🌌 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: 3.76

Radius: 1.7

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.018

Orbit Range: 0.61 AU - 0.63 AU

Year: 315 Days

Day: 14.3 Hours

Environment

Temp: -139 °C

Axial Tilt: 15.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 379.2

Radius: 9.3

Gravity: 4.38 G

Time & Orbit

Eccentricity (e): 0.149

Orbit Range: 0.71 AU - 0.97 AU

Year: 497 Days

Day: 13.5 Hours

Environment

Temp: -158 °C

Axial Tilt: 38.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 30,316,505 km

• M1: 115,639 km (0.1 R)
• M2: 419,772 km (0.112 R)
• M3: 713,133 km (0.083 R)
• M4: 1,010,384 km (0.092 R)
• M5: 1,362,238 km (0.087 R)
• M6: 1,855,462 km (0.053 R)
• M7: 2,157,201 km (0.04 R)
• M8: 2,841,163 km (0.119 R)
• M9: 4,316,048 km (0.045 R)
• M10: 4,822,437 km (0.058 R)
• M11: 5,320,897 km (0.117 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.89 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 33

Radius: 11.1

Gravity: 0.27 G

Time & Orbit

Eccentricity (e): 0.169

Orbit Range: 0.74 AU - 1.04 AU

Year: 542 Days

Day: 13.7 Hours

Environment

Temp: -158 °C

Axial Tilt: 12.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (5)

Outer Limit: 30,316,505 km

• M1: 138,079 km (0.081 R)
• M2: 591,510 km (0.095 R)
• M3: 972,087 km (0.078 R)
• M4: 1,577,360 km (0.095 R)
• M5: 2,098,409 km (0.12 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 534.9

Radius: 10.7

Gravity: 4.67 G

Time & Orbit

Eccentricity (e): 0.111

Orbit Range: 0.88 AU - 1.1 AU

Year: 636 Days

Day: 6.6 Hours

Environment

Temp: -149 °C

Axial Tilt: 16.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 30,316,505 km

• M1: 132,993 km (0.071 R)
• M2: 835,803 km (0.106 R)
• M3: 1,384,229 km (0.089 R)
• M4: 1,753,736 km (0.043 R)
• M5: 2,098,858 km (0.09 R)
• M6: 2,730,012 km (0.107 R)
• M7: 3,150,082 km (0.05 R)
• M8: 3,509,267 km (0.096 R)
• M9: 3,923,503 km (0.074 R)
• M10: 4,723,852 km (0.091 R)
• M11: 5,315,512 km (0.096 R)
• M12: 6,161,637 km (0.036 R)
• M13: 6,868,637 km (0.107 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.24 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 825.5

Radius: 8.9

Gravity: 10.42 G

Time & Orbit

Eccentricity (e): 0.161

Orbit Range: 1.04 AU - 1.44 AU

Year: 892 Days

Day: 14.6 Hours

Environment

Temp: -168 °C

Axial Tilt: 21.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 30,316,505 km

• M1: 110,702 km (0.092 R)
• M2: 459,565 km (0.114 R)
• M3: 809,773 km (0.114 R)
• M4: 1,331,870 km (0.092 R)
• M5: 1,822,700 km (0.075 R)
• M6: 2,604,499 km (0.041 R)
• M7: 3,760,442 km (0.093 R)
• M8: 4,496,014 km (0.107 R)
• M9: 5,382,980 km (0.117 R)
• M10: 5,662,429 km (0.066 R)
• M11: 7,874,982 km (0.085 R)
• M12: 9,733,436 km (0.1 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.3 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 145.2

Radius: 13.7

Gravity: 0.77 G

Time & Orbit

Eccentricity (e): 0.007

Orbit Range: 4.27 AU - 4.33 AU

Year: 5757 Days

Day: 5.5 Hours

Environment

Temp: -222 °C

Axial Tilt: 23.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 30,316,505 km

• M1: 183,257 km (0.103 R)
• M2: 689,347 km (0.078 R)
• M3: 1,444,218 km (0.088 R)
• M4: 1,969,157 km (0.091 R)
• M5: 2,577,571 km (0.076 R)
• M6: 3,089,645 km (0.088 R)
• M7: 8,051,956 km (0.119 R)
• M8: 9,052,766 km (0.032 R)
• M9: 12,212,572 km (0.061 R)
• M10: 15,539,180 km (0.106 R)
• M11: 16,613,442 km (0.115 R)
• M12: 18,233,138 km (0.076 R)
• M13: 19,428,126 km (0.067 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 336.9

Radius: 10.4

Gravity: 3.11 G

Time & Orbit

Eccentricity (e): 0.204

Orbit Range: 3.77 AU - 5.69 AU

Year: 6642 Days

Day: 10.3 Hours

Environment

Temp: -224 °C

Axial Tilt: 13.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 30,316,505 km

• M1: 129,402 km (0.076 R)
• M2: 540,796 km (0.096 R)
• M3: 1,068,877 km (0.03 R)
• M4: 1,444,966 km (0.098 R)
• M5: 1,856,510 km (0.064 R)
• M6: 3,340,221 km (0.083 R)
• M7: 3,778,543 km (0.046 R)
• M8: 4,137,877 km (0.08 R)
• M9: 4,745,544 km (0.106 R)
• M10: 5,273,624 km (0.054 R)
• M11: 6,897,210 km (0.025 R)
• M12: 7,895,327 km (0.052 R)
• M13: 9,508,141 km (0.064 R)
• M14: 11,890,637 km (0.092 R)
• M15: 14,053,074 km (0.114 R)
• M16: 14,645,781 km (0.047 R)
• M17: 16,465,490 km (0.052 R)
• M18: 19,011,197 km (0.09 R)
• M19: 21,312,610 km (0.11 R)
• M20: 22,312,074 km (0.083 R)
• M21: 28,290,154 km (0.096 R)

Planet 8 - Gas Giant

Semi-Major Axis: 5.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 429.1

Radius: 8.2

Gravity: 6.38 G

Time & Orbit

Eccentricity (e): 0.056

Orbit Range: 5.6 AU - 6.26 AU

Year: 9324 Days

Day: 5.7 Hours

Environment

Temp: -219 °C

Axial Tilt: 28.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (28)

Outer Limit: 30,316,505 km

• M1: 114,742 km (0.089 R)
• M2: 608,714 km (0.118 R)
• M3: 1,135,149 km (0.074 R)
• M4: 1,479,673 km (0.105 R)
• M5: 1,893,311 km (0.068 R)
• M6: 2,792,693 km (0.027 R)
• M7: 3,227,724 km (0.118 R)
• M8: 3,951,927 km (0.088 R)
• M9: 5,686,963 km (0.106 R)
• M10: 8,325,720 km (0.103 R)
• M11: 8,704,651 km (0.114 R)
• M12: 10,384,336 km (0.11 R)
• M13: 10,774,188 km (0.068 R)
• M14: 11,479,841 km (0.096 R)
• M15: 12,760,698 km (0.091 R)
• M16: 13,208,146 km (0.094 R)
• M17: 13,723,959 km (0.092 R)
• M18: 14,075,215 km (0.108 R)
• M19: 14,613,318 km (0.066 R)
• M20: 15,730,665 km (0.102 R)
• M21: 16,704,547 km (0.1 R)
• M22: 16,970,831 km (0.067 R)
• M23: 17,856,151 km (0.088 R)
• M24: 26,166,912 km (0.09 R)
• M25: 32,632,382 km (0.12 R)
• M26: 35,076,512 km (0.106 R)
• M27: 35,954,502 km (0.064 R)
• M28: 36,734,655 km (0.09 R)

Planet 9 - Ice Giant

Semi-Major Axis: 8.07 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 79.1

Radius: 7.4

Gravity: 1.44 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 7.37 AU - 8.77 AU

Year: 14802 Days

Day: 23.4 Hours

Environment

Temp: -236 °C

Axial Tilt: 39.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 30,316,505 km

• M1: 92,302 km (0.107 R)
• M2: 799,152 km (0.111 R)
• M3: 1,063,940 km (0.057 R)
• M4: 1,525,749 km (0.026 R)
• M5: 1,954,795 km (0.108 R)
• M6: 2,528,802 km (0.093 R)
• M7: 5,989,151 km (0.069 R)
• M8: 7,400,457 km (0.094 R)
• M9: 7,794,498 km (0.083 R)
• M10: 8,315,996 km (0.102 R)
• M11: 10,458,986 km (0.117 R)
• M12: 11,373,328 km (0.064 R)
• M13: 14,215,538 km (0.092 R)
• M14: 15,567,005 km (0.101 R)
• M15: 16,035,845 km (0.06 R)
• M16: 21,760,506 km (0.092 R)
• M17: 23,398,005 km (0.117 R)
• M18: 24,560,530 km (0.096 R)
• M19: 27,677,102 km (0.119 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 344 - 19,945 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit