🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.63 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.28

Radius: 1.1

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.114

Orbit Range: 0.56 AU - 0.7 AU

Year: 328 Days

Day: 12.6 Hours

Environment

Temp: -126 °C

Axial Tilt: 35.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 21,845,942 km

• M1: 508,334 km (0.093 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 387.3

Radius: 11.6

Gravity: 2.88 G

Time & Orbit

Eccentricity (e): 0.213

Orbit Range: 0.57 AU - 0.89 AU

Year: 409 Days

Day: 9.3 Hours

Environment

Temp: -138 °C

Axial Tilt: 39.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 21,845,942 km

• M1: 144,212 km (0.097 R)
• M2: 559,945 km (0.082 R)
• M3: 1,011,581 km (0.057 R)
• M4: 1,374,056 km (0.098 R)
• M5: 2,267,754 km (0.083 R)
• M6: 3,897,324 km (0.045 R)
• M7: 4,665,359 km (0.116 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 859.3

Radius: 13.8

Gravity: 4.51 G

Time & Orbit

Eccentricity (e): 0.11

Orbit Range: 0.66 AU - 0.82 AU

Year: 418 Days

Day: 9.2 Hours

Environment

Temp: -144 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 21,845,942 km

• M1: 171,589 km (0.086 R)
• M2: 645,964 km (0.109 R)
• M3: 1,304,045 km (0.092 R)
• M4: 2,439,492 km (0.099 R)
• M5: 3,010,059 km (0.064 R)
• M6: 3,809,360 km (0.106 R)
• M7: 5,609,023 km (0.073 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 279.7

Radius: 10.9

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 0.66 AU - 1 AU

Year: 496 Days

Day: 13.9 Hours

Environment

Temp: -157 °C

Axial Tilt: 20.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 21,845,942 km

• M1: 135,685 km (0.09 R)
• M2: 476,320 km (0.093 R)
• M3: 915,988 km (0.106 R)
• M4: 1,302,100 km (0.106 R)
• M5: 1,715,289 km (0.12 R)
• M6: 2,614,821 km (0.091 R)
• M7: 3,369,393 km (0.111 R)
• M8: 3,985,736 km (0.033 R)
• M9: 4,634,841 km (0.043 R)

Planet 5 - Gas Giant

Semi-Major Axis: 0.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 244.7

Radius: 11.1

Gravity: 1.99 G

Time & Orbit

Eccentricity (e): 0.115

Orbit Range: 0.78 AU - 0.98 AU

Year: 542 Days

Day: 9.4 Hours

Environment

Temp: -151 °C

Axial Tilt: 141.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 21,845,942 km

• M1: 138,079 km (0.096 R)
• M2: 498,610 km (0.075 R)
• M3: 870,510 km (0.111 R)
• M4: 1,360,742 km (0.042 R)
• M5: 2,023,910 km (0.118 R)
• M6: 2,487,962 km (0.067 R)
• M7: 2,842,659 km (0.115 R)
• M8: 3,620,867 km (0.062 R)
• M9: 4,041,835 km (0.1 R)
• M10: 4,388,753 km (0.065 R)
• M11: 4,839,940 km (0.116 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 296.8

Radius: 14.4

Gravity: 1.43 G

Time & Orbit

Eccentricity (e): 0.216

Orbit Range: 1.87 AU - 2.91 AU

Year: 2424 Days

Day: 10.6 Hours

Environment

Temp: -201 °C

Axial Tilt: 25.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 21,845,942 km

• M1: 179,069 km (0.078 R)
• M2: 955,033 km (0.08 R)
• M3: 1,671,008 km (0.073 R)
• M4: 3,627,000 km (0.083 R)
• M5: 5,353,509 km (0.11 R)
• M6: 6,099,255 km (0.115 R)
• M7: 7,280,031 km (0.093 R)
• M8: 7,996,006 km (0.099 R)
• M9: 8,941,465 km (0.079 R)
• M10: 10,125,981 km (0.093 R)
• M11: 11,125,743 km (0.109 R)
• M12: 12,418,867 km (0.105 R)
• M13: 13,241,506 km (0.083 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 866.5

Radius: 11.4

Gravity: 6.67 G

Time & Orbit

Eccentricity (e): 0.055

Orbit Range: 3.22 AU - 3.6 AU

Year: 4131 Days

Day: 7.8 Hours

Environment

Temp: -199 °C

Axial Tilt: 7.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 21,845,942 km

• M1: 141,968 km (0.034 R)
• M2: 616,194 km (0.061 R)
• M3: 985,850 km (0.044 R)
• M4: 1,400,236 km (0.08 R)
• M5: 1,839,007 km (0.066 R)
• M6: 2,562,462 km (0.113 R)
• M7: 4,474,173 km (0.063 R)
• M8: 5,524,500 km (0.028 R)
• M9: 6,668,026 km (0.105 R)
• M10: 7,126,992 km (0.113 R)
• M11: 7,962,945 km (0.101 R)
• M12: 9,581,893 km (0.101 R)
• M13: 11,090,139 km (0.116 R)
• M14: 14,248,300 km (0.055 R)
• M15: 15,178,798 km (0.076 R)
• M16: 16,918,921 km (0.051 R)
• M17: 18,403,829 km (0.078 R)
• M18: 19,507,114 km (0.047 R)
• M19: 21,988,045 km (0.086 R)
• M20: 22,933,653 km (0.076 R)
• M21: 23,304,356 km (0.098 R)
• M22: 24,750,070 km (0.077 R)
• M23: 25,693,434 km (0.079 R)
• M24: 27,484,869 km (0.081 R)

Planet 8 - Ice Giant

Semi-Major Axis: 7.58 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 34.6

Radius: 5.2

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.005

Orbit Range: 7.54 AU - 7.62 AU

Year: 13690 Days

Day: 21.4 Hours

Environment

Temp: -228 °C

Axial Tilt: 35.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 21,845,942 km

• M1: 65,075 km (0.064 R)
• M2: 306,227 km (0.098 R)
• M3: 618,138 km (0.097 R)
• M4: 1,022,801 km (0.07 R)
• M5: 1,241,064 km (0.093 R)
• M6: 2,706,525 km (0.119 R)
• M7: 5,356,950 km (0.106 R)
• M8: 6,073,973 km (0.074 R)
• M9: 8,503,143 km (0.115 R)
• M10: 10,722,278 km (0.05 R)
• M11: 11,682,995 km (0.079 R)
• M12: 12,384,310 km (0.083 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 500 - 15,154 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit