🌌 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: 0.52 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.37

Radius: 1.63

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.209

Orbit Range: 0.41 AU - 0.63 AU

Year: 246 Days

Day: 46.4 Hours

Environment

Temp: -116 °C

Axial Tilt: 34.3 °

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: 4.67

Radius: 1.85

Gravity: 1.36 G

Time & Orbit

Eccentricity (e): 0.027

Orbit Range: 0.6 AU - 0.64 AU

Year: 320 Days

Day: 17.4 Hours

Environment

Temp: -135 °C

Axial Tilt: 33.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.62 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.29

Radius: 1.39

Gravity: 1.19 G

Time & Orbit

Eccentricity (e): 0.242

Orbit Range: 0.47 AU - 0.77 AU

Year: 320 Days

Day: 24.5 Hours

Environment

Temp: -124 °C

Axial Tilt: 1.4 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 61,214,526 km

• M1: 465,698 km (0.071 R)

Planet 4 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 303.1

Radius: 9.1

Gravity: 3.66 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 0.61 AU - 0.83 AU

Year: 401 Days

Day: 12.7 Hours

Environment

Temp: -142 °C

Axial Tilt: 39.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (38)

Outer Limit: 61,214,526 km

• M1: 116,088 km (0.093 R)
• M2: 172,786 km (0.056 R)
• M3: 256,860 km (0.05 R)
• M4: 322,084 km (0.074 R)
• M5: 389,702 km (0.11 R)
• M6: 525,388 km (0.107 R)
• M7: 584,628 km (0.078 R)
• M8: 697,425 km (0.117 R)
• M9: 756,816 km (0.106 R)
• M10: 825,032 km (0.1 R)
• M11: 917,035 km (0.066 R)
• M12: 994,078 km (0.07 R)
• M13: 1,073,365 km (0.098 R)
• M14: 1,143,077 km (0.11 R)
• M15: 1,266,944 km (0.1 R)
• M16: 1,341,145 km (0.115 R)
• M17: 1,429,408 km (0.109 R)
• M18: 1,511,088 km (0.066 R)
• M19: 1,598,752 km (0.108 R)
• M20: 1,793,379 km (0.113 R)
• M21: 1,914,703 km (0.047 R)
• M22: 2,009,997 km (0.064 R)
• M23: 2,165,878 km (0.104 R)
• M24: 2,225,418 km (0.094 R)
• M25: 2,300,516 km (0.046 R)
• M26: 2,443,232 km (0.119 R)
• M27: 2,615,120 km (0.065 R)
• M28: 2,710,564 km (0.088 R)
• M29: 2,774,891 km (0.101 R)
• M30: 2,927,032 km (0.108 R)
• M31: 3,115,376 km (0.092 R)
• M32: 3,262,131 km (0.115 R)
• M33: 3,388,242 km (0.103 R)
• M34: 3,486,678 km (0.103 R)
• M35: 3,686,690 km (0.106 R)
• M36: 3,848,106 km (0.084 R)
• M37: 3,908,544 km (0.103 R)
• M38: 4,128,602 km (0.089 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.09 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 536.2

Radius: 9.4

Gravity: 6.07 G

Time & Orbit

Eccentricity (e): 0.05

Orbit Range: 1.04 AU - 1.14 AU

Year: 747 Days

Day: 6 Hours

Environment

Temp: -168 °C

Axial Tilt: 39.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (59)

Outer Limit: 61,214,526 km

• M1: 128,355 km (0.114 R)
• M2: 244,742 km (0.094 R)
• M3: 318,344 km (0.066 R)
• M4: 421,716 km (0.1 R)
• M5: 482,752 km (0.11 R)
• M6: 601,383 km (0.107 R)
• M7: 662,419 km (0.11 R)
• M8: 776,114 km (0.12 R)
• M9: 864,676 km (0.117 R)
• M10: 956,828 km (0.111 R)
• M11: 1,075,459 km (0.118 R)
• M12: 1,199,326 km (0.101 R)
• M13: 1,260,063 km (0.112 R)
• M14: 1,461,422 km (0.108 R)
• M15: 1,646,474 km (0.073 R)
• M16: 1,909,916 km (0.053 R)
• M17: 1,974,393 km (0.079 R)
• M18: 2,120,101 km (0.075 R)
• M19: 2,216,891 km (0.069 R)
• M20: 2,322,806 km (0.115 R)
• M21: 2,422,588 km (0.064 R)
• M22: 2,484,821 km (0.115 R)
• M23: 2,690,667 km (0.086 R)
• M24: 2,803,763 km (0.112 R)
• M25: 3,076,929 km (0.087 R)
• M26: 3,144,398 km (0.104 R)
• M27: 3,350,095 km (0.11 R)
• M28: 3,410,831 km (0.097 R)
• M29: 3,568,956 km (0.04 R)
• M30: 3,993,216 km (0.076 R)
• M31: 4,094,943 km (0.045 R)
• M32: 4,187,992 km (0.107 R)
• M33: 4,253,666 km (0.072 R)
• M34: 4,338,637 km (0.074 R)
• M35: 4,405,059 km (0.104 R)
• M36: 4,606,418 km (0.048 R)
• M37: 4,683,909 km (0.062 R)
• M38: 4,840,239 km (0.082 R)
• M39: 4,919,077 km (0.079 R)
• M40: 5,018,261 km (0.104 R)
• M41: 5,168,158 km (0.107 R)
• M42: 5,329,873 km (0.115 R)
• M43: 5,390,909 km (0.089 R)
• M44: 5,524,051 km (0.109 R)
• M45: 5,585,835 km (0.111 R)
• M46: 5,678,885 km (0.07 R)
• M47: 5,751,739 km (0.068 R)
• M48: 5,982,568 km (0.109 R)
• M49: 6,067,241 km (0.054 R)
• M50: 6,173,605 km (0.113 R)
• M51: 6,269,946 km (0.097 R)
• M52: 6,366,885 km (0.088 R)
• M53: 6,453,353 km (0.088 R)
• M54: 6,529,349 km (0.071 R)
• M55: 6,594,723 km (0.084 R)
• M56: 6,825,403 km (0.1 R)
• M57: 7,047,556 km (0.047 R)
• M58: 7,137,015 km (0.05 R)
• M59: 7,682,150 km (0.076 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.47 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 376.1

Radius: 9.1

Gravity: 4.54 G

Time & Orbit

Eccentricity (e): 0.173

Orbit Range: 1.22 AU - 1.72 AU

Year: 1169 Days

Day: 12.1 Hours

Environment

Temp: -185 °C

Axial Tilt: 33.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 61,214,526 km

• M1: 114,742 km (0.079 R)
• M2: 173,833 km (0.085 R)
• M3: 277,504 km (0.06 R)
• M4: 371,900 km (0.088 R)
• M5: 465,399 km (0.088 R)
• M6: 734,526 km (0.119 R)
• M7: 948,750 km (0.097 R)
• M8: 1,169,407 km (0.079 R)
• M9: 1,377,946 km (0.072 R)
• M10: 1,435,691 km (0.103 R)
• M11: 1,553,574 km (0.104 R)
• M12: 1,621,491 km (0.119 R)
• M13: 1,767,948 km (0.072 R)
• M14: 1,918,892 km (0.118 R)
• M15: 1,975,739 km (0.117 R)
• M16: 2,166,177 km (0.079 R)
• M17: 2,250,850 km (0.047 R)
• M18: 2,458,791 km (0.077 R)
• M19: 2,645,788 km (0.073 R)
• M20: 2,709,217 km (0.12 R)
• M21: 2,800,771 km (0.073 R)
• M22: 2,968,171 km (0.071 R)
• M23: 3,177,309 km (0.097 R)
• M24: 3,322,569 km (0.087 R)
• M25: 3,420,705 km (0.078 R)
• M26: 3,489,969 km (0.112 R)
• M27: 3,589,900 km (0.095 R)
• M28: 3,650,188 km (0.117 R)
• M29: 3,926,047 km (0.079 R)
• M30: 4,103,170 km (0.054 R)
• M31: 4,229,880 km (0.105 R)
• M32: 4,347,015 km (0.086 R)
• M33: 4,411,492 km (0.049 R)
• M34: 4,476,267 km (0.095 R)
• M35: 4,650,399 km (0.104 R)
• M36: 4,849,215 km (0.073 R)
• M37: 5,039,354 km (0.088 R)
• M38: 5,601,543 km (0.086 R)
• M39: 5,742,314 km (0.077 R)
• M40: 5,801,256 km (0.107 R)
• M41: 5,967,459 km (0.098 R)
• M42: 6,051,234 km (0.078 R)
• M43: 6,268,300 km (0.051 R)
• M44: 6,390,073 km (0.055 R)
• M45: 6,451,109 km (0.1 R)
• M46: 6,537,128 km (0.116 R)
• M47: 6,635,862 km (0.104 R)
• M48: 7,010,455 km (0.05 R)
• M49: 7,073,436 km (0.061 R)
• M50: 7,136,716 km (0.101 R)
• M51: 7,213,011 km (0.06 R)
• M52: 7,456,107 km (0.106 R)
• M53: 7,976,708 km (0.079 R)
• M54: 8,281,439 km (0.066 R)
• M55: 8,374,938 km (0.115 R)
• M56: 8,684,755 km (0.103 R)
• M57: 8,793,363 km (0.112 R)
• M58: 9,121,880 km (0.117 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.28 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 608.5

Radius: 12.4

Gravity: 3.96 G

Time & Orbit

Eccentricity (e): 0.086

Orbit Range: 2.08 AU - 2.48 AU

Year: 2258 Days

Day: 9.4 Hours

Environment

Temp: -201 °C

Axial Tilt: 34.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 61,214,526 km

• M1: 168,597 km (0.102 R)
• M2: 260,300 km (0.035 R)
• M3: 366,664 km (0.036 R)
• M4: 481,406 km (0.102 R)
• M5: 611,406 km (0.094 R)
• M6: 697,724 km (0.046 R)
• M7: 806,033 km (0.119 R)
• M8: 957,127 km (0.048 R)
• M9: 1,098,946 km (0.105 R)
• M10: 1,258,417 km (0.109 R)
• M11: 1,372,710 km (0.093 R)
• M12: 1,590,076 km (0.077 R)
• M13: 1,985,613 km (0.096 R)
• M14: 2,609,585 km (0.049 R)
• M15: 2,867,492 km (0.076 R)
• M16: 3,048,805 km (0.086 R)
• M17: 3,147,988 km (0.111 R)
• M18: 3,277,241 km (0.095 R)
• M19: 3,541,131 km (0.088 R)
• M20: 3,630,591 km (0.082 R)
• M21: 3,934,574 km (0.065 R)
• M22: 4,074,148 km (0.053 R)
• M23: 4,183,804 km (0.049 R)
• M24: 4,262,791 km (0.083 R)
• M25: 4,454,277 km (0.116 R)
• M26: 4,665,060 km (0.103 R)
• M27: 5,130,309 km (0.081 R)
• M28: 5,489,195 km (0.058 R)
• M29: 5,645,524 km (0.114 R)
• M30: 5,785,698 km (0.109 R)
• M31: 5,927,068 km (0.114 R)
• M32: 6,123,340 km (0.111 R)
• M33: 6,213,248 km (0.093 R)
• M34: 6,394,561 km (0.041 R)
• M35: 6,855,322 km (0.09 R)
• M36: 7,499,192 km (0.066 R)
• M37: 7,595,533 km (0.08 R)
• M38: 7,692,323 km (0.114 R)
• M39: 8,142,762 km (0.12 R)
• M40: 8,301,485 km (0.055 R)
• M41: 8,865,170 km (0.034 R)
• M42: 9,234,078 km (0.066 R)
• M43: 9,587,129 km (0.088 R)
• M44: 9,965,761 km (0.026 R)
• M45: 10,199,583 km (0.108 R)
• M46: 10,435,349 km (0.032 R)
• M47: 10,824,902 km (0.102 R)
• M48: 11,263,373 km (0.113 R)
• M49: 11,351,786 km (0.097 R)
• M50: 11,529,209 km (0.11 R)
• M51: 11,685,389 km (0.08 R)
• M52: 11,887,047 km (0.098 R)
• M53: 12,362,170 km (0.083 R)
• M54: 12,499,201 km (0.081 R)
• M55: 12,659,570 km (0.089 R)
• M56: 12,751,423 km (0.061 R)
• M57: 13,051,816 km (0.116 R)
• M58: 13,214,578 km (0.09 R)
• M59: 13,495,074 km (0.049 R)
• M60: 13,589,022 km (0.119 R)
• M61: 13,683,268 km (0.086 R)
• M62: 13,943,270 km (0.078 R)
• M63: 14,564,549 km (0.079 R)
• M64: 14,661,040 km (0.1 R)
• M65: 15,366,244 km (0.104 R)
• M66: 16,057,536 km (0.083 R)
• M67: 16,231,967 km (0.091 R)
• M68: 16,708,736 km (0.093 R)
• M69: 16,834,847 km (0.081 R)
• M70: 17,037,552 km (0.107 R)

Planet 8 - Gas Giant

Semi-Major Axis: 3.54 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 363.8

Radius: 13.3

Gravity: 2.06 G

Time & Orbit

Eccentricity (e): 0.192

Orbit Range: 2.86 AU - 4.22 AU

Year: 4369 Days

Day: 7.3 Hours

Environment

Temp: -209 °C

Axial Tilt: 20.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (78)

Outer Limit: 61,214,526 km

• M1: 173,234 km (0.066 R)
• M2: 258,356 km (0.113 R)
• M3: 413,489 km (0.047 R)
• M4: 630,256 km (0.08 R)
• M5: 974,780 km (0.062 R)
• M6: 1,134,101 km (0.114 R)
• M7: 1,229,395 km (0.056 R)
• M8: 1,493,136 km (0.083 R)
• M9: 1,625,381 km (0.032 R)
• M10: 2,470,310 km (0.04 R)
• M11: 2,660,598 km (0.114 R)
• M12: 3,243,431 km (0.034 R)
• M13: 3,382,258 km (0.046 R)
• M14: 3,505,527 km (0.044 R)
• M15: 3,612,190 km (0.1 R)
• M16: 3,720,200 km (0.102 R)
• M17: 4,106,462 km (0.112 R)
• M18: 4,486,440 km (0.051 R)
• M19: 4,602,678 km (0.081 R)
• M20: 4,700,365 km (0.098 R)
• M21: 5,017,513 km (0.092 R)
• M22: 5,118,192 km (0.096 R)
• M23: 5,341,841 km (0.09 R)
• M24: 5,548,136 km (0.111 R)
• M25: 5,778,068 km (0.042 R)
• M26: 5,947,263 km (0.111 R)
• M27: 6,139,646 km (0.062 R)
• M28: 6,269,048 km (0.049 R)
• M29: 6,355,815 km (0.086 R)
• M30: 6,574,527 km (0.072 R)
• M31: 6,907,233 km (0.098 R)
• M32: 7,222,884 km (0.099 R)
• M33: 7,635,775 km (0.054 R)
• M34: 7,821,725 km (0.117 R)
• M35: 8,174,626 km (0.082 R)
• M36: 8,484,593 km (0.113 R)
• M37: 8,847,068 km (0.042 R)
• M38: 9,018,059 km (0.096 R)
• M39: 9,140,879 km (0.103 R)
• M40: 9,990,595 km (0.106 R)
• M41: 10,476,488 km (0.11 R)
• M42: 10,631,472 km (0.047 R)
• M43: 10,787,353 km (0.039 R)
• M44: 10,917,653 km (0.047 R)
• M45: 11,127,538 km (0.091 R)
• M46: 11,711,419 km (0.113 R)
• M47: 11,899,314 km (0.046 R)
• M48: 12,007,024 km (0.107 R)
• M49: 12,142,261 km (0.096 R)
• M50: 12,414,230 km (0.104 R)
• M51: 13,242,404 km (0.108 R)
• M52: 13,410,103 km (0.091 R)
• M53: 14,374,261 km (0.108 R)
• M54: 14,575,470 km (0.063 R)
• M55: 14,922,687 km (0.11 R)
• M56: 15,068,246 km (0.066 R)
• M57: 15,155,760 km (0.067 R)
• M58: 15,389,881 km (0.1 R)
• M59: 15,566,406 km (0.088 R)
• M60: 15,951,023 km (0.093 R)
• M61: 16,729,679 km (0.079 R)
• M62: 16,941,510 km (0.08 R)
• M63: 17,367,714 km (0.065 R)
• M64: 17,551,570 km (0.093 R)
• M65: 18,106,728 km (0.074 R)
• M66: 18,981,875 km (0.112 R)
• M67: 19,139,552 km (0.088 R)
• M68: 19,265,962 km (0.114 R)
• M69: 19,488,115 km (0.099 R)
• M70: 19,966,678 km (0.051 R)
• M71: 20,288,014 km (0.097 R)
• M72: 20,578,683 km (0.08 R)
• M73: 20,805,623 km (0.102 R)
• M74: 20,903,161 km (0.053 R)
• M75: 21,033,461 km (0.069 R)
• M76: 21,458,767 km (0.095 R)
• M77: 21,953,039 km (0.056 R)
• M78: 22,251,486 km (0.07 R)

Planet 9 - Ice Giant

Semi-Major Axis: 9.62 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 372.4

Radius: 3.8

Gravity: 25.79 G

Time & Orbit

Eccentricity (e): 0.076

Orbit Range: 8.89 AU - 10.35 AU

Year: 19574 Days

Day: 15.8 Hours

Environment

Temp: -222 °C

Axial Tilt: 29.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 61,214,526 km

• M1: 49,218 km (0.102 R)
• M2: 159,621 km (0.08 R)
• M3: 207,492 km (0.062 R)
• M4: 233,373 km (0.117 R)
• M5: 260,599 km (0.12 R)
• M6: 349,311 km (0.092 R)
• M7: 901,626 km (0.028 R)
• M8: 1,698,833 km (0.093 R)
• M9: 2,039,917 km (0.042 R)
• M10: 2,218,237 km (0.109 R)
• M11: 2,248,456 km (0.092 R)
• M12: 2,340,010 km (0.094 R)
• M13: 2,432,611 km (0.114 R)
• M14: 2,463,877 km (0.111 R)
• M15: 2,589,988 km (0.091 R)
• M16: 3,285,768 km (0.085 R)
• M17: 3,320,325 km (0.088 R)
• M18: 3,998,751 km (0.099 R)
• M19: 4,035,552 km (0.079 R)
• M20: 5,807,988 km (0.084 R)
• M21: 6,618,958 km (0.106 R)
• M22: 6,706,473 km (0.116 R)
• M23: 7,239,041 km (0.073 R)
• M24: 8,344,270 km (0.116 R)
• M25: 8,486,089 km (0.082 R)
• M26: 8,533,661 km (0.119 R)
• M27: 9,061,442 km (0.078 R)
• M28: 9,847,878 km (0.079 R)
• M29: 10,198,685 km (0.045 R)
• M30: 10,707,168 km (0.036 R)
• M31: 11,380,209 km (0.056 R)
• M32: 11,537,586 km (0.091 R)
• M33: 12,173,826 km (0.114 R)
• M34: 13,149,503 km (0.072 R)
• M35: 13,591,116 km (0.102 R)
• M36: 14,944,827 km (0.101 R)
• M37: 15,463,483 km (0.097 R)
• M38: 15,870,988 km (0.095 R)
• M39: 17,114,445 km (0.083 R)
• M40: 18,327,385 km (0.099 R)
• M41: 18,634,958 km (0.083 R)
• M42: 18,882,243 km (0.096 R)
• M43: 19,630,681 km (0.093 R)
• M44: 19,945,286 km (0.046 R)
• M45: 21,285,084 km (0.115 R)
• M46: 23,116,013 km (0.113 R)
• M47: 23,514,990 km (0.088 R)
• M48: 23,581,561 km (0.098 R)
• M49: 24,117,570 km (0.026 R)
• M50: 24,454,465 km (0.092 R)
• M51: 26,370,065 km (0.119 R)
• M52: 26,856,408 km (0.066 R)
• M53: 27,556,377 km (0.03 R)
• M54: 27,767,459 km (0.035 R)
• M55: 28,617,474 km (0.108 R)
• M56: 30,633,754 km (0.081 R)
• M57: 31,218,233 km (0.103 R)
• M58: 31,806,302 km (0.117 R)
• M59: 32,546,662 km (0.096 R)
• M60: 36,101,108 km (0.116 R)
• M61: 36,641,006 km (0.103 R)
• M62: 37,261,239 km (0.102 R)
• M63: 37,339,030 km (0.1 R)
• M64: 37,728,583 km (0.103 R)
• M65: 37,806,673 km (0.096 R)
• M66: 39,935,600 km (0.058 R)
• M67: 40,174,508 km (0.048 R)
• M68: 40,254,244 km (0.12 R)
• M69: 41,054,592 km (0.113 R)
• M70: 41,941,109 km (0.041 R)
• M71: 42,184,056 km (0.093 R)
• M72: 42,752,528 km (0.08 R)
• M73: 43,323,543 km (0.092 R)
• M74: 43,405,373 km (0.037 R)
• M75: 43,732,993 km (0.087 R)
• M76: 43,814,972 km (0.038 R)
• M77: 44,143,639 km (0.061 R)
• M78: 44,638,209 km (0.094 R)
• M79: 48,235,739 km (0.106 R)
• M80: 49,683,398 km (0.084 R)
• M81: 49,854,687 km (0.092 R)
• M82: 50,111,846 km (0.089 R)
• M83: 51,491,437 km (0.049 R)
• M84: 52,098,805 km (0.057 R)
• M85: 52,185,721 km (0.074 R)
• M86: 53,058,176 km (0.098 R)
• M87: 53,935,268 km (0.115 R)
• M88: 55,526,242 km (0.11 R)
• M89: 56,149,167 km (0.116 R)
• M90: 57,042,865 km (0.092 R)
• M91: 57,132,474 km (0.12 R)
• M92: 57,401,750 km (0.055 R)
• M93: 58,754,115 km (0.111 R)
• M94: 59,934,592 km (0.072 R)
• M95: 60,481,970 km (0.077 R)

Kuiper Belt

Range: 30 - 54 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 267 - 19,185 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit