🌌 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: 0.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.55

Radius: 1.45

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 0.51 AU - 0.51 AU

Year: 239 Days

Day: 28.5 Hours

Environment

Temp: -120 °C

Axial Tilt: 33.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 48,307,202 km

• M1: 394,041 km (0.07 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 453.6

Radius: 12.2

Gravity: 3.05 G

Time & Orbit

Eccentricity (e): 0

Orbit Range: 0.71 AU - 0.71 AU

Year: 392 Days

Day: 14.7 Hours

Environment

Temp: -145 °C

Axial Tilt: 16 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 48,307,202 km

• M1: 151,692 km (0.059 R)
• M2: 566,378 km (0.075 R)
• M3: 999,015 km (0.112 R)
• M4: 1,435,092 km (0.106 R)
• M5: 1,874,312 km (0.102 R)
• M6: 2,276,880 km (0.038 R)
• M7: 2,672,267 km (0.073 R)
• M8: 3,260,934 km (0.115 R)
• M9: 3,910,638 km (0.044 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 193.1

Radius: 11.7

Gravity: 1.41 G

Time & Orbit

Eccentricity (e): 0.043

Orbit Range: 0.77 AU - 0.83 AU

Year: 469 Days

Day: 9.8 Hours

Environment

Temp: -137 °C

Axial Tilt: 145.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 48,307,202 km

• M1: 145,708 km (0.092 R)
• M2: 581,637 km (0.056 R)
• M3: 984,803 km (0.113 R)
• M4: 1,539,362 km (0.056 R)
• M5: 2,963,683 km (0.099 R)
• M6: 3,348,898 km (0.101 R)
• M7: 3,767,622 km (0.104 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 268.8

Radius: 13.4

Gravity: 1.5 G

Time & Orbit

Eccentricity (e): 0.072

Orbit Range: 0.85 AU - 0.99 AU

Year: 579 Days

Day: 6.8 Hours

Environment

Temp: -144 °C

Axial Tilt: 33.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 48,307,202 km

• M1: 170,542 km (0.049 R)
• M2: 608,714 km (0.104 R)
• M3: 1,133,353 km (0.083 R)
• M4: 1,925,773 km (0.066 R)
• M5: 2,607,640 km (0.088 R)
• M6: 3,137,516 km (0.053 R)
• M7: 3,572,996 km (0.084 R)
• M8: 4,061,881 km (0.092 R)
• M9: 4,850,561 km (0.032 R)

Planet 5 - Gas Giant

Semi-Major Axis: 0.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 763.2

Radius: 12.2

Gravity: 5.13 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 0.97 AU - 0.99 AU

Year: 636 Days

Day: 8.5 Hours

Environment

Temp: -158 °C

Axial Tilt: 0.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 48,307,202 km

• M1: 151,842 km (0.104 R)
• M2: 765,193 km (0.064 R)
• M3: 1,368,372 km (0.086 R)
• M4: 1,932,655 km (0.029 R)
• M5: 2,325,050 km (0.093 R)
• M6: 3,671,132 km (0.114 R)
• M7: 4,357,636 km (0.11 R)
• M8: 4,855,947 km (0.096 R)
• M9: 5,555,317 km (0.104 R)
• M10: 6,961,238 km (0.119 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.07 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 231.8

Radius: 8.8

Gravity: 2.99 G

Time & Orbit

Eccentricity (e): 0.009

Orbit Range: 1.06 AU - 1.08 AU

Year: 726 Days

Day: 14.1 Hours

Environment

Temp: -154 °C

Axial Tilt: 5.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 48,307,202 km

• M1: 109,506 km (0.078 R)
• M2: 485,595 km (0.091 R)
• M3: 809,624 km (0.06 R)
• M4: 1,397,843 km (0.114 R)
• M5: 2,024,209 km (0.102 R)
• M6: 2,487,065 km (0.07 R)
• M7: 3,277,540 km (0.091 R)
• M8: 3,750,119 km (0.085 R)
• M9: 4,464,748 km (0.066 R)
• M10: 5,061,943 km (0.059 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.41 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 108.8

Radius: 8.1

Gravity: 1.66 G

Time & Orbit

Eccentricity (e): 0.003

Orbit Range: 4.4 AU - 4.42 AU

Year: 6075 Days

Day: 10.9 Hours

Environment

Temp: -220 °C

Axial Tilt: 28.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 48,307,202 km

• M1: 100,679 km (0.084 R)
• M2: 547,827 km (0.074 R)
• M3: 1,502,411 km (0.111 R)
• M4: 2,060,561 km (0.061 R)
• M5: 4,081,030 km (0.101 R)
• M6: 4,471,929 km (0.11 R)
• M7: 5,328,826 km (0.077 R)
• M8: 7,099,915 km (0.044 R)
• M9: 8,262,590 km (0.071 R)
• M10: 9,266,391 km (0.044 R)
• M11: 10,882,647 km (0.106 R)
• M12: 12,296,047 km (0.112 R)
• M13: 15,238,787 km (0.061 R)
• M14: 17,108,012 km (0.056 R)
• M15: 17,853,459 km (0.115 R)
• M16: 18,179,582 km (0.099 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 118.4

Radius: 11.9

Gravity: 0.84 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 4.68 AU - 4.94 AU

Year: 6920 Days

Day: 9 Hours

Environment

Temp: -220 °C

Axial Tilt: 23 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 48,307,202 km

• M1: 159,471 km (0.048 R)
• M2: 748,139 km (0.091 R)
• M3: 1,190,201 km (0.109 R)
• M4: 1,706,762 km (0.117 R)
• M5: 2,246,960 km (0.099 R)
• M6: 2,851,186 km (0.109 R)
• M7: 4,050,213 km (0.094 R)
• M8: 4,429,593 km (0.077 R)
• M9: 5,260,759 km (0.044 R)
• M10: 7,987,030 km (0.059 R)
• M11: 9,991,193 km (0.047 R)
• M12: 13,203,508 km (0.086 R)
• M13: 15,168,327 km (0.098 R)
• M14: 18,556,569 km (0.059 R)
• M15: 19,078,665 km (0.08 R)
• M16: 19,491,406 km (0.108 R)
• M17: 20,213,066 km (0.118 R)

Planet 9 - Gas Giant

Semi-Major Axis: 5.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 65.6

Radius: 11.5

Gravity: 0.5 G

Time & Orbit

Eccentricity (e): 0.163

Orbit Range: 4.45 AU - 6.19 AU

Year: 8050 Days

Day: 5.6 Hours

Environment

Temp: -227 °C

Axial Tilt: 47 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 48,307,202 km

• M1: 145,260 km (0.118 R)
• M2: 783,594 km (0.119 R)
• M3: 1,192,893 km (0.09 R)
• M4: 1,682,677 km (0.026 R)
• M5: 2,148,674 km (0.045 R)
• M6: 6,091,177 km (0.065 R)
• M7: 7,499,790 km (0.114 R)
• M8: 8,674,433 km (0.062 R)
• M9: 11,226,273 km (0.029 R)
• M10: 12,164,252 km (0.069 R)
• M11: 13,465,005 km (0.09 R)
• M12: 15,488,466 km (0.069 R)
• M13: 16,495,409 km (0.035 R)
• M14: 18,863,992 km (0.048 R)

Planet 10 - Ice Giant

Semi-Major Axis: 7.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 459.1

Radius: 5.5

Gravity: 15.18 G

Time & Orbit

Eccentricity (e): 0.145

Orbit Range: 6.05 AU - 8.11 AU

Year: 12358 Days

Day: 19.4 Hours

Environment

Temp: -233 °C

Axial Tilt: 36.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 48,307,202 km

• M1: 68,665 km (0.113 R)
• M2: 610,509 km (0.102 R)
• M3: 1,833,621 km (0.084 R)
• M4: 2,531,645 km (0.044 R)
• M5: 3,109,541 km (0.107 R)
• M6: 4,066,519 km (0.112 R)
• M7: 4,856,246 km (0.111 R)
• M8: 5,173,244 km (0.101 R)
• M9: 5,883,834 km (0.083 R)
• M10: 7,290,802 km (0.077 R)
• M11: 9,480,316 km (0.026 R)
• M12: 9,975,635 km (0.084 R)
• M13: 12,892,644 km (0.116 R)
• M14: 15,573,288 km (0.079 R)
• M15: 18,299,410 km (0.044 R)
• M16: 24,124,003 km (0.095 R)
• M17: 29,693,083 km (0.12 R)
• M18: 30,113,303 km (0.092 R)
• M19: 32,273,945 km (0.089 R)
• M20: 32,941,750 km (0.046 R)
• M21: 33,392,040 km (0.112 R)
• M22: 36,180,544 km (0.108 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: 171 - 19,920 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit