🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.31 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.22

Radius: 1.08

Gravity: 1.05 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 0.51 AU - 0.73 AU

Year: 320 Days

Day: 39.7 Hours

Environment

Temp: -137 °C

Axial Tilt: 49.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.73

Radius: 0.88

Gravity: 0.94 G

Time & Orbit

Eccentricity (e): 0.105

Orbit Range: 0.55 AU - 0.69 AU

Year: 320 Days

Day: 12.6 Hours

Environment

Temp: -126 °C

Axial Tilt: 176.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 688.2

Radius: 14.3

Gravity: 3.37 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 0.7 AU - 0.92 AU

Year: 478 Days

Day: 14.4 Hours

Environment

Temp: -154 °C

Axial Tilt: 39.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 67,985,301 km

• M1: 178,021 km (0.104 R)
• M2: 918,980 km (0.042 R)
• M3: 1,453,194 km (0.108 R)
• M4: 1,985,613 km (0.114 R)
• M5: 2,472,254 km (0.105 R)
• M6: 2,962,487 km (0.094 R)
• M7: 3,481,142 km (0.037 R)
• M8: 4,719,214 km (0.025 R)
• M9: 5,186,558 km (0.096 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 215.5

Radius: 11.5

Gravity: 1.63 G

Time & Orbit

Eccentricity (e): 0.02

Orbit Range: 2.11 AU - 2.19 AU

Year: 2068 Days

Day: 11.4 Hours

Environment

Temp: -201 °C

Axial Tilt: 21 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 67,985,301 km

• M1: 143,016 km (0.089 R)
• M2: 800,648 km (0.104 R)
• M3: 1,645,128 km (0.12 R)
• M4: 2,562,462 km (0.078 R)
• M5: 3,394,226 km (0.117 R)
• M6: 4,540,445 km (0.1 R)
• M7: 5,993,788 km (0.081 R)
• M8: 8,052,554 km (0.119 R)
• M9: 8,487,435 km (0.086 R)
• M10: 9,673,597 km (0.084 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.92 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 176.1

Radius: 9.7

Gravity: 1.87 G

Time & Orbit

Eccentricity (e): 0.219

Orbit Range: 3.06 AU - 4.78 AU

Year: 5091 Days

Day: 14.7 Hours

Environment

Temp: -204 °C

Axial Tilt: 48.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 67,985,301 km

• M1: 121,025 km (0.106 R)
• M2: 476,020 km (0.07 R)
• M3: 1,014,274 km (0.111 R)
• M4: 1,541,307 km (0.081 R)
• M5: 1,857,108 km (0.117 R)
• M6: 2,243,220 km (0.056 R)
• M7: 3,044,915 km (0.087 R)
• M8: 3,386,597 km (0.111 R)
• M9: 4,547,476 km (0.027 R)
• M10: 4,995,821 km (0.116 R)
• M11: 5,774,478 km (0.078 R)
• M12: 6,716,496 km (0.096 R)
• M13: 7,572,046 km (0.09 R)
• M14: 8,106,409 km (0.064 R)
• M15: 8,699,266 km (0.088 R)
• M16: 12,319,085 km (0.088 R)
• M17: 13,014,416 km (0.057 R)
• M18: 14,106,032 km (0.096 R)
• M19: 17,583,883 km (0.107 R)
• M20: 18,577,363 km (0.063 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 872.8

Radius: 11.7

Gravity: 6.38 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 3.96 AU - 5.86 AU

Year: 7137 Days

Day: 9.1 Hours

Environment

Temp: -218 °C

Axial Tilt: 9.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (27)

Outer Limit: 67,985,301 km

• M1: 145,559 km (0.101 R)
• M2: 986,897 km (0.117 R)
• M3: 1,413,700 km (0.088 R)
• M4: 1,933,852 km (0.069 R)
• M5: 3,016,641 km (0.109 R)
• M6: 4,922,219 km (0.092 R)
• M7: 6,407,576 km (0.091 R)
• M8: 8,048,665 km (0.026 R)
• M9: 8,596,043 km (0.117 R)
• M10: 9,440,523 km (0.092 R)
• M11: 10,885,339 km (0.034 R)
• M12: 12,807,971 km (0.115 R)
• M13: 13,321,990 km (0.076 R)
• M14: 15,072,733 km (0.084 R)
• M15: 16,233,613 km (0.096 R)
• M16: 16,836,044 km (0.07 R)
• M17: 17,245,942 km (0.046 R)
• M18: 18,014,576 km (0.039 R)
• M19: 18,515,579 km (0.062 R)
• M20: 19,998,393 km (0.112 R)
• M21: 22,450,900 km (0.093 R)
• M22: 25,097,586 km (0.084 R)
• M23: 30,293,868 km (0.112 R)
• M24: 31,826,648 km (0.102 R)
• M25: 35,491,197 km (0.11 R)
• M26: 39,069,279 km (0.092 R)
• M27: 39,788,695 km (0.079 R)

Planet 7 - Ice Giant

Semi-Major Axis: 6.29 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 221.1

Radius: 7.5

Gravity: 3.93 G

Time & Orbit

Eccentricity (e): 0.112

Orbit Range: 5.59 AU - 6.99 AU

Year: 10349 Days

Day: 16.4 Hours

Environment

Temp: -221 °C

Axial Tilt: 41.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 67,985,301 km

• M1: 95,892 km (0.112 R)
• M2: 417,528 km (0.085 R)
• M3: 1,848,282 km (0.115 R)
• M4: 2,083,300 km (0.099 R)
• M5: 4,162,112 km (0.119 R)
• M6: 5,859,300 km (0.101 R)
• M7: 6,208,312 km (0.034 R)
• M8: 7,303,218 km (0.055 R)
• M9: 9,781,756 km (0.069 R)
• M10: 11,599,819 km (0.111 R)
• M11: 12,614,541 km (0.114 R)
• M12: 16,012,956 km (0.12 R)

Planet 8 - Ice Giant

Semi-Major Axis: 8.42 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 618.9

Radius: 6.8

Gravity: 13.38 G

Time & Orbit

Eccentricity (e): 0.146

Orbit Range: 7.19 AU - 9.65 AU

Year: 16028 Days

Day: 17.5 Hours

Environment

Temp: -220 °C

Axial Tilt: 36.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 67,985,301 km

• M1: 84,822 km (0.116 R)
• M2: 298,448 km (0.063 R)
• M3: 569,070 km (0.108 R)
• M4: 939,026 km (0.101 R)
• M5: 1,304,493 km (0.108 R)
• M6: 1,567,187 km (0.09 R)
• M7: 2,597,617 km (0.115 R)
• M8: 3,507,771 km (0.053 R)
• M9: 3,786,621 km (0.092 R)
• M10: 7,678,859 km (0.041 R)
• M11: 10,571,932 km (0.085 R)
• M12: 12,838,489 km (0.106 R)
• M13: 14,827,243 km (0.027 R)
• M14: 17,250,280 km (0.055 R)
• M15: 19,318,022 km (0.118 R)
• M16: 28,906,797 km (0.063 R)
• M17: 34,142,722 km (0.094 R)
• M18: 35,673,258 km (0.103 R)
• M19: 37,115,830 km (0.12 R)
• M20: 50,736,118 km (0.044 R)
• M21: 55,983,712 km (0.103 R)
• M22: 63,464,204 km (0.115 R)

Planet 9 - Ice Giant

Semi-Major Axis: 10.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 430.5

Radius: 4.7

Gravity: 19.49 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 8.54 AU - 11.82 AU

Year: 21307 Days

Day: 22.5 Hours

Environment

Temp: -235 °C

Axial Tilt: 4.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 67,985,301 km

• M1: 61,186 km (0.114 R)
• M2: 321,336 km (0.063 R)
• M3: 585,676 km (0.092 R)
• M4: 985,850 km (0.117 R)
• M5: 1,365,978 km (0.117 R)
• M6: 1,533,677 km (0.116 R)
• M7: 3,555,193 km (0.088 R)
• M8: 4,181,560 km (0.033 R)
• M9: 4,373,195 km (0.068 R)
• M10: 5,127,018 km (0.091 R)
• M11: 5,346,927 km (0.107 R)
• M12: 5,572,969 km (0.098 R)
• M13: 10,636,109 km (0.034 R)
• M14: 14,223,018 km (0.08 R)
• M15: 16,404,454 km (0.12 R)
• M16: 23,059,016 km (0.096 R)
• M17: 23,758,984 km (0.108 R)
• M18: 26,591,919 km (0.09 R)
• M19: 37,237,752 km (0.118 R)
• M20: 39,038,761 km (0.062 R)
• M21: 50,574,103 km (0.075 R)
• M22: 57,382,452 km (0.118 R)
• M23: 57,747,172 km (0.065 R)
• M24: 63,990,639 km (0.116 R)
• M25: 64,382,884 km (0.096 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 247 - 17,454 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit