🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.34 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.18

Radius: 1.37

Gravity: 1.16 G

Time & Orbit

Eccentricity (e): 0.167

Orbit Range: 0.56 AU - 0.78 AU

Year: 360 Days

Day: 21 Hours

Environment

Temp: -144 °C

Axial Tilt: 29.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 1.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 905

Radius: 12.3

Gravity: 5.98 G

Time & Orbit

Eccentricity (e): 0.204

Orbit Range: 0.92 AU - 1.38 AU

Year: 809 Days

Day: 13.9 Hours

Environment

Temp: -163 °C

Axial Tilt: 12.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 56,316,845 km

• M1: 162,912 km (0.045 R)
• M2: 571,763 km (0.1 R)
• M3: 966,851 km (0.073 R)
• M4: 1,636,152 km (0.092 R)
• M5: 2,072,230 km (0.118 R)
• M6: 2,680,046 km (0.106 R)
• M7: 3,708,082 km (0.093 R)
• M8: 4,190,236 km (0.111 R)
• M9: 4,784,589 km (0.096 R)
• M10: 6,227,909 km (0.076 R)
• M11: 7,548,260 km (0.094 R)
• M12: 8,722,005 km (0.08 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 993.3

Radius: 14.9

Gravity: 4.47 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 1.41 AU - 1.87 AU

Year: 1378 Days

Day: 6.7 Hours

Environment

Temp: -182 °C

Axial Tilt: 0.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 56,316,845 km

• M1: 185,352 km (0.053 R)
• M2: 680,371 km (0.064 R)
• M3: 1,162,824 km (0.12 R)
• M4: 1,697,188 km (0.114 R)
• M5: 2,252,645 km (0.107 R)
• M6: 2,817,377 km (0.115 R)
• M7: 3,860,822 km (0.072 R)
• M8: 4,367,959 km (0.116 R)
• M9: 4,940,320 km (0.061 R)
• M10: 5,429,655 km (0.115 R)
• M11: 6,506,759 km (0.061 R)
• M12: 7,149,581 km (0.036 R)
• M13: 8,325,122 km (0.088 R)
• M14: 9,658,637 km (0.074 R)
• M15: 10,705,224 km (0.055 R)
• M16: 11,788,911 km (0.054 R)
• M17: 12,629,351 km (0.077 R)
• M18: 14,174,697 km (0.082 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 226

Radius: 12

Gravity: 1.57 G

Time & Orbit

Eccentricity (e): 0.154

Orbit Range: 1.49 AU - 2.03 AU

Year: 1532 Days

Day: 12.1 Hours

Environment

Temp: -185 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 56,316,845 km

• M1: 149,299 km (0.12 R)
• M2: 742,005 km (0.064 R)
• M3: 1,233,883 km (0.078 R)
• M4: 1,868,477 km (0.081 R)
• M5: 2,384,291 km (0.111 R)
• M6: 2,869,138 km (0.115 R)
• M7: 3,618,174 km (0.087 R)
• M8: 4,393,241 km (0.12 R)
• M9: 4,768,133 km (0.08 R)
• M10: 7,020,927 km (0.086 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.36 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 358.8

Radius: 13.2

Gravity: 2.06 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 1.97 AU - 2.75 AU

Year: 2378 Days

Day: 5.7 Hours

Environment

Temp: -193 °C

Axial Tilt: 29.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 56,316,845 km

• M1: 164,258 km (0.097 R)
• M2: 584,479 km (0.104 R)
• M3: 1,545,795 km (0.11 R)
• M4: 2,179,342 km (0.095 R)
• M5: 3,380,164 km (0.114 R)
• M6: 3,814,447 km (0.086 R)
• M7: 4,438,868 km (0.073 R)
• M8: 6,229,255 km (0.12 R)
• M9: 7,534,198 km (0.096 R)
• M10: 9,267,887 km (0.072 R)
• M11: 9,990,595 km (0.088 R)
• M12: 11,327,252 km (0.105 R)

Planet 6 - Ice Giant

Semi-Major Axis: 5.95 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 232.1

Radius: 6.2

Gravity: 6.04 G

Time & Orbit

Eccentricity (e): 0.092

Orbit Range: 5.4 AU - 6.5 AU

Year: 9521 Days

Day: 21.1 Hours

Environment

Temp: -211 °C

Axial Tilt: 49.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 56,316,845 km

• M1: 77,193 km (0.081 R)
• M2: 528,679 km (0.077 R)
• M3: 800,648 km (0.089 R)
• M4: 1,236,576 km (0.076 R)
• M5: 1,764,956 km (0.083 R)
• M6: 2,806,755 km (0.111 R)
• M7: 4,207,590 km (0.081 R)
• M8: 4,509,777 km (0.076 R)
• M9: 4,880,481 km (0.083 R)
• M10: 5,157,536 km (0.067 R)
• M11: 5,834,616 km (0.038 R)
• M12: 8,221,600 km (0.077 R)
• M13: 11,722,489 km (0.1 R)
• M14: 12,679,916 km (0.093 R)
• M15: 13,098,191 km (0.028 R)
• M16: 17,096,643 km (0.047 R)
• M17: 17,414,539 km (0.091 R)
• M18: 18,127,971 km (0.074 R)
• M19: 19,543,466 km (0.097 R)
• M20: 20,598,729 km (0.111 R)
• M21: 25,364,768 km (0.11 R)
• M22: 29,341,528 km (0.101 R)
• M23: 31,287,796 km (0.059 R)

Planet 7 - Ice Giant

Semi-Major Axis: 7.89 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 525.6

Radius: 3.7

Gravity: 38.39 G

Time & Orbit

Eccentricity (e): 0.219

Orbit Range: 6.16 AU - 9.62 AU

Year: 14539 Days

Day: 16.7 Hours

Environment

Temp: -218 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 56,316,845 km

• M1: 51,162 km (0.115 R)
• M2: 347,516 km (0.05 R)
• M3: 530,773 km (0.067 R)
• M4: 678,426 km (0.077 R)
• M5: 1,565,392 km (0.038 R)
• M6: 1,872,666 km (0.103 R)
• M7: 2,296,926 km (0.113 R)
• M8: 2,896,364 km (0.093 R)
• M9: 4,519,950 km (0.089 R)
• M10: 6,666,231 km (0.087 R)
• M11: 6,788,602 km (0.044 R)
• M12: 7,554,393 km (0.077 R)
• M13: 9,205,355 km (0.12 R)
• M14: 9,717,878 km (0.091 R)
• M15: 13,521,852 km (0.091 R)
• M16: 21,578,446 km (0.063 R)
• M17: 24,845,214 km (0.056 R)
• M18: 30,845,435 km (0.056 R)
• M19: 32,337,375 km (0.047 R)
• M20: 40,522,922 km (0.114 R)
• M21: 42,310,467 km (0.115 R)
• M22: 45,307,810 km (0.09 R)

Kuiper Belt

Range: 30 - 49 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 390 - 19,957 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit