🌌 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: 0.61 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.64

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.081

Orbit Range: 0.56 AU - 0.66 AU

Year: 308 Days

Day: 35.3 Hours

Environment

Temp: -138 °C

Axial Tilt: 38.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.91 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 495.8

Radius: 12.5

Gravity: 3.17 G

Time & Orbit

Eccentricity (e): 0.13

Orbit Range: 0.79 AU - 1.03 AU

Year: 561 Days

Day: 9.9 Hours

Environment

Temp: -164 °C

Axial Tilt: 48 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (10)

Outer Limit: 77,135,611 km

• M1: 155,432 km (0.082 R)
• M2: 546,032 km (0.088 R)
• M3: 1,112,709 km (0.071 R)
• M4: 1,544,000 km (0.077 R)
• M5: 1,947,166 km (0.053 R)
• M6: 2,687,227 km (0.071 R)
• M7: 3,186,435 km (0.047 R)
• M8: 3,696,115 km (0.063 R)
• M9: 4,927,006 km (0.114 R)
• M10: 5,835,963 km (0.097 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 680.3

Radius: 11.8

Gravity: 4.89 G

Time & Orbit

Eccentricity (e): 0.075

Orbit Range: 1.43 AU - 1.67 AU

Year: 1246 Days

Day: 7.9 Hours

Environment

Temp: -177 °C

Axial Tilt: 37.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 77,135,611 km

• M1: 146,756 km (0.076 R)
• M2: 577,897 km (0.062 R)
• M3: 1,013,526 km (0.105 R)
• M4: 1,401,582 km (0.089 R)
• M5: 1,931,009 km (0.089 R)
• M6: 2,654,016 km (0.113 R)
• M7: 3,206,780 km (0.062 R)
• M8: 3,706,586 km (0.12 R)
• M9: 4,364,219 km (0.081 R)
• M10: 4,749,583 km (0.083 R)
• M11: 6,134,709 km (0.117 R)
• M12: 6,667,577 km (0.116 R)
• M13: 7,105,899 km (0.116 R)
• M14: 8,013,659 km (0.114 R)
• M15: 8,566,124 km (0.09 R)
• M16: 8,967,944 km (0.085 R)
• M17: 9,778,465 km (0.076 R)
• M18: 10,377,754 km (0.082 R)

Planet 4 - Gas Giant

Semi-Major Axis: 2.62 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 500.2

Radius: 10.3

Gravity: 4.71 G

Time & Orbit

Eccentricity (e): 0.149

Orbit Range: 2.23 AU - 3.01 AU

Year: 2738 Days

Day: 6.2 Hours

Environment

Temp: -208 °C

Axial Tilt: 6.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 77,135,611 km

• M1: 128,654 km (0.118 R)
• M2: 483,800 km (0.11 R)
• M3: 807,529 km (0.105 R)
• M4: 1,135,597 km (0.108 R)
• M5: 1,774,979 km (0.052 R)
• M6: 3,134,973 km (0.09 R)
• M7: 3,492,661 km (0.09 R)
• M8: 4,477,165 km (0.112 R)
• M9: 5,137,340 km (0.073 R)
• M10: 5,563,694 km (0.032 R)
• M11: 6,845,748 km (0.103 R)
• M12: 7,304,266 km (0.09 R)
• M13: 7,783,128 km (0.089 R)
• M14: 8,124,511 km (0.082 R)
• M15: 8,540,692 km (0.104 R)
• M16: 9,450,995 km (0.084 R)
• M17: 11,305,709 km (0.055 R)
• M18: 11,744,181 km (0.106 R)
• M19: 12,194,022 km (0.091 R)
• M20: 12,655,381 km (0.099 R)
• M21: 16,879,128 km (0.104 R)

Planet 5 - Gas Giant

Semi-Major Axis: 4.27 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 103.5

Radius: 14.9

Gravity: 0.47 G

Time & Orbit

Eccentricity (e): 0.021

Orbit Range: 4.18 AU - 4.36 AU

Year: 5697 Days

Day: 14.2 Hours

Environment

Temp: -218 °C

Axial Tilt: 24.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (15)

Outer Limit: 77,135,611 km

• M1: 185,352 km (0.097 R)
• M2: 733,030 km (0.113 R)
• M3: 1,296,266 km (0.118 R)
• M4: 3,283,224 km (0.069 R)
• M5: 3,823,572 km (0.067 R)
• M6: 4,464,300 km (0.068 R)
• M7: 5,336,605 km (0.108 R)
• M8: 7,538,237 km (0.106 R)
• M9: 8,776,907 km (0.11 R)
• M10: 9,827,084 km (0.102 R)
• M11: 10,585,097 km (0.077 R)
• M12: 11,342,959 km (0.076 R)
• M13: 12,382,216 km (0.025 R)
• M14: 13,924,719 km (0.08 R)
• M15: 16,574,247 km (0.111 R)

Planet 6 - Gas Giant

Semi-Major Axis: 4.42 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 418.2

Radius: 14.3

Gravity: 2.05 G

Time & Orbit

Eccentricity (e): 0.193

Orbit Range: 3.57 AU - 5.27 AU

Year: 6000 Days

Day: 13.8 Hours

Environment

Temp: -223 °C

Axial Tilt: 37.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 77,135,611 km

• M1: 177,872 km (0.117 R)
• M2: 1,001,558 km (0.092 R)
• M3: 1,474,885 km (0.071 R)
• M4: 1,990,250 km (0.06 R)
• M5: 3,643,606 km (0.038 R)
• M6: 4,385,611 km (0.12 R)
• M7: 4,908,905 km (0.097 R)
• M8: 6,264,261 km (0.049 R)
• M9: 7,162,896 km (0.114 R)
• M10: 8,632,246 km (0.093 R)
• M11: 10,080,952 km (0.104 R)
• M12: 10,774,637 km (0.096 R)
• M13: 11,453,811 km (0.053 R)
• M14: 13,925,767 km (0.09 R)
• M15: 16,497,504 km (0.1 R)
• M16: 19,437,251 km (0.092 R)
• M17: 20,308,509 km (0.118 R)
• M18: 21,699,470 km (0.118 R)
• M19: 24,439,206 km (0.099 R)
• M20: 25,772,123 km (0.078 R)
• M21: 26,497,224 km (0.116 R)

Planet 7 - Gas Giant

Semi-Major Axis: 4.85 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 17.1

Radius: 8.9

Gravity: 0.22 G

Time & Orbit

Eccentricity (e): 0.214

Orbit Range: 3.81 AU - 5.89 AU

Year: 6896 Days

Day: 10.5 Hours

Environment

Temp: -218 °C

Axial Tilt: 19.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (9)

Outer Limit: 77,135,611 km

• M1: 115,639 km (0.096 R)
• M2: 414,835 km (0.088 R)
• M3: 906,862 km (0.071 R)
• M4: 1,597,855 km (0.077 R)
• M5: 5,528,988 km (0.041 R)
• M6: 7,287,810 km (0.11 R)
• M7: 8,213,970 km (0.062 R)
• M8: 10,360,999 km (0.12 R)
• M9: 10,870,230 km (0.116 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.1 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 664.6

Radius: 3.6

Gravity: 51.28 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 7.75 AU - 12.45 AU

Year: 20725 Days

Day: 24.6 Hours

Environment

Temp: -232 °C

Axial Tilt: 10.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 77,135,611 km

• M1: 92,152 km (0.081 R)
• M2: 214,075 km (0.097 R)
• M3: 436,975 km (0.065 R)
• M4: 590,463 km (0.071 R)
• M5: 1,647,970 km (0.09 R)
• M6: 3,321,821 km (0.064 R)
• M7: 6,884,045 km (0.077 R)
• M8: 7,211,066 km (0.111 R)
• M9: 7,451,021 km (0.1 R)
• M10: 9,681,077 km (0.118 R)
• M11: 18,240,468 km (0.105 R)
• M12: 19,505,318 km (0.065 R)
• M13: 21,708,147 km (0.119 R)
• M14: 24,499,045 km (0.062 R)
• M15: 32,437,605 km (0.083 R)
• M16: 34,288,131 km (0.1 R)
• M17: 37,479,203 km (0.045 R)
• M18: 42,550,122 km (0.049 R)
• M19: 48,228,558 km (0.057 R)
• M20: 50,285,978 km (0.113 R)
• M21: 52,044,501 km (0.074 R)
• M22: 53,480,640 km (0.105 R)
• M23: 55,497,968 km (0.067 R)
• M24: 56,056,865 km (0.112 R)
• M25: 59,101,032 km (0.113 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: 248 - 15,962 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit