🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.27 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.54 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 1.62

Radius: 1.21

Gravity: 1.11 G

Time & Orbit

Eccentricity (e): 0.191

Orbit Range: 0.44 AU - 0.64 AU

Year: 260 Days

Day: 14.8 Hours

Environment

Temp: -127 °C

Axial Tilt: 34.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.59 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.08

Radius: 1.75

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.091

Orbit Range: 0.54 AU - 0.64 AU

Year: 297 Days

Day: 18.6 Hours

Environment

Temp: -136 °C

Axial Tilt: 45.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.67 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.84

Radius: 0.93

Gravity: 0.97 G

Time & Orbit

Eccentricity (e): 0.197

Orbit Range: 0.54 AU - 0.8 AU

Year: 360 Days

Day: 22.1 Hours

Environment

Temp: -139 °C

Axial Tilt: 25.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 4 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 606.2

Radius: 13.1

Gravity: 3.53 G

Time & Orbit

Eccentricity (e): 0.109

Orbit Range: 0.69 AU - 0.85 AU

Year: 443 Days

Day: 11.1 Hours

Environment

Temp: -143 °C

Axial Tilt: 11.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 15,237,231 km

• M1: 162,912 km (0.094 R)
• M2: 592,856 km (0.075 R)
• M3: 1,010,982 km (0.053 R)
• M4: 1,908,570 km (0.119 R)
• M5: 2,377,709 km (0.119 R)
• M6: 2,851,635 km (0.092 R)
• M7: 3,992,767 km (0.063 R)
• M8: 4,711,735 km (0.12 R)
• M9: 5,274,671 km (0.072 R)

Planet 5 - Gas Giant

Semi-Major Axis: 0.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 681.3

Radius: 9.5

Gravity: 7.55 G

Time & Orbit

Eccentricity (e): 0.248

Orbit Range: 0.73 AU - 1.21 AU

Year: 627 Days

Day: 14.9 Hours

Environment

Temp: -161 °C

Axial Tilt: 35.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 15,237,231 km

• M1: 119,529 km (0.117 R)
• M2: 423,212 km (0.12 R)
• M3: 721,361 km (0.12 R)
• M4: 1,035,965 km (0.059 R)
• M5: 1,636,601 km (0.082 R)
• M6: 2,215,844 km (0.102 R)
• M7: 2,733,003 km (0.097 R)
• M8: 3,457,955 km (0.12 R)
• M9: 4,459,812 km (0.116 R)
• M10: 5,662,728 km (0.031 R)
• M11: 6,076,067 km (0.113 R)
• M12: 6,489,256 km (0.107 R)

Planet 6 - Gas Giant

Semi-Major Axis: 3.13 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 266.1

Radius: 11.2

Gravity: 2.12 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 2.76 AU - 3.5 AU

Year: 3633 Days

Day: 8.4 Hours

Environment

Temp: -206 °C

Axial Tilt: 18.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 15,237,231 km

• M1: 139,276 km (0.066 R)
• M2: 490,831 km (0.077 R)
• M3: 1,219,821 km (0.089 R)
• M4: 1,654,552 km (0.098 R)
• M5: 2,890,380 km (0.118 R)
• M6: 3,955,368 km (0.119 R)
• M7: 4,556,751 km (0.089 R)
• M8: 7,097,073 km (0.105 R)
• M9: 9,150,752 km (0.046 R)
• M10: 10,723,026 km (0.095 R)
• M11: 11,974,711 km (0.089 R)
• M12: 12,468,384 km (0.119 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 696.1

Radius: 12.5

Gravity: 4.46 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 3.64 AU - 5.82 AU

Year: 6748 Days

Day: 10.5 Hours

Environment

Temp: -205 °C

Axial Tilt: 23.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 15,237,231 km

• M1: 164,707 km (0.043 R)
• M2: 760,406 km (0.044 R)
• M3: 1,276,818 km (0.081 R)
• M4: 1,807,292 km (0.071 R)
• M5: 2,571,887 km (0.074 R)
• M6: 3,050,151 km (0.111 R)
• M7: 4,341,480 km (0.08 R)
• M8: 4,770,526 km (0.113 R)
• M9: 5,198,526 km (0.081 R)
• M10: 6,264,710 km (0.115 R)
• M11: 7,284,818 km (0.104 R)
• M12: 11,409,680 km (0.072 R)
• M13: 13,481,760 km (0.076 R)
• M14: 15,545,164 km (0.078 R)
• M15: 17,208,692 km (0.065 R)
• M16: 18,566,891 km (0.065 R)
• M17: 26,271,181 km (0.112 R)
• M18: 26,713,393 km (0.076 R)
• M19: 28,905,151 km (0.112 R)
• M20: 31,710,410 km (0.081 R)
• M21: 32,312,841 km (0.108 R)
• M22: 35,762,867 km (0.037 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 909.3

Radius: 13

Gravity: 5.38 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 4.81 AU - 6.11 AU

Year: 8369 Days

Day: 8.4 Hours

Environment

Temp: -228 °C

Axial Tilt: 4.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (27)

Outer Limit: 15,237,231 km

• M1: 161,715 km (0.095 R)
• M2: 612,154 km (0.078 R)
• M3: 1,275,471 km (0.081 R)
• M4: 1,703,770 km (0.059 R)
• M5: 2,212,553 km (0.081 R)
• M6: 3,078,874 km (0.12 R)
• M7: 3,690,430 km (0.092 R)
• M8: 5,285,592 km (0.085 R)
• M9: 5,919,887 km (0.073 R)
• M10: 6,869,684 km (0.05 R)
• M11: 7,585,061 km (0.088 R)
• M12: 8,218,608 km (0.11 R)
• M13: 8,660,370 km (0.094 R)
• M14: 10,181,930 km (0.07 R)
• M15: 11,709,025 km (0.094 R)
• M16: 13,143,669 km (0.054 R)
• M17: 14,373,363 km (0.037 R)
• M18: 15,278,879 km (0.071 R)
• M19: 16,359,874 km (0.098 R)
• M20: 18,825,695 km (0.108 R)
• M21: 22,543,053 km (0.109 R)
• M22: 25,774,217 km (0.111 R)
• M23: 29,302,333 km (0.094 R)
• M24: 30,969,153 km (0.027 R)
• M25: 33,923,860 km (0.091 R)
• M26: 42,189,143 km (0.086 R)
• M27: 44,582,409 km (0.084 R)

Planet 9 - Ice Giant

Semi-Major Axis: 7.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 10.9

Radius: 3.2

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.02

Orbit Range: 7.61 AU - 7.93 AU

Year: 14208 Days

Day: 24.7 Hours

Environment

Temp: -218 °C

Axial Tilt: 11.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 15,237,231 km

• M1: 39,943 km (0.05 R)
• M2: 437,873 km (0.082 R)
• M3: 948,301 km (0.095 R)
• M4: 1,064,389 km (0.111 R)
• M5: 1,290,730 km (0.066 R)
• M6: 1,658,292 km (0.074 R)
• M7: 3,176,860 km (0.112 R)
• M8: 7,279,582 km (0.059 R)
• M9: 8,026,973 km (0.12 R)
• M10: 8,511,520 km (0.113 R)
• M11: 15,191,664 km (0.052 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 544 - 12,967 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit