🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.3 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.63

Radius: 1.67

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.083

Orbit Range: 0.55 AU - 0.65 AU

Year: 305 Days

Day: 20.4 Hours

Environment

Temp: -130 °C

Axial Tilt: 9.2 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 30,022,015 km

• M1: 45,777 km (0.102 R)
• M2: 360,082 km (0.091 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.75 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 42.2

Radius: 11

Gravity: 0.35 G

Time & Orbit

Eccentricity (e): 0.184

Orbit Range: 0.61 AU - 0.89 AU

Year: 426 Days

Day: 14.1 Hours

Environment

Temp: -135 °C

Axial Tilt: 2.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (4)

Outer Limit: 30,022,015 km

• M1: 139,276 km (0.104 R)
• M2: 613,202 km (0.1 R)
• M3: 1,191,846 km (0.099 R)
• M4: 1,673,551 km (0.103 R)

Planet 3 - Gas Giant

Semi-Major Axis: 0.84 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 292.6

Radius: 12.4

Gravity: 1.9 G

Time & Orbit

Eccentricity (e): 0.141

Orbit Range: 0.72 AU - 0.96 AU

Year: 505 Days

Day: 6.6 Hours

Environment

Temp: -155 °C

Axial Tilt: 46.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (11)

Outer Limit: 30,022,015 km

• M1: 155,283 km (0.05 R)
• M2: 637,736 km (0.104 R)
• M3: 1,057,807 km (0.102 R)
• M4: 1,490,743 km (0.078 R)
• M5: 1,922,781 km (0.118 R)
• M6: 2,318,617 km (0.097 R)
• M7: 2,798,378 km (0.076 R)
• M8: 3,235,952 km (0.047 R)
• M9: 3,707,484 km (0.054 R)
• M10: 4,097,486 km (0.096 R)
• M11: 4,651,297 km (0.092 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.1 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 41.7

Radius: 13

Gravity: 0.25 G

Time & Orbit

Eccentricity (e): 0.137

Orbit Range: 0.95 AU - 1.25 AU

Year: 757 Days

Day: 14.5 Hours

Environment

Temp: -153 °C

Axial Tilt: 7.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (5)

Outer Limit: 30,022,015 km

• M1: 245,041 km (0.092 R)
• M2: 1,031,627 km (0.11 R)
• M3: 1,818,661 km (0.085 R)
• M4: 2,226,166 km (0.118 R)
• M5: 3,039,230 km (0.055 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.23 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 68.1

Radius: 10

Gravity: 0.68 G

Time & Orbit

Eccentricity (e): 0.202

Orbit Range: 0.98 AU - 1.48 AU

Year: 895 Days

Day: 6.3 Hours

Environment

Temp: -171 °C

Axial Tilt: 14.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (5)

Outer Limit: 30,022,015 km

• M1: 124,465 km (0.079 R)
• M2: 651,349 km (0.044 R)
• M3: 1,090,120 km (0.105 R)
• M4: 1,476,082 km (0.079 R)
• M5: 2,861,358 km (0.101 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.4 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 826.9

Radius: 14.4

Gravity: 3.99 G

Time & Orbit

Eccentricity (e): 0.176

Orbit Range: 1.15 AU - 1.65 AU

Year: 1087 Days

Day: 12.5 Hours

Environment

Temp: -172 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 30,022,015 km

• M1: 179,069 km (0.111 R)
• M2: 768,185 km (0.09 R)
• M3: 1,500,766 km (0.103 R)
• M4: 2,103,795 km (0.115 R)
• M5: 2,688,124 km (0.085 R)
• M6: 3,263,926 km (0.108 R)
• M7: 4,291,963 km (0.097 R)
• M8: 4,891,701 km (0.1 R)
• M9: 5,362,635 km (0.026 R)
• M10: 6,059,911 km (0.068 R)
• M11: 6,627,934 km (0.079 R)
• M12: 8,355,340 km (0.119 R)
• M13: 9,442,917 km (0.112 R)
• M14: 9,990,146 km (0.119 R)

Planet 7 - Gas Giant

Semi-Major Axis: 1.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 450.5

Radius: 12.4

Gravity: 2.93 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 1.62 AU - 2.36 AU

Year: 1842 Days

Day: 12.2 Hours

Environment

Temp: -182 °C

Axial Tilt: 2.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 30,022,015 km

• M1: 154,235 km (0.114 R)
• M2: 555,457 km (0.061 R)
• M3: 988,842 km (0.118 R)
• M4: 1,565,691 km (0.049 R)
• M5: 2,196,695 km (0.109 R)
• M6: 2,650,425 km (0.059 R)
• M7: 3,241,636 km (0.058 R)
• M8: 4,348,212 km (0.091 R)
• M9: 4,827,972 km (0.099 R)
• M10: 5,385,823 km (0.076 R)
• M11: 5,781,359 km (0.034 R)
• M12: 6,362,996 km (0.104 R)
• M13: 6,856,220 km (0.117 R)
• M14: 9,306,035 km (0.08 R)
• M15: 9,910,261 km (0.034 R)
• M16: 11,091,934 km (0.101 R)
• M17: 11,955,114 km (0.113 R)
• M18: 12,901,320 km (0.106 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.93 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 326.4

Radius: 8

Gravity: 5.1 G

Time & Orbit

Eccentricity (e): 0.021

Orbit Range: 4.83 AU - 5.03 AU

Year: 7181 Days

Day: 10.9 Hours

Environment

Temp: -225 °C

Axial Tilt: 26.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (19)

Outer Limit: 30,022,015 km

• M1: 100,530 km (0.072 R)
• M2: 836,850 km (0.063 R)
• M3: 1,234,482 km (0.118 R)
• M4: 1,578,557 km (0.086 R)
• M5: 2,332,231 km (0.095 R)
• M6: 3,598,278 km (0.102 R)
• M7: 3,976,012 km (0.109 R)
• M8: 4,479,110 km (0.061 R)
• M9: 4,863,726 km (0.102 R)
• M10: 5,159,780 km (0.049 R)
• M11: 5,788,091 km (0.109 R)
• M12: 6,307,645 km (0.12 R)
• M13: 9,549,730 km (0.097 R)
• M14: 9,972,044 km (0.072 R)
• M15: 11,980,695 km (0.106 R)
• M16: 19,264,915 km (0.079 R)
• M17: 24,245,626 km (0.099 R)
• M18: 26,822,001 km (0.091 R)
• M19: 28,695,564 km (0.116 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: 534 - 12,184 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit