🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.26 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.29

Radius: 1.39

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.086

Orbit Range: 0.47 AU - 0.55 AU

Year: 235 Days

Day: 22.7 Hours

Environment

Temp: -108 °C

Axial Tilt: 8.7 °

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: 4.07

Radius: 1.75

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.048

Orbit Range: 0.59 AU - 0.65 AU

Year: 315 Days

Day: 38.2 Hours

Environment

Temp: -135 °C

Axial Tilt: 33.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.73 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 864.1

Radius: 12.3

Gravity: 5.71 G

Time & Orbit

Eccentricity (e): 0.002

Orbit Range: 0.73 AU - 0.73 AU

Year: 403 Days

Day: 8.2 Hours

Environment

Temp: -137 °C

Axial Tilt: 48.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 21,911,634 km

• M1: 153,039 km (0.093 R)
• M2: 589,266 km (0.119 R)
• M3: 1,071,570 km (0.086 R)
• M4: 1,679,087 km (0.084 R)
• M5: 2,213,899 km (0.115 R)
• M6: 2,635,615 km (0.041 R)
• M7: 4,306,773 km (0.118 R)
• M8: 5,804,697 km (0.077 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 343.8

Radius: 12.8

Gravity: 2.1 G

Time & Orbit

Eccentricity (e): 0.224

Orbit Range: 0.78 AU - 1.24 AU

Year: 655 Days

Day: 9.5 Hours

Environment

Temp: -162 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 21,911,634 km

• M1: 159,172 km (0.118 R)
• M2: 826,379 km (0.077 R)
• M3: 1,247,347 km (0.087 R)
• M4: 2,081,355 km (0.065 R)
• M5: 2,745,271 km (0.113 R)
• M6: 3,671,431 km (0.068 R)
• M7: 4,214,621 km (0.078 R)
• M8: 5,154,095 km (0.068 R)
• M9: 6,066,343 km (0.105 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 679.9

Radius: 9.2

Gravity: 8.03 G

Time & Orbit

Eccentricity (e): 0.181

Orbit Range: 1.27 AU - 1.83 AU

Year: 1246 Days

Day: 11.4 Hours

Environment

Temp: -181 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 21,911,634 km

• M1: 114,442 km (0.037 R)
• M2: 408,552 km (0.081 R)
• M3: 1,047,185 km (0.051 R)
• M4: 1,388,418 km (0.098 R)
• M5: 2,200,136 km (0.101 R)
• M6: 3,343,662 km (0.075 R)
• M7: 3,747,576 km (0.097 R)
• M8: 4,201,307 km (0.1 R)
• M9: 4,728,938 km (0.11 R)
• M10: 5,178,330 km (0.036 R)
• M11: 5,828,931 km (0.088 R)
• M12: 6,254,089 km (0.094 R)
• M13: 6,844,701 km (0.063 R)
• M14: 7,707,282 km (0.086 R)
• M15: 8,055,546 km (0.05 R)
• M16: 9,555,414 km (0.117 R)
• M17: 9,989,248 km (0.106 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.74 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 409.7

Radius: 10.3

Gravity: 3.86 G

Time & Orbit

Eccentricity (e): 0.155

Orbit Range: 1.47 AU - 2.01 AU

Year: 1482 Days

Day: 14.4 Hours

Environment

Temp: -182 °C

Axial Tilt: 48.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (16)

Outer Limit: 21,911,634 km

• M1: 129,552 km (0.099 R)
• M2: 717,771 km (0.099 R)
• M3: 1,106,875 km (0.059 R)
• M4: 1,492,538 km (0.078 R)
• M5: 1,859,651 km (0.096 R)
• M6: 2,242,771 km (0.088 R)
• M7: 2,591,933 km (0.119 R)
• M8: 3,198,851 km (0.105 R)
• M9: 3,737,852 km (0.108 R)
• M10: 4,301,537 km (0.079 R)
• M11: 4,677,477 km (0.027 R)
• M12: 5,075,407 km (0.12 R)
• M13: 7,240,238 km (0.077 R)
• M14: 9,093,157 km (0.097 R)
• M15: 9,474,781 km (0.097 R)
• M16: 11,276,239 km (0.086 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.97 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 504.5

Radius: 11.2

Gravity: 4.02 G

Time & Orbit

Eccentricity (e): 0.017

Orbit Range: 1.94 AU - 2 AU

Year: 1785 Days

Day: 12 Hours

Environment

Temp: -179 °C

Axial Tilt: 14.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 21,911,634 km

• M1: 141,669 km (0.082 R)
• M2: 697,126 km (0.115 R)
• M3: 1,075,609 km (0.101 R)
• M4: 1,461,571 km (0.092 R)
• M5: 1,930,860 km (0.103 R)
• M6: 2,486,915 km (0.093 R)
• M7: 3,392,730 km (0.059 R)
• M8: 4,919,975 km (0.072 R)
• M9: 5,847,631 km (0.035 R)
• M10: 6,862,802 km (0.086 R)
• M11: 7,359,018 km (0.089 R)
• M12: 9,365,724 km (0.069 R)
• M13: 11,137,412 km (0.091 R)
• M14: 12,196,266 km (0.09 R)
• M15: 13,602,635 km (0.064 R)

Planet 8 - Gas Giant

Semi-Major Axis: 2.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 793.4

Radius: 11.8

Gravity: 5.7 G

Time & Orbit

Eccentricity (e): 0.09

Orbit Range: 1.83 AU - 2.19 AU

Year: 1840 Days

Day: 10.9 Hours

Environment

Temp: -195 °C

Axial Tilt: 31.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 21,911,634 km

• M1: 146,756 km (0.118 R)
• M2: 516,412 km (0.065 R)
• M3: 887,115 km (0.098 R)
• M4: 1,291,778 km (0.115 R)
• M5: 1,687,015 km (0.116 R)
• M6: 2,080,458 km (0.106 R)
• M7: 2,481,978 km (0.106 R)
• M8: 2,905,490 km (0.095 R)
• M9: 4,640,227 km (0.113 R)
• M10: 5,288,434 km (0.109 R)
• M11: 5,922,580 km (0.1 R)
• M12: 6,424,630 km (0.088 R)
• M13: 9,643,528 km (0.091 R)
• M14: 10,304,152 km (0.109 R)
• M15: 10,736,938 km (0.032 R)
• M16: 11,485,077 km (0.102 R)
• M17: 12,877,684 km (0.116 R)

Planet 9 - Ice Giant

Semi-Major Axis: 7.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 678.1

Radius: 4.5

Gravity: 33.49 G

Time & Orbit

Eccentricity (e): 0.035

Orbit Range: 6.83 AU - 7.33 AU

Year: 12164 Days

Day: 19 Hours

Environment

Temp: -220 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 21,911,634 km

• M1: 88,263 km (0.074 R)
• M2: 291,417 km (0.049 R)
• M3: 581,487 km (0.101 R)
• M4: 2,269,549 km (0.087 R)
• M5: 2,468,365 km (0.059 R)
• M6: 2,788,205 km (0.091 R)
• M7: 3,749,222 km (0.091 R)
• M8: 4,847,869 km (0.111 R)
• M9: 8,197,664 km (0.113 R)
• M10: 9,503,803 km (0.075 R)
• M11: 18,154,001 km (0.043 R)
• M12: 19,601,211 km (0.112 R)
• M13: 21,824,684 km (0.114 R)
• M14: 24,021,379 km (0.116 R)
• M15: 25,270,671 km (0.102 R)
• M16: 26,765,303 km (0.12 R)
• M17: 27,898,058 km (0.102 R)
• M18: 29,602,127 km (0.028 R)
• M19: 30,590,670 km (0.057 R)
• M20: 35,007,248 km (0.047 R)
• M21: 43,374,107 km (0.093 R)

Planet 10 - Ice Giant

Semi-Major Axis: 8.43 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 26.2

Radius: 4.4

Gravity: 1.35 G

Time & Orbit

Eccentricity (e): 0.013

Orbit Range: 8.32 AU - 8.54 AU

Year: 15804 Days

Day: 16.7 Hours

Environment

Temp: -234 °C

Axial Tilt: 25.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 21,911,634 km

• M1: 54,753 km (0.108 R)
• M2: 232,176 km (0.095 R)
• M3: 861,833 km (0.112 R)
• M4: 1,391,559 km (0.08 R)
• M5: 2,626,191 km (0.103 R)
• M6: 2,920,150 km (0.12 R)
• M7: 4,363,471 km (0.088 R)
• M8: 4,775,762 km (0.049 R)
• M9: 6,338,462 km (0.055 R)
• M10: 7,648,490 km (0.057 R)
• M11: 13,242,104 km (0.047 R)
• M12: 15,411,273 km (0.09 R)
• M13: 15,619,514 km (0.111 R)
• M14: 19,513,397 km (0.094 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: 464 - 13,148 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit