🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.55 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.26

Radius: 1.6

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.015

Orbit Range: 0.54 AU - 0.56 AU

Year: 268 Days

Day: 20 Hours

Environment

Temp: -122 °C

Axial Tilt: 42.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 693.8

Radius: 11.7

Gravity: 5.07 G

Time & Orbit

Eccentricity (e): 0.093

Orbit Range: 0.63 AU - 0.75 AU

Year: 376 Days

Day: 6.1 Hours

Environment

Temp: -147 °C

Axial Tilt: 33.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 78,353,898 km

• M1: 145,559 km (0.047 R)
• M2: 578,196 km (0.117 R)
• M3: 1,134,550 km (0.069 R)
• M4: 1,629,570 km (0.039 R)
• M5: 2,573,682 km (0.069 R)
• M6: 3,217,102 km (0.068 R)
• M7: 3,826,714 km (0.108 R)
• M8: 4,401,469 km (0.117 R)
• M9: 4,913,841 km (0.094 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 987

Radius: 15

Gravity: 4.39 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 0.75 AU - 0.85 AU

Year: 469 Days

Day: 14.6 Hours

Environment

Temp: -154 °C

Axial Tilt: 37.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 78,353,898 km

• M1: 189,541 km (0.059 R)
• M2: 751,131 km (0.078 R)
• M3: 1,545,496 km (0.113 R)
• M4: 2,069,986 km (0.073 R)
• M5: 2,559,171 km (0.105 R)
• M6: 3,281,130 km (0.072 R)
• M7: 3,912,882 km (0.108 R)
• M8: 4,640,825 km (0.116 R)
• M9: 5,236,374 km (0.104 R)
• M10: 6,066,642 km (0.117 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.98 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 477.2

Radius: 8.6

Gravity: 6.45 G

Time & Orbit

Eccentricity (e): 0.072

Orbit Range: 0.91 AU - 1.05 AU

Year: 636 Days

Day: 14 Hours

Environment

Temp: -160 °C

Axial Tilt: 14.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 78,353,898 km

• M1: 106,962 km (0.099 R)
• M2: 490,382 km (0.102 R)
• M3: 768,634 km (0.054 R)
• M4: 1,162,525 km (0.087 R)
• M5: 1,554,172 km (0.112 R)
• M6: 2,442,933 km (0.082 R)
• M7: 2,732,405 km (0.061 R)
• M8: 3,079,771 km (0.112 R)
• M9: 3,393,777 km (0.051 R)
• M10: 3,877,577 km (0.046 R)
• M11: 4,244,391 km (0.113 R)
• M12: 4,527,131 km (0.103 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 72.7

Radius: 13.9

Gravity: 0.38 G

Time & Orbit

Eccentricity (e): 0.22

Orbit Range: 1.12 AU - 1.74 AU

Year: 1122 Days

Day: 8.1 Hours

Environment

Temp: -183 °C

Axial Tilt: 41.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (7)

Outer Limit: 78,353,898 km

• M1: 172,935 km (0.107 R)
• M2: 788,381 km (0.088 R)
• M3: 1,314,816 km (0.118 R)
• M4: 2,216,741 km (0.086 R)
• M5: 2,718,941 km (0.057 R)
• M6: 3,156,066 km (0.073 R)
• M7: 4,495,416 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 264.9

Radius: 13.9

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 1.4 AU - 1.5 AU

Year: 1145 Days

Day: 9.7 Hours

Environment

Temp: -185 °C

Axial Tilt: 65.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 78,353,898 km

• M1: 172,935 km (0.086 R)
• M2: 615,296 km (0.073 R)
• M3: 1,738,028 km (0.108 R)
• M4: 2,459,688 km (0.088 R)
• M5: 2,950,519 km (0.091 R)
• M6: 3,602,018 km (0.093 R)
• M7: 4,363,620 km (0.077 R)
• M8: 5,355,604 km (0.099 R)
• M9: 6,012,039 km (0.084 R)
• M10: 6,721,881 km (0.111 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.05 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 215.8

Radius: 9.4

Gravity: 2.44 G

Time & Orbit

Eccentricity (e): 0.127

Orbit Range: 3.54 AU - 4.56 AU

Year: 5347 Days

Day: 12.1 Hours

Environment

Temp: -205 °C

Axial Tilt: 10.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 78,353,898 km

• M1: 117,285 km (0.049 R)
• M2: 665,561 km (0.052 R)
• M3: 1,130,661 km (0.092 R)
• M4: 1,633,160 km (0.037 R)
• M5: 2,465,373 km (0.068 R)
• M6: 3,538,139 km (0.091 R)
• M7: 4,286,129 km (0.075 R)
• M8: 5,185,062 km (0.097 R)
• M9: 5,562,498 km (0.093 R)
• M10: 6,316,321 km (0.057 R)
• M11: 6,776,784 km (0.065 R)
• M12: 7,477,799 km (0.107 R)
• M13: 8,601,728 km (0.088 R)
• M14: 9,059,946 km (0.097 R)
• M15: 12,379,523 km (0.044 R)
• M16: 13,426,110 km (0.045 R)
• M17: 14,188,311 km (0.073 R)
• M18: 14,679,141 km (0.101 R)
• M19: 19,861,810 km (0.102 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.94 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 638.8

Radius: 10.5

Gravity: 5.79 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 4.56 AU - 5.32 AU

Year: 7203 Days

Day: 13.9 Hours

Environment

Temp: -226 °C

Axial Tilt: 20.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 78,353,898 km

• M1: 130,599 km (0.077 R)
• M2: 844,330 km (0.085 R)
• M3: 1,325,138 km (0.091 R)
• M4: 1,752,090 km (0.057 R)
• M5: 2,512,496 km (0.093 R)
• M6: 3,479,796 km (0.111 R)
• M7: 4,988,640 km (0.094 R)
• M8: 9,110,810 km (0.12 R)
• M9: 11,158,206 km (0.085 R)
• M10: 13,103,128 km (0.092 R)
• M11: 15,511,504 km (0.038 R)
• M12: 17,050,567 km (0.074 R)
• M13: 19,692,166 km (0.088 R)
• M14: 24,065,061 km (0.099 R)
• M15: 29,425,602 km (0.098 R)
• M16: 32,688,780 km (0.107 R)

Planet 9 - Ice Giant

Semi-Major Axis: 10.5 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 600.6

Radius: 3

Gravity: 66.73 G

Time & Orbit

Eccentricity (e): 0.067

Orbit Range: 9.8 AU - 11.2 AU

Year: 22320 Days

Day: 21.9 Hours

Environment

Temp: -221 °C

Axial Tilt: 38.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (40)

Outer Limit: 78,353,898 km

• M1: 37,250 km (0.116 R)
• M2: 848,669 km (0.093 R)
• M3: 1,066,782 km (0.09 R)
• M4: 1,544,748 km (0.105 R)
• M5: 2,750,656 km (0.118 R)
• M6: 2,903,246 km (0.073 R)
• M7: 3,940,258 km (0.104 R)
• M8: 4,791,021 km (0.095 R)
• M9: 4,974,728 km (0.116 R)
• M10: 5,201,518 km (0.061 R)
• M11: 6,708,567 km (0.103 R)
• M12: 8,537,102 km (0.101 R)
• M13: 10,797,077 km (0.054 R)
• M14: 11,176,756 km (0.063 R)
• M15: 12,506,831 km (0.025 R)
• M16: 19,065,949 km (0.108 R)
• M17: 22,247,447 km (0.105 R)
• M18: 25,541,892 km (0.108 R)
• M19: 27,015,131 km (0.12 R)
• M20: 30,254,075 km (0.079 R)
• M21: 31,901,896 km (0.045 R)
• M22: 33,876,438 km (0.116 R)
• M23: 34,280,950 km (0.078 R)
• M24: 39,536,922 km (0.076 R)
• M25: 39,835,370 km (0.092 R)
• M26: 41,197,159 km (0.097 R)
• M27: 45,305,117 km (0.114 R)
• M28: 46,621,877 km (0.116 R)
• M29: 47,625,978 km (0.112 R)
• M30: 50,025,079 km (0.063 R)
• M31: 51,077,351 km (0.056 R)
• M32: 52,144,432 km (0.087 R)
• M33: 53,772,655 km (0.075 R)
• M34: 54,139,021 km (0.117 R)
• M35: 54,876,688 km (0.045 R)
• M36: 58,086,908 km (0.115 R)
• M37: 62,424,199 km (0.09 R)
• M38: 68,894,607 km (0.075 R)
• M39: 69,110,476 km (0.101 R)
• M40: 71,073,500 km (0.088 R)

Kuiper Belt

Range: 30 - 59 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 233 - 18,596 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit