🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.5 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.99 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.18

Radius: 0.5

Gravity: 0.72 G

Time & Orbit

Eccentricity (e): 0.226

Orbit Range: 0.77 AU - 1.21 AU

Year: 360 Days

Day: 32.3 Hours

Environment

Temp: 36 °C

Axial Tilt: 24 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Planet 2 - Terrestrial

Semi-Major Axis: 1.32 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.56

Radius: 1.46

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.212

Orbit Range: 1.04 AU - 1.6 AU

Year: 554 Days

Day: 44.1 Hours

Environment

Temp: -1 °C

Axial Tilt: 37.8 °

Atmosphere: N₂, O₂

Biome: Oceanic/Continental

Satellites (1)

Outer Limit: 54,908,851 km

• M1: 83,326 km (0.081 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.6 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.54

Radius: 1.45

Gravity: 1.21 G

Time & Orbit

Eccentricity (e): 0.059

Orbit Range: 1.51 AU - 1.69 AU

Year: 739 Days

Day: 22.6 Hours

Environment

Temp: -38 °C

Axial Tilt: 35.5 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 54,908,851 km

• M1: 685,607 km (0.114 R)
• M2: 1,146,069 km (0.109 R)

Planet 4 - Terrestrial

Semi-Major Axis: 2.46 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.74

Radius: 1.5

Gravity: 1.22 G

Time & Orbit

Eccentricity (e): 0.062

Orbit Range: 2.31 AU - 2.61 AU

Year: 1409 Days

Day: 42 Hours

Environment

Temp: -96 °C

Axial Tilt: 6.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 5 - Terrestrial

Semi-Major Axis: 2.64 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.91

Radius: 0.96

Gravity: 0.99 G

Time & Orbit

Eccentricity (e): 0.087

Orbit Range: 2.41 AU - 2.87 AU

Year: 1567 Days

Day: 32.7 Hours

Environment

Temp: -92 °C

Axial Tilt: 32.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 6 - Gas Giant

Semi-Major Axis: 5.6 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 429.4

Radius: 13.8

Gravity: 2.25 G

Time & Orbit

Eccentricity (e): 0.004

Orbit Range: 5.58 AU - 5.62 AU

Year: 4840 Days

Day: 9.3 Hours

Environment

Temp: -138 °C

Axial Tilt: 125.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (20)

Outer Limit: 54,908,851 km

• M1: 171,888 km (0.056 R)
• M2: 666,010 km (0.061 R)
• M3: 1,124,378 km (0.095 R)
• M4: 1,707,959 km (0.092 R)
• M5: 2,210,757 km (0.051 R)
• M6: 2,713,406 km (0.075 R)
• M7: 3,255,100 km (0.032 R)
• M8: 3,911,087 km (0.086 R)
• M9: 5,516,122 km (0.065 R)
• M10: 6,756,139 km (0.026 R)
• M11: 8,787,080 km (0.094 R)
• M12: 9,942,873 km (0.048 R)
• M13: 11,197,700 km (0.082 R)
• M14: 11,728,323 km (0.099 R)
• M15: 14,689,913 km (0.109 R)
• M16: 16,259,643 km (0.057 R)
• M17: 17,230,384 km (0.043 R)
• M18: 18,058,557 km (0.059 R)
• M19: 21,301,540 km (0.065 R)
• M20: 24,322,519 km (0.062 R)

Planet 7 - Gas Giant

Semi-Major Axis: 9.63 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 517.9

Radius: 9.9

Gravity: 5.28 G

Time & Orbit

Eccentricity (e): 0.18

Orbit Range: 7.9 AU - 11.36 AU

Year: 10915 Days

Day: 11.1 Hours

Environment

Temp: -183 °C

Axial Tilt: 41.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (24)

Outer Limit: 54,908,851 km

• M1: 131,197 km (0.064 R)
• M2: 465,399 km (0.101 R)
• M3: 870,809 km (0.03 R)
• M4: 1,890,169 km (0.049 R)
• M5: 2,241,425 km (0.1 R)
• M6: 3,742,939 km (0.11 R)
• M7: 4,825,279 km (0.094 R)
• M8: 5,261,058 km (0.089 R)
• M9: 6,319,762 km (0.099 R)
• M10: 7,153,321 km (0.066 R)
• M11: 12,339,880 km (0.099 R)
• M12: 13,276,213 km (0.096 R)
• M13: 13,884,926 km (0.044 R)
• M14: 16,095,085 km (0.111 R)
• M15: 18,380,492 km (0.051 R)
• M16: 20,071,846 km (0.069 R)
• M17: 23,321,111 km (0.051 R)
• M18: 27,098,457 km (0.098 R)
• M19: 28,576,784 km (0.052 R)
• M20: 31,052,628 km (0.074 R)
• M21: 37,499,399 km (0.106 R)
• M22: 41,740,947 km (0.113 R)
• M23: 43,843,396 km (0.096 R)
• M24: 45,602,817 km (0.068 R)

Planet 8 - Ice Giant

Semi-Major Axis: 15 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 591.5

Radius: 3.6

Gravity: 45.64 G

Time & Orbit

Eccentricity (e): 0.185

Orbit Range: 12.23 AU - 17.78 AU

Year: 21219 Days

Day: 24.2 Hours

Environment

Temp: -196 °C

Axial Tilt: 24.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 54,908,851 km

• M1: 45,627 km (0.05 R)
• M2: 521,648 km (0.103 R)
• M3: 825,182 km (0.12 R)
• M4: 961,316 km (0.101 R)
• M5: 1,920,238 km (0.119 R)
• M6: 2,376,811 km (0.108 R)
• M7: 3,922,456 km (0.117 R)
• M8: 4,048,866 km (0.118 R)
• M9: 4,210,881 km (0.119 R)
• M10: 4,444,702 km (0.097 R)
• M11: 4,865,671 km (0.093 R)
• M12: 5,011,678 km (0.094 R)
• M13: 5,351,116 km (0.118 R)
• M14: 6,288,047 km (0.082 R)
• M15: 6,863,251 km (0.117 R)
• M16: 7,140,306 km (0.118 R)
• M17: 9,070,568 km (0.058 R)
• M18: 9,631,111 km (0.107 R)
• M19: 17,651,950 km (0.035 R)
• M20: 18,969,758 km (0.102 R)
• M21: 19,331,934 km (0.037 R)
• M22: 19,698,748 km (0.083 R)
• M23: 20,163,699 km (0.054 R)
• M24: 20,922,908 km (0.097 R)
• M25: 22,497,874 km (0.118 R)
• M26: 25,223,099 km (0.109 R)
• M27: 25,992,630 km (0.082 R)
• M28: 28,043,318 km (0.081 R)
• M29: 33,241,993 km (0.114 R)
• M30: 34,568,029 km (0.048 R)
• M31: 36,205,228 km (0.115 R)
• M32: 39,780,617 km (0.079 R)
• M33: 48,459,837 km (0.116 R)
• M34: 54,410,541 km (0.096 R)
• M35: 54,774,961 km (0.089 R)
• M36: 55,508,739 km (0.091 R)
• M37: 59,662,174 km (0.105 R)
• M38: 68,793,329 km (0.11 R)

Planet 9 - Ice Giant

Semi-Major Axis: 19.28 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 107.7

Radius: 7.2

Gravity: 2.08 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 16.91 AU - 21.65 AU

Year: 30921 Days

Day: 20.4 Hours

Environment

Temp: -193 °C

Axial Tilt: 28.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 54,908,851 km

• M1: 89,609 km (0.057 R)
• M2: 966,851 km (0.061 R)
• M3: 3,291,602 km (0.078 R)
• M4: 3,677,564 km (0.03 R)
• M5: 5,425,466 km (0.079 R)
• M6: 5,672,751 km (0.093 R)
• M7: 8,437,021 km (0.041 R)
• M8: 10,082,298 km (0.087 R)
• M9: 20,465,587 km (0.109 R)
• M10: 24,439,954 km (0.116 R)
• M11: 26,607,627 km (0.11 R)
• M12: 32,234,302 km (0.115 R)
• M13: 34,594,059 km (0.04 R)
• M14: 37,574,796 km (0.111 R)
• M15: 37,830,758 km (0.117 R)
• M16: 40,857,422 km (0.12 R)
• M17: 43,195,637 km (0.112 R)

Kuiper Belt

Range: 30 - 57 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 393 - 11,964 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit