🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.29

Radius: 1.79

Gravity: 1.34 G

Time & Orbit

Eccentricity (e): 0.025

Orbit Range: 0.55 AU - 0.57 AU

Year: 275 Days

Day: 22.6 Hours

Environment

Temp: -120 °C

Axial Tilt: 17.7 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 43,341,718 km

• M1: 41,738 km (0.066 R)
• M2: 141,819 km (0.052 R)

Planet 2 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.2

Radius: 0.53

Gravity: 0.71 G

Time & Orbit

Eccentricity (e): 0.077

Orbit Range: 0.6 AU - 0.7 AU

Year: 344 Days

Day: 40.8 Hours

Environment

Temp: -130 °C

Axial Tilt: 36.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Gas Giant

Semi-Major Axis: 0.76 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 565.3

Radius: 8.9

Gravity: 7.14 G

Time & Orbit

Eccentricity (e): 0.136

Orbit Range: 0.66 AU - 0.86 AU

Year: 435 Days

Day: 13.9 Hours

Environment

Temp: -138 °C

Axial Tilt: 173.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 43,341,718 km

• M1: 110,702 km (0.087 R)
• M2: 443,857 km (0.073 R)
• M3: 755,469 km (0.07 R)
• M4: 1,057,059 km (0.114 R)
• M5: 1,572,423 km (0.071 R)
• M6: 2,326,995 km (0.109 R)
• M7: 2,616,916 km (0.067 R)
• M8: 3,059,576 km (0.091 R)
• M9: 3,385,699 km (0.077 R)
• M10: 3,899,268 km (0.094 R)
• M11: 4,421,963 km (0.042 R)
• M12: 4,885,118 km (0.071 R)
• M13: 5,460,472 km (0.115 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.39 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 378.4

Radius: 8.5

Gravity: 5.24 G

Time & Orbit

Eccentricity (e): 0.028

Orbit Range: 1.35 AU - 1.43 AU

Year: 1075 Days

Day: 14.3 Hours

Environment

Temp: -176 °C

Axial Tilt: 24 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 43,341,718 km

• M1: 105,766 km (0.114 R)
• M2: 396,285 km (0.096 R)
• M3: 663,766 km (0.11 R)
• M4: 1,139,487 km (0.095 R)
• M5: 1,527,993 km (0.115 R)
• M6: 1,928,616 km (0.077 R)
• M7: 2,281,816 km (0.045 R)
• M8: 2,643,245 km (0.054 R)
• M9: 3,004,673 km (0.113 R)
• M10: 3,551,902 km (0.085 R)
• M11: 4,211,479 km (0.049 R)
• M12: 4,503,943 km (0.118 R)
• M13: 5,616,802 km (0.095 R)
• M14: 5,911,659 km (0.059 R)
• M15: 6,299,866 km (0.102 R)
• M16: 7,310,848 km (0.081 R)
• M17: 7,710,573 km (0.08 R)
• M18: 8,124,810 km (0.085 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 820.2

Radius: 9.6

Gravity: 8.9 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 1.34 AU - 1.92 AU

Year: 1365 Days

Day: 11.8 Hours

Environment

Temp: -184 °C

Axial Tilt: 12.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 43,341,718 km

• M1: 134,937 km (0.118 R)
• M2: 502,649 km (0.118 R)
• M3: 912,846 km (0.104 R)
• M4: 1,811,481 km (0.082 R)
• M5: 2,356,914 km (0.082 R)
• M6: 2,688,872 km (0.077 R)
• M7: 5,452,094 km (0.119 R)
• M8: 7,333,587 km (0.091 R)
• M9: 8,103,866 km (0.054 R)
• M10: 8,927,253 km (0.086 R)
• M11: 10,602,899 km (0.06 R)
• M12: 11,122,901 km (0.03 R)
• M13: 11,953,169 km (0.098 R)
• M14: 12,402,561 km (0.095 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 130.1

Radius: 11.2

Gravity: 1.04 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 1.6 AU - 1.78 AU

Year: 1441 Days

Day: 8.6 Hours

Environment

Temp: -177 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (12)

Outer Limit: 43,341,718 km

• M1: 141,520 km (0.114 R)
• M2: 537,655 km (0.102 R)
• M3: 1,369,419 km (0.101 R)
• M4: 1,902,586 km (0.079 R)
• M5: 2,257,282 km (0.07 R)
• M6: 2,984,178 km (0.102 R)
• M7: 3,390,037 km (0.106 R)
• M8: 4,090,305 km (0.083 R)
• M9: 4,609,110 km (0.069 R)
• M10: 5,505,202 km (0.108 R)
• M11: 6,100,152 km (0.072 R)
• M12: 7,136,716 km (0.06 R)

Planet 7 - Gas Giant

Semi-Major Axis: 3.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 398.7

Radius: 9.6

Gravity: 4.33 G

Time & Orbit

Eccentricity (e): 0.023

Orbit Range: 3.51 AU - 3.67 AU

Year: 4462 Days

Day: 14.9 Hours

Environment

Temp: -210 °C

Axial Tilt: 7.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (13)

Outer Limit: 43,341,718 km

• M1: 119,379 km (0.039 R)
• M2: 478,264 km (0.104 R)
• M3: 3,239,991 km (0.073 R)
• M4: 5,066,431 km (0.113 R)
• M5: 5,580,599 km (0.09 R)
• M6: 6,416,552 km (0.044 R)
• M7: 7,333,736 km (0.119 R)
• M8: 8,197,215 km (0.062 R)
• M9: 11,237,942 km (0.115 R)
• M10: 13,461,714 km (0.051 R)
• M11: 17,755,921 km (0.089 R)
• M12: 19,492,453 km (0.1 R)
• M13: 22,747,553 km (0.115 R)

Planet 8 - Ice Giant

Semi-Major Axis: 9.96 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 119.1

Radius: 5

Gravity: 4.76 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 9.58 AU - 10.34 AU

Year: 20620 Days

Day: 20.2 Hours

Environment

Temp: -239 °C

Axial Tilt: 37.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 43,341,718 km

• M1: 77,043 km (0.119 R)
• M2: 359,035 km (0.07 R)
• M3: 796,908 km (0.086 R)
• M4: 1,053,618 km (0.066 R)
• M5: 1,314,516 km (0.063 R)
• M6: 1,824,047 km (0.118 R)
• M7: 2,770,253 km (0.1 R)
• M8: 4,085,368 km (0.12 R)
• M9: 5,248,043 km (0.096 R)
• M10: 5,736,031 km (0.09 R)
• M11: 7,029,754 km (0.098 R)
• M12: 7,500,987 km (0.111 R)
• M13: 8,506,584 km (0.062 R)
• M14: 12,168,590 km (0.043 R)
• M15: 19,362,452 km (0.119 R)
• M16: 26,923,578 km (0.117 R)
• M17: 28,758,844 km (0.111 R)
• M18: 36,009,404 km (0.064 R)
• M19: 37,403,806 km (0.09 R)
• M20: 37,639,722 km (0.081 R)
• M21: 39,196,886 km (0.027 R)

Kuiper Belt

Range: 30 - 55 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 168 - 11,458 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit