🌌 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: 2.36

Radius: 1.41

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.012

Orbit Range: 0.53 AU - 0.55 AU

Year: 252 Days

Day: 15.3 Hours

Environment

Temp: -127 °C

Axial Tilt: 3.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.99

Radius: 1

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.1

Orbit Range: 0.59 AU - 0.72 AU

Year: 333 Days

Day: 12.8 Hours

Environment

Temp: -132 °C

Axial Tilt: 12.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.78 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 299.1

Radius: 8.8

Gravity: 3.86 G

Time & Orbit

Eccentricity (e): 0.165

Orbit Range: 0.65 AU - 0.91 AU

Year: 438 Days

Day: 7.7 Hours

Environment

Temp: -137 °C

Axial Tilt: 38.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (6)

Outer Limit: 79,941,954 km

• M1: 109,805 km (0.086 R)
• M2: 393,742 km (0.072 R)
• M3: 673,938 km (0.093 R)
• M4: 1,824,645 km (0.118 R)
• M5: 2,106,637 km (0.079 R)
• M6: 3,701,799 km (0.073 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.9 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 85.4

Radius: 14.2

Gravity: 0.42 G

Time & Orbit

Eccentricity (e): 0.189

Orbit Range: 0.73 AU - 1.07 AU

Year: 543 Days

Day: 8 Hours

Environment

Temp: -163 °C

Axial Tilt: 2.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (3)

Outer Limit: 79,941,954 km

• M1: 176,525 km (0.114 R)
• M2: 1,490,892 km (0.113 R)
• M3: 2,787,607 km (0.082 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 250.6

Radius: 10.2

Gravity: 2.41 G

Time & Orbit

Eccentricity (e): 0.116

Orbit Range: 1.77 AU - 2.23 AU

Year: 1798 Days

Day: 12.5 Hours

Environment

Temp: -186 °C

Axial Tilt: 35.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 79,941,954 km

• M1: 126,859 km (0.107 R)
• M2: 487,240 km (0.093 R)
• M3: 955,631 km (0.07 R)
• M4: 1,533,827 km (0.117 R)
• M5: 2,505,615 km (0.113 R)
• M6: 3,461,695 km (0.098 R)
• M7: 5,592,118 km (0.103 R)
• M8: 6,210,705 km (0.098 R)
• M9: 7,235,750 km (0.107 R)
• M10: 8,342,774 km (0.094 R)
• M11: 10,381,045 km (0.034 R)

Planet 6 - Ice Giant

Semi-Major Axis: 6.52 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 334.8

Radius: 6.3

Gravity: 8.44 G

Time & Orbit

Eccentricity (e): 0.072

Orbit Range: 6.05 AU - 6.99 AU

Year: 10585 Days

Day: 19.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 27.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (31)

Outer Limit: 79,941,954 km

• M1: 78,389 km (0.104 R)
• M2: 579,841 km (0.086 R)
• M3: 866,022 km (0.103 R)
• M4: 1,278,463 km (0.062 R)
• M5: 1,657,694 km (0.093 R)
• M6: 2,399,999 km (0.084 R)
• M7: 3,104,006 km (0.095 R)
• M8: 3,344,560 km (0.096 R)
• M9: 4,326,071 km (0.119 R)
• M10: 6,554,481 km (0.06 R)
• M11: 8,831,510 km (0.047 R)
• M12: 10,629,378 km (0.115 R)
• M13: 10,976,145 km (0.104 R)
• M14: 12,879,778 km (0.051 R)
• M15: 13,273,969 km (0.045 R)
• M16: 15,745,924 km (0.083 R)
• M17: 16,326,962 km (0.101 R)
• M18: 16,989,232 km (0.12 R)
• M19: 17,876,646 km (0.091 R)
• M20: 18,866,535 km (0.106 R)
• M21: 19,083,303 km (0.093 R)
• M22: 21,816,157 km (0.09 R)
• M23: 22,215,284 km (0.12 R)
• M24: 23,608,638 km (0.104 R)
• M25: 24,540,633 km (0.119 R)
• M26: 27,391,370 km (0.115 R)
• M27: 28,515,000 km (0.077 R)
• M28: 28,992,067 km (0.111 R)
• M29: 30,158,931 km (0.081 R)
• M30: 34,489,191 km (0.032 R)
• M31: 37,824,326 km (0.099 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.12 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 174.2

Radius: 4.6

Gravity: 8.23 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 7.2 AU - 11.04 AU

Year: 17512 Days

Day: 18.8 Hours

Environment

Temp: -225 °C

Axial Tilt: 2.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (30)

Outer Limit: 79,941,954 km

• M1: 57,745 km (0.064 R)
• M2: 244,593 km (0.057 R)
• M3: 545,883 km (0.087 R)
• M4: 934,239 km (0.047 R)
• M5: 1,131,857 km (0.087 R)
• M6: 1,460,823 km (0.063 R)
• M7: 1,728,603 km (0.107 R)
• M8: 2,513,394 km (0.07 R)
• M9: 3,027,861 km (0.036 R)
• M10: 4,019,096 km (0.102 R)
• M11: 4,290,467 km (0.068 R)
• M12: 7,229,317 km (0.038 R)
• M13: 8,260,346 km (0.12 R)
• M14: 9,622,434 km (0.074 R)
• M15: 13,488,492 km (0.105 R)
• M16: 13,668,907 km (0.119 R)
• M17: 14,034,524 km (0.086 R)
• M18: 16,095,833 km (0.105 R)
• M19: 19,552,890 km (0.113 R)
• M20: 19,784,019 km (0.098 R)
• M21: 21,947,354 km (0.103 R)
• M22: 23,214,747 km (0.098 R)
• M23: 24,174,717 km (0.093 R)
• M24: 24,619,621 km (0.055 R)
• M25: 24,979,553 km (0.082 R)
• M26: 26,360,491 km (0.038 R)
• M27: 32,286,212 km (0.085 R)
• M28: 35,157,594 km (0.061 R)
• M29: 36,421,995 km (0.11 R)
• M30: 37,955,074 km (0.073 R)

Planet 8 - Ice Giant

Semi-Major Axis: 11.18 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 562.5

Radius: 3.7

Gravity: 41.09 G

Time & Orbit

Eccentricity (e): 0.066

Orbit Range: 10.44 AU - 11.92 AU

Year: 23768 Days

Day: 22.7 Hours

Environment

Temp: -242 °C

Axial Tilt: 29.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (29)

Outer Limit: 79,941,954 km

• M1: 46,525 km (0.103 R)
• M2: 170,691 km (0.066 R)
• M3: 294,708 km (0.089 R)
• M4: 431,590 km (0.11 R)
• M5: 1,030,879 km (0.085 R)
• M6: 1,994,588 km (0.103 R)
• M7: 2,312,933 km (0.075 R)
• M8: 3,804,723 km (0.104 R)
• M9: 4,640,975 km (0.108 R)
• M10: 5,881,141 km (0.093 R)
• M11: 10,959,091 km (0.07 R)
• M12: 12,075,839 km (0.048 R)
• M13: 15,715,406 km (0.093 R)
• M14: 16,288,665 km (0.083 R)
• M15: 18,449,756 km (0.116 R)
• M16: 19,179,793 km (0.11 R)
• M17: 22,190,600 km (0.113 R)
• M18: 28,400,707 km (0.109 R)
• M19: 30,872,064 km (0.057 R)
• M20: 34,294,265 km (0.119 R)
• M21: 36,379,210 km (0.119 R)
• M22: 41,414,675 km (0.109 R)
• M23: 44,098,012 km (0.04 R)
• M24: 45,235,853 km (0.109 R)
• M25: 48,594,475 km (0.096 R)
• M26: 58,484,540 km (0.092 R)
• M27: 61,855,129 km (0.095 R)
• M28: 62,260,091 km (0.101 R)
• M29: 65,143,739 km (0.098 R)

Kuiper Belt

Range: 30 - 52 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 269 - 18,768 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit