🌌 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: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.91

Radius: 1.89

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 0.51 AU - 0.65 AU

Year: 290 Days

Day: 13.2 Hours

Environment

Temp: -133 °C

Axial Tilt: 46.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.95 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 494.2

Radius: 10.8

Gravity: 4.24 G

Time & Orbit

Eccentricity (e): 0.095

Orbit Range: 0.86 AU - 1.04 AU

Year: 607 Days

Day: 5.6 Hours

Environment

Temp: -163 °C

Axial Tilt: 46.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 48,599,962 km

• M1: 134,339 km (0.074 R)
• M2: 485,894 km (0.079 R)
• M3: 952,789 km (0.106 R)
• M4: 1,308,233 km (0.076 R)
• M5: 1,655,749 km (0.061 R)
• M6: 2,005,509 km (0.096 R)
• M7: 3,517,046 km (0.09 R)
• M8: 3,855,885 km (0.115 R)
• M9: 4,753,772 km (0.055 R)
• M10: 5,557,561 km (0.079 R)
• M11: 5,965,065 km (0.098 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.06 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 233.1

Radius: 10.8

Gravity: 2 G

Time & Orbit

Eccentricity (e): 0.045

Orbit Range: 1.01 AU - 1.11 AU

Year: 716 Days

Day: 7.3 Hours

Environment

Temp: -167 °C

Axial Tilt: 94 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 48,599,962 km

• M1: 134,339 km (0.118 R)
• M2: 601,383 km (0.075 R)
• M3: 982,858 km (0.109 R)
• M4: 1,859,801 km (0.1 R)
• M5: 2,381,149 km (0.117 R)
• M6: 2,737,342 km (0.064 R)
• M7: 3,185,088 km (0.111 R)
• M8: 3,534,549 km (0.03 R)
• M9: 4,270,122 km (0.096 R)
• M10: 4,815,107 km (0.112 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 59.1

Radius: 8

Gravity: 0.92 G

Time & Orbit

Eccentricity (e): 0.044

Orbit Range: 1.39 AU - 1.51 AU

Year: 1145 Days

Day: 13.9 Hours

Environment

Temp: -181 °C

Axial Tilt: 37.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (4)

Outer Limit: 48,599,962 km

• M1: 124,017 km (0.115 R)
• M2: 824,284 km (0.081 R)
• M3: 1,750,145 km (0.115 R)
• M4: 2,682,140 km (0.08 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.65 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 135.6

Radius: 13.4

Gravity: 0.76 G

Time & Orbit

Eccentricity (e): 0.001

Orbit Range: 1.65 AU - 1.65 AU

Year: 1390 Days

Day: 5.8 Hours

Environment

Temp: -189 °C

Axial Tilt: 19.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 48,599,962 km

• M1: 166,652 km (0.094 R)
• M2: 927,806 km (0.05 R)
• M3: 1,524,253 km (0.082 R)
• M4: 2,052,632 km (0.045 R)
• M5: 2,702,785 km (0.06 R)
• M6: 3,137,217 km (0.1 R)
• M7: 3,822,375 km (0.118 R)
• M8: 4,313,056 km (0.107 R)
• M9: 4,780,849 km (0.091 R)
• M10: 7,087,498 km (0.086 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.86 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 788.4

Radius: 14.9

Gravity: 3.55 G

Time & Orbit

Eccentricity (e): 0.041

Orbit Range: 1.78 AU - 1.94 AU

Year: 1664 Days

Day: 10.5 Hours

Environment

Temp: -185 °C

Axial Tilt: 8.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 48,599,962 km

• M1: 185,501 km (0.058 R)
• M2: 700,567 km (0.058 R)
• M3: 1,321,548 km (0.071 R)
• M4: 1,984,117 km (0.107 R)
• M5: 2,710,265 km (0.07 R)
• M6: 3,237,298 km (0.033 R)
• M7: 3,763,134 km (0.092 R)
• M8: 4,403,862 km (0.034 R)
• M9: 6,121,844 km (0.106 R)
• M10: 6,932,665 km (0.078 R)
• M11: 8,104,465 km (0.032 R)
• M12: 10,139,145 km (0.089 R)
• M13: 10,839,862 km (0.085 R)
• M14: 11,723,237 km (0.114 R)
• M15: 13,137,835 km (0.03 R)
• M16: 14,619,602 km (0.111 R)

Planet 7 - Gas Giant

Semi-Major Axis: 5.61 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 146.5

Radius: 12.1

Gravity: 1 G

Time & Orbit

Eccentricity (e): 0.097

Orbit Range: 5.07 AU - 6.15 AU

Year: 8717 Days

Day: 8.7 Hours

Environment

Temp: -225 °C

Axial Tilt: 5.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 48,599,962 km

• M1: 215,870 km (0.105 R)
• M2: 709,244 km (0.084 R)
• M3: 1,128,267 km (0.1 R)
• M4: 2,232,599 km (0.075 R)
• M5: 3,956,864 km (0.077 R)
• M6: 5,277,364 km (0.118 R)
• M7: 6,199,785 km (0.117 R)
• M8: 11,078,022 km (0.073 R)
• M9: 13,920,231 km (0.095 R)
• M10: 15,674,865 km (0.103 R)
• M11: 20,335,287 km (0.05 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.53 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 142.1

Radius: 7

Gravity: 2.9 G

Time & Orbit

Eccentricity (e): 0.188

Orbit Range: 8.55 AU - 12.51 AU

Year: 22416 Days

Day: 18.9 Hours

Environment

Temp: -236 °C

Axial Tilt: 39.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 48,599,962 km

• M1: 87,515 km (0.036 R)
• M2: 356,043 km (0.115 R)
• M3: 1,052,571 km (0.047 R)
• M4: 1,294,919 km (0.047 R)
• M5: 1,574,667 km (0.031 R)
• M6: 2,624,994 km (0.078 R)
• M7: 3,009,311 km (0.115 R)
• M8: 3,262,281 km (0.109 R)
• M9: 4,964,705 km (0.086 R)
• M10: 6,869,085 km (0.072 R)
• M11: 8,380,473 km (0.046 R)
• M12: 16,372,889 km (0.069 R)
• M13: 21,976,974 km (0.115 R)
• M14: 28,330,396 km (0.025 R)
• M15: 33,942,410 km (0.119 R)
• M16: 34,866,776 km (0.096 R)
• M17: 35,926,677 km (0.091 R)
• M18: 40,124,393 km (0.045 R)
• M19: 41,812,306 km (0.068 R)
• M20: 44,637,910 km (0.118 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 486 - 11,324 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit