M3: 518,955 km (0.117 R)
• M4: 955,182 km (0.119 R)
• M5: 1,138,141 km (0.103 R)
• M6: 1,560,904 km (0.091 R)
• M7: 1,896,452 km (0.105 R)
• M8: 2,081,505 km (0.12 R)
• M9: 3,102,211 km (0.052 R)
• M10: 3,581,074 km (0.058 R)
• M11: 3,838,233 km (0.108 R)
• M12: 4,564,979 km (0.045 R)
• M13: 5,961,176 km (0.081 R)
• M14: 6,660,396 km (0.096 R)
• M15: 7,290,203 km (0.058 R)
• M16: 7,453,564 km (0.05 R)
• M17: 11,424,341 km (0.095 R)
• M18: 13,823,890 km (0.105 R)
• M19: 14,910,420 km (0.051 R)
• M20: 15,643,001 km (0.086 R)
• M21: 16,680,312 km (0.116 R)
• M22: 27,658,402 km (0.098 R)
• M23: 29,273,760 km (0.077 R)
• M24: 33,698,117 km (0.111 R)
• M25: 35,188,860 km (0.086 R)
• M26: 37,445,843 km (0.102 R)
• M27: 39,545,449 km (0.089 R)
• M28: 42,114,493 km (0.08 R)
• M29: 46,733,328 km (0.084 R)
• M30: 47,015,170 km (0.088 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.37 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 544.5

Radius: 3.8

Gravity: 37.71 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 8.5 AU - 12.24 AU

Year: 21233 Days

Day: 19.7 Hours

Environment

Temp: -228 °C

Axial Tilt: 34.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 73,350,571 km

• M1: 47,273 km (0.045 R)
• M2: 299,645 km (0.067 R)
• M3: 765,642 km (0.089 R)
• M4: 1,335,610 km (0.078 R)
• M5: 1,555,219 km (0.1 R)
• M6: 1,726,359 km (0.04 R)
• M7: 2,046,349 km (0.108 R)
• M8: 2,231,103 km (0.102 R)
• M9: 2,563,659 km (0.09 R)
• M10: 4,296,002 km (0.112 R)
• M11: 4,738,662 km (0.085 R)
• M12: 6,682,537 km (0.112 R)
• M13: 7,417,511 km (0.104 R)
• M14: 7,706,534 km (0.1 R)
• M15: 7,853,739 km (0.065 R)
• M16: 8,053,153 km (0.099 R)
• M17: 8,724,249 km (0.08 R)
• M18: 14,202,223 km (0.113 R)
• M19: 15,025,760 km (0.116 R)
• M20: 15,255,841 km (0.076 R)
• M21: 16,199,505 km (0.035 R)
• M22: 18,463,968 km (0.072 R)
• M23: 18,994,292 km (0.071 R)
• M24: 20,552,055 km (0.098 R)
• M25: 21,701,714 km (0.086 R)
• M26: 33,382,466 km (0.071 R)
• M27: 34,168,752 km (0.087 R)
• M28: 35,506,755 km (0.089 R)
• M29: 44,589,740 km (0.054 R)
• M30: 47,985,611 km (0.106 R)
• M31: 51,203,013 km (0.074 R)
• M32: 52,423,731 km (0.056 R)
• M33: 58,063,422 km (0.074 R)
• M34: 59,390,504 km (0.059 R)
• M35: 64,496,878 km (0.116 R)
• M36: 66,949,236 km (0.084 R)
• M37: 67,571,862 km (0.083 R)
• M38: 73,130,919 km (0.097 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: 516 - 19,990 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit