🌌 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: 3.96

Radius: 1.73

Gravity: 1.32 G

Time & Orbit

Eccentricity (e): 0.183

Orbit Range: 0.42 AU - 0.62 AU

Year: 242 Days

Day: 40.4 Hours

Environment

Temp: -126 °C

Axial Tilt: 46.1 °

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: 761.6

Radius: 14.6

Gravity: 3.57 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 0.6 AU - 0.84 AU

Year: 394 Days

Day: 13 Hours

Environment

Temp: -144 °C

Axial Tilt: 13.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 62,611,737 km

• M1: 181,612 km (0.103 R)
• M2: 652,995 km (0.042 R)
• M3: 1,308,682 km (0.073 R)
• M4: 1,812,977 km (0.103 R)
• M5: 2,541,967 km (0.071 R)
• M6: 3,132,131 km (0.09 R)
• M7: 3,889,245 km (0.109 R)
• M8: 4,974,578 km (0.099 R)
• M9: 5,720,922 km (0.051 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.88 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 163.3

Radius: 13.8

Gravity: 0.86 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 0.73 AU - 1.03 AU

Year: 533 Days

Day: 7.4 Hours

Environment

Temp: -160 °C

Axial Tilt: 33.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 62,611,737 km

• M1: 171,589 km (0.092 R)
• M2: 609,911 km (0.098 R)
• M3: 1,166,863 km (0.095 R)
• M4: 1,598,603 km (0.077 R)
• M5: 2,162,437 km (0.045 R)
• M6: 3,367,298 km (0.096 R)
• M7: 3,971,973 km (0.111 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 656.8

Radius: 8.2

Gravity: 9.77 G

Time & Orbit

Eccentricity (e): 0.115

Orbit Range: 0.89 AU - 1.13 AU

Year: 655 Days

Day: 14.5 Hours

Environment

Temp: -162 °C

Axial Tilt: 28.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 62,611,737 km

• M1: 102,026 km (0.078 R)
• M2: 476,768 km (0.098 R)
• M3: 752,178 km (0.113 R)
• M4: 1,021,454 km (0.066 R)
• M5: 1,377,198 km (0.093 R)
• M6: 2,351,679 km (0.047 R)
• M7: 3,027,113 km (0.094 R)
• M8: 3,522,731 km (0.066 R)
• M9: 4,071,605 km (0.051 R)
• M10: 5,163,520 km (0.117 R)
• M11: 7,525,222 km (0.034 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 254.3

Radius: 12.5

Gravity: 1.63 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 1.17 AU - 1.23 AU

Year: 849 Days

Day: 12.3 Hours

Environment

Temp: -160 °C

Axial Tilt: 4.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 62,611,737 km

• M1: 155,881 km (0.108 R)
• M2: 728,093 km (0.078 R)
• M3: 1,218,923 km (0.078 R)
• M4: 1,719,179 km (0.086 R)
• M5: 2,127,282 km (0.113 R)
• M6: 2,652,221 km (0.047 R)
• M7: 3,098,920 km (0.053 R)
• M8: 4,845,176 km (0.083 R)
• M9: 5,604,385 km (0.061 R)
• M10: 6,365,389 km (0.075 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.44 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 584.2

Radius: 13.6

Gravity: 3.16 G

Time & Orbit

Eccentricity (e): 0.012

Orbit Range: 1.42 AU - 1.46 AU

Year: 1116 Days

Day: 6 Hours

Environment

Temp: -178 °C

Axial Tilt: 14.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 62,611,737 km

• M1: 169,195 km (0.098 R)
• M2: 609,761 km (0.115 R)
• M3: 1,344,436 km (0.055 R)
• M4: 2,119,203 km (0.088 R)
• M5: 2,615,719 km (0.107 R)
• M6: 3,231,314 km (0.111 R)
• M7: 3,739,797 km (0.087 R)
• M8: 4,234,817 km (0.083 R)
• M9: 5,397,192 km (0.082 R)
• M10: 5,926,469 km (0.117 R)
• M11: 9,000,406 km (0.114 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.16 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 407.7

Radius: 14

Gravity: 2.08 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 1.92 AU - 2.4 AU

Year: 2050 Days

Day: 13.6 Hours

Environment

Temp: -182 °C

Axial Tilt: 46.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 62,611,737 km

• M1: 174,431 km (0.093 R)
• M2: 1,033,721 km (0.109 R)
• M3: 1,832,724 km (0.102 R)
• M4: 2,378,157 km (0.076 R)
• M5: 3,394,076 km (0.071 R)
• M6: 3,993,216 km (0.104 R)
• M7: 4,942,564 km (0.116 R)
• M8: 6,322,904 km (0.072 R)
• M9: 6,819,269 km (0.095 R)
• M10: 8,117,779 km (0.07 R)
• M11: 10,502,668 km (0.11 R)
• M12: 11,452,764 km (0.117 R)
• M13: 12,080,028 km (0.118 R)
• M14: 13,851,267 km (0.039 R)

Planet 8 - Ice Giant

Semi-Major Axis: 11.3 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 253.8

Radius: 3.9

Gravity: 16.69 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 10.5 AU - 12.1 AU

Year: 24526 Days

Day: 19.7 Hours

Environment

Temp: -222 °C

Axial Tilt: 8.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 62,611,737 km

• M1: 64,177 km (0.06 R)
• M2: 407,355 km (0.107 R)
• M3: 902,674 km (0.102 R)
• M4: 1,512,135 km (0.094 R)
• M5: 1,687,464 km (0.097 R)
• M6: 2,117,857 km (0.086 R)
• M7: 2,753,947 km (0.079 R)
• M8: 3,141,106 km (0.119 R)
• M9: 4,423,759 km (0.087 R)
• M10: 6,420,441 km (0.105 R)
• M11: 9,628,867 km (0.101 R)
• M12: 12,509,673 km (0.106 R)
• M13: 19,981,937 km (0.077 R)
• M14: 20,422,952 km (0.102 R)
• M15: 23,988,767 km (0.092 R)
• M16: 28,388,739 km (0.095 R)
• M17: 32,080,815 km (0.114 R)
• M18: 32,563,717 km (0.096 R)
• M19: 41,817,392 km (0.114 R)
• M20: 43,709,207 km (0.047 R)
• M21: 46,575,352 km (0.12 R)
• M22: 58,393,434 km (0.096 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 207 - 16,271 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit