🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.82

Radius: 1.88

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.134

Orbit Range: 0.52 AU - 0.68 AU

Year: 300 Days

Day: 44.2 Hours

Environment

Temp: -131 °C

Axial Tilt: 15.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 448.2

Radius: 13.8

Gravity: 2.35 G

Time & Orbit

Eccentricity (e): 0.217

Orbit Range: 0.7 AU - 1.1 AU

Year: 551 Days

Day: 12.5 Hours

Environment

Temp: -158 °C

Axial Tilt: 13.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 20,094,832 km

• M1: 171,589 km (0.116 R)
• M2: 831,465 km (0.097 R)
• M3: 1,587,682 km (0.054 R)
• M4: 2,312,185 km (0.078 R)
• M5: 3,181,199 km (0.08 R)
• M6: 3,844,665 km (0.04 R)
• M7: 4,454,875 km (0.086 R)
• M8: 5,272,128 km (0.089 R)
• M9: 5,750,991 km (0.063 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 169.3

Radius: 9.5

Gravity: 1.88 G

Time & Orbit

Eccentricity (e): 0.042

Orbit Range: 0.96 AU - 1.04 AU

Year: 646 Days

Day: 9.9 Hours

Environment

Temp: -159 °C

Axial Tilt: 145.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 20,094,832 km

• M1: 118,182 km (0.068 R)
• M2: 809,474 km (0.08 R)
• M3: 1,373,757 km (0.076 R)
• M4: 1,903,184 km (0.101 R)
• M5: 2,308,146 km (0.103 R)
• M6: 3,358,921 km (0.052 R)
• M7: 3,772,110 km (0.108 R)
• M8: 4,415,531 km (0.1 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 138

Radius: 12.3

Gravity: 0.91 G

Time & Orbit

Eccentricity (e): 0.187

Orbit Range: 1.71 AU - 2.49 AU

Year: 1965 Days

Day: 11.4 Hours

Environment

Temp: -188 °C

Axial Tilt: 23.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 20,094,832 km

• M1: 153,039 km (0.048 R)
• M2: 543,339 km (0.103 R)
• M3: 993,180 km (0.102 R)
• M4: 1,466,807 km (0.067 R)
• M5: 1,883,437 km (0.12 R)
• M6: 2,591,035 km (0.113 R)
• M7: 3,728,577 km (0.088 R)
• M8: 4,142,515 km (0.047 R)
• M9: 5,267,491 km (0.102 R)
• M10: 6,391,419 km (0.11 R)
• M11: 7,839,976 km (0.12 R)
• M12: 9,055,758 km (0.083 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.17 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 708.7

Radius: 13.9

Gravity: 3.67 G

Time & Orbit

Eccentricity (e): 0.02

Orbit Range: 2.13 AU - 2.21 AU

Year: 2064 Days

Day: 10.6 Hours

Environment

Temp: -190 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 20,094,832 km

• M1: 173,085 km (0.098 R)
• M2: 639,082 km (0.066 R)
• M3: 1,237,324 km (0.09 R)
• M4: 2,217,788 km (0.099 R)
• M5: 2,653,717 km (0.106 R)
• M6: 3,163,546 km (0.114 R)
• M7: 3,902,410 km (0.065 R)
• M8: 5,847,482 km (0.075 R)
• M9: 6,350,130 km (0.115 R)
• M10: 6,881,652 km (0.101 R)
• M11: 7,385,198 km (0.099 R)
• M12: 8,753,271 km (0.097 R)
• M13: 10,832,232 km (0.026 R)
• M14: 12,187,439 km (0.088 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 297.7

Radius: 13

Gravity: 1.76 G

Time & Orbit

Eccentricity (e): 0.037

Orbit Range: 2.86 AU - 3.08 AU

Year: 3305 Days

Day: 8.6 Hours

Environment

Temp: -195 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 20,094,832 km

• M1: 162,613 km (0.076 R)
• M2: 635,193 km (0.083 R)
• M3: 1,082,939 km (0.083 R)
• M4: 1,749,397 km (0.08 R)
• M5: 2,839,068 km (0.113 R)
• M6: 3,362,511 km (0.108 R)
• M7: 4,605,819 km (0.087 R)
• M8: 5,615,754 km (0.075 R)
• M9: 10,908,078 km (0.12 R)
• M10: 11,522,776 km (0.09 R)
• M11: 12,079,430 km (0.088 R)
• M12: 13,769,586 km (0.074 R)
• M13: 14,351,373 km (0.111 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 531.8

Radius: 12.6

Gravity: 3.35 G

Time & Orbit

Eccentricity (e): 0.222

Orbit Range: 2.98 AU - 4.68 AU

Year: 4840 Days

Day: 6.4 Hours

Environment

Temp: -217 °C

Axial Tilt: 5.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 20,094,832 km

• M1: 156,629 km (0.102 R)
• M2: 937,829 km (0.114 R)
• M3: 2,394,464 km (0.072 R)
• M4: 4,898,133 km (0.092 R)
• M5: 7,918,814 km (0.067 R)
• M6: 8,758,955 km (0.086 R)
• M7: 11,638,266 km (0.12 R)
• M8: 12,055,494 km (0.117 R)
• M9: 15,594,381 km (0.081 R)
• M10: 18,618,652 km (0.111 R)
• M11: 21,180,515 km (0.093 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.59 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 19.1

Radius: 3.2

Gravity: 1.87 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 8.29 AU - 8.89 AU

Year: 16256 Days

Day: 22.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 31.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 20,094,832 km

• M1: 45,029 km (0.08 R)
• M2: 147,204 km (0.099 R)
• M3: 268,229 km (0.109 R)
• M4: 603,179 km (0.049 R)
• M5: 747,541 km (0.042 R)
• M6: 1,257,071 km (0.038 R)
• M7: 2,779,080 km (0.067 R)
• M8: 3,468,277 km (0.064 R)
• M9: 4,350,007 km (0.081 R)
• M10: 7,432,172 km (0.118 R)
• M11: 8,948,197 km (0.057 R)
• M12: 13,660,230 km (0.1 R)
• M13: 14,954,252 km (0.096 R)
• M14: 18,857,709 km (0.093 R)

Kuiper Belt

Range: 30 - 46 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 270 - 10,974 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit