🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.39 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.77 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 17.1

Radius: 9.8

Gravity: 0.18 G

Time & Orbit

Eccentricity (e): 0.143

Orbit Range: 0.66 AU - 0.88 AU

Year: 466 Days

Day: 6.8 Hours

Environment

Temp: -171 °C

Axial Tilt: 36.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (17)

Outer Limit: 26,570,942 km

• M1: 123,867 km (0.053 R)
• M2: 193,131 km (0.091 R)
• M3: 309,817 km (0.089 R)
• M4: 382,223 km (0.106 R)
• M5: 475,422 km (0.119 R)
• M6: 559,945 km (0.103 R)
• M7: 624,571 km (0.097 R)
• M8: 782,546 km (0.068 R)
• M9: 901,028 km (0.069 R)
• M10: 1,105,079 km (0.104 R)
• M11: 1,175,839 km (0.062 R)
• M12: 1,237,025 km (0.107 R)
• M13: 1,306,289 km (0.115 R)
• M14: 1,367,624 km (0.094 R)
• M15: 1,606,232 km (0.117 R)
• M16: 1,669,961 km (0.096 R)
• M17: 1,767,050 km (0.105 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.99 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 659.8

Radius: 12.5

Gravity: 4.22 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 0.93 AU - 1.05 AU

Year: 680 Days

Day: 11.1 Hours

Environment

Temp: -180 °C

Axial Tilt: 33.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (47)

Outer Limit: 26,570,942 km

• M1: 292,464 km (0.101 R)
• M2: 441,314 km (0.102 R)
• M3: 530,474 km (0.064 R)
• M4: 736,022 km (0.058 R)
• M5: 888,761 km (0.064 R)
• M6: 1,024,895 km (0.101 R)
• M7: 1,133,353 km (0.071 R)
• M8: 1,270,236 km (0.117 R)
• M9: 1,387,819 km (0.069 R)
• M10: 1,483,263 km (0.065 R)
• M11: 1,594,414 km (0.052 R)
• M12: 1,708,408 km (0.092 R)
• M13: 1,818,213 km (0.106 R)
• M14: 1,973,495 km (0.117 R)
• M15: 2,096,465 km (0.089 R)
• M16: 2,252,046 km (0.026 R)
• M17: 2,342,852 km (0.117 R)
• M18: 2,614,522 km (0.089 R)
• M19: 2,905,041 km (0.087 R)
• M20: 2,995,847 km (0.082 R)
• M21: 3,087,700 km (0.081 R)
• M22: 3,265,722 km (0.069 R)
• M23: 3,464,687 km (0.091 R)
• M24: 3,676,667 km (0.051 R)
• M25: 3,757,151 km (0.104 R)
• M26: 3,938,463 km (0.049 R)
• M27: 4,104,218 km (0.09 R)
• M28: 4,262,791 km (0.04 R)
• M29: 4,366,463 km (0.073 R)
• M30: 4,471,181 km (0.098 R)
• M31: 4,595,796 km (0.079 R)
• M32: 4,731,481 km (0.098 R)
• M33: 4,878,237 km (0.116 R)
• M34: 5,026,638 km (0.055 R)
• M35: 5,297,560 km (0.077 R)
• M36: 5,378,642 km (0.047 R)
• M37: 5,470,495 km (0.065 R)
• M38: 5,604,086 km (0.11 R)
• M39: 5,770,139 km (0.094 R)
• M40: 5,853,615 km (0.094 R)
• M41: 6,160,141 km (0.102 R)
• M42: 6,256,333 km (0.102 R)
• M43: 6,406,978 km (0.057 R)
• M44: 6,855,023 km (0.107 R)
• M45: 6,988,165 km (0.113 R)
• M46: 7,404,047 km (0.105 R)
• M47: 7,666,592 km (0.071 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.38 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 161.1

Radius: 12.3

Gravity: 1.06 G

Time & Orbit

Eccentricity (e): 0.187

Orbit Range: 1.12 AU - 1.64 AU

Year: 1119 Days

Day: 9.2 Hours

Environment

Temp: -184 °C

Axial Tilt: 20.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 26,570,942 km

• M1: 153,188 km (0.074 R)
• M2: 266,883 km (0.063 R)
• M3: 453,431 km (0.079 R)
• M4: 570,865 km (0.12 R)
• M5: 670,198 km (0.057 R)
• M6: 749,336 km (0.057 R)
• M7: 827,276 km (0.062 R)
• M8: 927,956 km (0.09 R)
• M9: 1,196,633 km (0.079 R)
• M10: 1,284,447 km (0.09 R)
• M11: 1,526,048 km (0.117 R)
• M12: 1,852,321 km (0.041 R)
• M13: 1,935,946 km (0.107 R)
• M14: 2,020,768 km (0.09 R)
• M15: 2,120,251 km (0.071 R)
• M16: 2,269,250 km (0.057 R)
• M17: 2,366,040 km (0.106 R)
• M18: 2,485,419 km (0.114 R)
• M19: 2,599,562 km (0.07 R)
• M20: 2,826,053 km (0.112 R)
• M21: 2,990,761 km (0.099 R)
• M22: 3,074,236 km (0.081 R)
• M23: 3,158,609 km (0.062 R)
• M24: 3,306,263 km (0.094 R)
• M25: 3,552,052 km (0.079 R)
• M26: 3,853,492 km (0.108 R)
• M27: 3,961,352 km (0.08 R)
• M28: 4,154,782 km (0.084 R)
• M29: 4,308,419 km (0.116 R)
• M30: 4,429,144 km (0.11 R)
• M31: 4,833,956 km (0.084 R)
• M32: 4,977,720 km (0.08 R)
• M33: 5,077,352 km (0.087 R)
• M34: 5,352,313 km (0.073 R)
• M35: 5,557,262 km (0.061 R)
• M36: 5,688,908 km (0.083 R)
• M37: 5,802,752 km (0.12 R)
• M38: 5,907,620 km (0.106 R)
• M39: 5,993,938 km (0.056 R)
• M40: 6,138,749 km (0.105 R)
• M41: 6,275,032 km (0.068 R)
• M42: 6,412,363 km (0.07 R)
• M43: 6,560,615 km (0.098 R)
• M44: 6,820,167 km (0.114 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.55 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 151.1

Radius: 15

Gravity: 0.67 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 1.22 AU - 1.88 AU

Year: 1332 Days

Day: 5.7 Hours

Environment

Temp: -196 °C

Axial Tilt: 109.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (36)

Outer Limit: 26,570,942 km

• M1: 208,988 km (0.073 R)
• M2: 388,805 km (0.042 R)
• M3: 485,146 km (0.093 R)
• M4: 768,035 km (0.049 R)
• M5: 905,666 km (0.097 R)
• M6: 1,004,550 km (0.103 R)
• M7: 1,135,149 km (0.102 R)
• M8: 1,319,304 km (0.055 R)
• M9: 1,679,386 km (0.107 R)
• M10: 1,811,181 km (0.07 R)
• M11: 1,939,686 km (0.087 R)
• M12: 2,120,699 km (0.061 R)
• M13: 2,263,865 km (0.082 R)
• M14: 2,358,859 km (0.08 R)
• M15: 2,674,960 km (0.114 R)
• M16: 2,838,320 km (0.108 R)
• M17: 3,029,207 km (0.038 R)
• M18: 3,166,987 km (0.07 R)
• M19: 3,348,599 km (0.1 R)
• M20: 3,662,006 km (0.092 R)
• M21: 3,967,336 km (0.065 R)
• M22: 4,109,902 km (0.105 R)
• M23: 4,208,786 km (0.119 R)
• M24: 4,445,899 km (0.096 R)
• M25: 4,556,901 km (0.119 R)
• M26: 4,904,865 km (0.112 R)
• M27: 5,164,418 km (0.095 R)
• M28: 5,310,575 km (0.12 R)
• M29: 5,557,262 km (0.093 R)
• M30: 5,697,136 km (0.108 R)
• M31: 6,000,819 km (0.111 R)
• M32: 6,216,540 km (0.081 R)
• M33: 6,382,743 km (0.077 R)
• M34: 6,550,292 km (0.079 R)
• M35: 6,783,216 km (0.12 R)
• M36: 6,997,440 km (0.12 R)

Planet 5 - Gas Giant

Semi-Major Axis: 2.45 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 768.9

Radius: 10.9

Gravity: 6.47 G

Time & Orbit

Eccentricity (e): 0.23

Orbit Range: 1.89 AU - 3.01 AU

Year: 2647 Days

Day: 12.5 Hours

Environment

Temp: -209 °C

Axial Tilt: 4.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (76)

Outer Limit: 26,570,942 km

• M1: 280,795 km (0.12 R)
• M2: 428,000 km (0.109 R)
• M3: 546,182 km (0.103 R)
• M4: 869,762 km (0.116 R)
• M5: 941,569 km (0.104 R)
• M6: 1,215,782 km (0.1 R)
• M7: 1,380,489 km (0.05 R)
• M8: 1,490,444 km (0.084 R)
• M9: 1,603,540 km (0.076 R)
• M10: 1,693,597 km (0.088 R)
• M11: 1,811,780 km (0.108 R)
• M12: 2,070,883 km (0.1 R)
• M13: 2,240,677 km (0.079 R)
• M14: 2,385,936 km (0.114 R)
• M15: 2,700,990 km (0.12 R)
• M16: 2,809,149 km (0.076 R)
• M17: 2,950,220 km (0.108 R)
• M18: 3,029,656 km (0.103 R)
• M19: 3,174,467 km (0.113 R)
• M20: 3,371,188 km (0.103 R)
• M21: 3,521,384 km (0.115 R)
• M22: 4,003,089 km (0.109 R)
• M23: 4,180,213 km (0.115 R)
• M24: 4,269,673 km (0.117 R)
• M25: 4,450,686 km (0.057 R)
• M26: 4,708,443 km (0.085 R)
• M27: 5,161,875 km (0.098 R)
• M28: 5,277,364 km (0.055 R)
• M29: 5,432,796 km (0.116 R)
• M30: 5,569,978 km (0.119 R)
• M31: 5,748,149 km (0.1 R)
• M32: 5,968,506 km (0.075 R)
• M33: 6,110,175 km (0.118 R)
• M34: 6,253,041 km (0.114 R)
• M35: 6,667,278 km (0.1 R)
• M36: 7,069,098 km (0.062 R)
• M37: 7,240,537 km (0.061 R)
• M38: 7,985,086 km (0.106 R)
• M39: 8,074,246 km (0.083 R)
• M40: 8,163,705 km (0.055 R)
• M41: 8,276,203 km (0.049 R)
• M42: 8,389,000 km (0.114 R)
• M43: 8,479,806 km (0.108 R)
• M44: 8,662,166 km (0.076 R)
• M45: 8,753,869 km (0.089 R)
• M46: 8,845,872 km (0.114 R)
• M47: 9,522,503 km (0.114 R)
• M48: 9,927,016 km (0.112 R)
• M49: 10,047,143 km (0.051 R)
• M50: 10,312,828 km (0.095 R)
• M51: 10,532,139 km (0.08 R)
• M52: 11,273,995 km (0.075 R)
• M53: 11,499,738 km (0.066 R)
• M54: 11,752,558 km (0.07 R)
• M55: 11,854,135 km (0.074 R)
• M56: 12,703,552 km (0.106 R)
• M57: 12,886,211 km (0.119 R)
• M58: 13,122,426 km (0.09 R)
• M59: 13,947,009 km (0.083 R)
• M60: 14,243,662 km (0.085 R)
• M61: 14,487,806 km (0.113 R)
• M62: 15,841,966 km (0.096 R)
• M63: 16,123,210 km (0.104 R)
• M64: 16,321,128 km (0.038 R)
• M65: 17,005,837 km (0.099 R)
• M66: 17,264,941 km (0.057 R)
• M67: 17,351,707 km (0.118 R)
• M68: 17,641,628 km (0.109 R)
• M69: 18,050,329 km (0.064 R)
• M70: 18,138,293 km (0.072 R)
• M71: 18,285,348 km (0.068 R)
• M72: 18,550,734 km (0.07 R)
• M73: 19,505,318 km (0.036 R)
• M74: 19,897,564 km (0.104 R)
• M75: 20,292,502 km (0.106 R)
• M76: 20,384,056 km (0.091 R)

Planet 6 - Gas Giant

Semi-Major Axis: 2.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 429.6

Radius: 13.9

Gravity: 2.22 G

Time & Orbit

Eccentricity (e): 0.203

Orbit Range: 2.16 AU - 3.26 AU

Year: 3079 Days

Day: 14.3 Hours

Environment

Temp: -202 °C

Axial Tilt: 48.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 26,570,942 km

• M1: 206,894 km (0.074 R)
• M2: 338,091 km (0.049 R)
• M3: 458,966 km (0.103 R)
• M4: 546,032 km (0.095 R)
• M5: 673,340 km (0.106 R)
• M6: 785,688 km (0.057 R)
• M7: 895,792 km (0.073 R)
• M8: 982,260 km (0.099 R)
• M9: 1,185,862 km (0.075 R)
• M10: 1,314,965 km (0.048 R)
• M11: 1,437,935 km (0.027 R)
• M12: 1,541,606 km (0.099 R)
• M13: 1,671,906 km (0.098 R)
• M14: 1,793,678 km (0.115 R)
• M15: 2,033,783 km (0.113 R)
• M16: 2,352,277 km (0.106 R)
• M17: 2,448,319 km (0.083 R)
• M18: 2,658,803 km (0.06 R)
• M19: 3,142,902 km (0.081 R)
• M20: 3,639,118 km (0.049 R)
• M21: 3,735,010 km (0.095 R)
• M22: 3,896,576 km (0.087 R)
• M23: 4,077,140 km (0.072 R)
• M24: 4,310,962 km (0.066 R)
• M25: 4,463,701 km (0.077 R)
• M26: 4,670,296 km (0.11 R)
• M27: 5,491,139 km (0.116 R)
• M28: 5,583,142 km (0.085 R)
• M29: 5,805,893 km (0.113 R)
• M30: 5,918,391 km (0.117 R)
• M31: 6,069,634 km (0.084 R)
• M32: 6,241,373 km (0.109 R)
• M33: 6,570,039 km (0.06 R)
• M34: 6,766,012 km (0.117 R)
• M35: 7,103,804 km (0.073 R)
• M36: 7,487,822 km (0.09 R)
• M37: 8,003,486 km (0.102 R)
• M38: 8,192,129 km (0.073 R)
• M39: 8,382,118 km (0.112 R)
• M40: 8,509,576 km (0.119 R)
• M41: 10,157,247 km (0.114 R)
• M42: 10,774,338 km (0.107 R)
• M43: 10,982,728 km (0.095 R)
• M44: 11,099,115 km (0.095 R)
• M45: 11,286,112 km (0.09 R)
• M46: 11,663,398 km (0.037 R)
• M47: 12,068,808 km (0.12 R)
• M48: 12,236,956 km (0.115 R)
• M49: 12,381,917 km (0.108 R)
• M50: 12,527,326 km (0.104 R)
• M51: 12,648,949 km (0.099 R)
• M52: 13,436,731 km (0.12 R)
• M53: 14,012,833 km (0.103 R)
• M54: 14,265,952 km (0.048 R)
• M55: 14,597,162 km (0.095 R)
• M56: 15,085,748 km (0.056 R)
• M57: 15,189,270 km (0.083 R)
• M58: 15,684,439 km (0.09 R)
• M59: 15,868,295 km (0.074 R)
• M60: 16,237,951 km (0.104 R)
• M61: 16,503,787 km (0.112 R)
• M62: 16,637,228 km (0.052 R)
• M63: 16,771,118 km (0.113 R)
• M64: 17,690,547 km (0.104 R)
• M65: 17,799,753 km (0.049 R)
• M66: 18,239,122 km (0.112 R)
• M67: 18,681,932 km (0.1 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.8 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 424.7

Radius: 9.7

Gravity: 4.51 G

Time & Orbit

Eccentricity (e): 0.08

Orbit Range: 2.58 AU - 3.02 AU

Year: 3234 Days

Day: 11.1 Hours

Environment

Temp: -213 °C

Axial Tilt: 11.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (70)

Outer Limit: 26,570,942 km

• M1: 174,730 km (0.026 R)
• M2: 235,317 km (0.117 R)
• M3: 328,218 km (0.1 R)
• M4: 521,648 km (0.114 R)
• M5: 586,573 km (0.095 R)
• M6: 1,038,359 km (0.11 R)
• M7: 1,254,677 km (0.105 R)
• M8: 1,333,964 km (0.091 R)
• M9: 1,668,166 km (0.038 R)
• M10: 1,755,830 km (0.084 R)
• M11: 1,858,006 km (0.075 R)
• M12: 2,015,083 km (0.055 R)
• M13: 2,108,881 km (0.042 R)
• M14: 2,190,262 km (0.106 R)
• M15: 2,342,553 km (0.075 R)
• M16: 2,657,606 km (0.058 R)
• M17: 2,971,163 km (0.068 R)
• M18: 3,032,199 km (0.104 R)
• M19: 3,344,111 km (0.071 R)
• M20: 3,503,881 km (0.099 R)
• M21: 3,649,889 km (0.048 R)
• M22: 3,931,282 km (0.092 R)
• M23: 4,185,449 km (0.065 R)
• M24: 4,340,582 km (0.097 R)
• M25: 4,799,399 km (0.062 R)
• M26: 4,889,457 km (0.088 R)
• M27: 5,126,121 km (0.101 R)
• M28: 5,255,224 km (0.088 R)
• M29: 5,667,815 km (0.083 R)
• M30: 5,801,405 km (0.093 R)
• M31: 6,032,684 km (0.068 R)
• M32: 6,149,520 km (0.108 R)
• M33: 6,247,506 km (0.108 R)
• M34: 6,345,942 km (0.076 R)
• M35: 6,444,826 km (0.092 R)
• M36: 6,604,297 km (0.084 R)
• M37: 6,988,165 km (0.118 R)
• M38: 7,317,131 km (0.092 R)
• M39: 7,630,239 km (0.113 R)
• M40: 8,075,742 km (0.052 R)
• M41: 8,683,109 km (0.091 R)
• M42: 8,925,757 km (0.067 R)
• M43: 9,103,629 km (0.12 R)
• M44: 9,553,470 km (0.117 R)
• M45: 9,781,158 km (0.089 R)
• M46: 10,288,294 km (0.039 R)
• M47: 10,756,835 km (0.064 R)
• M48: 11,304,214 km (0.078 R)
• M49: 11,811,949 km (0.119 R)
• M50: 11,958,405 km (0.065 R)
• M51: 12,154,677 km (0.11 R)
• M52: 12,475,714 km (0.118 R)
• M53: 12,674,829 km (0.119 R)
• M54: 12,975,222 km (0.058 R)
• M55: 14,174,697 km (0.114 R)
• M56: 14,408,519 km (0.105 R)
• M57: 14,591,178 km (0.071 R)
• M58: 14,853,423 km (0.027 R)
• M59: 15,223,379 km (0.118 R)
• M60: 15,329,593 km (0.031 R)
• M61: 15,837,478 km (0.115 R)
• M62: 16,053,048 km (0.12 R)
• M63: 16,514,259 km (0.11 R)
• M64: 16,815,100 km (0.07 R)
• M65: 17,255,965 km (0.09 R)
• M66: 18,233,288 km (0.056 R)
• M67: 18,374,358 km (0.095 R)
• M68: 18,544,152 km (0.093 R)
• M69: 18,714,544 km (0.091 R)
• M70: 19,171,266 km (0.081 R)

Planet 8 - Ice Giant

Semi-Major Axis: 9.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 26.1

Radius: 6.3

Gravity: 0.66 G

Time & Orbit

Eccentricity (e): 0.038

Orbit Range: 9.42 AU - 10.16 AU

Year: 21144 Days

Day: 22.5 Hours

Environment

Temp: -239 °C

Axial Tilt: 26.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (53)

Outer Limit: 26,570,942 km

• M1: 113,246 km (0.057 R)
• M2: 237,113 km (0.115 R)
• M3: 339,737 km (0.12 R)
• M4: 410,796 km (0.107 R)
• M5: 1,320,052 km (0.087 R)
• M6: 1,526,048 km (0.089 R)
• M7: 2,377,260 km (0.083 R)
• M8: 2,609,585 km (0.115 R)
• M9: 3,173,719 km (0.077 R)
• M10: 4,003,538 km (0.116 R)
• M11: 4,409,846 km (0.069 R)
• M12: 4,606,866 km (0.105 R)
• M13: 4,739,709 km (0.12 R)
• M14: 4,874,048 km (0.066 R)
• M15: 5,192,093 km (0.082 R)
• M16: 5,446,858 km (0.047 R)
• M17: 5,920,336 km (0.062 R)
• M18: 5,992,592 km (0.105 R)
• M19: 6,357,760 km (0.094 R)
• M20: 6,805,656 km (0.075 R)
• M21: 7,652,978 km (0.116 R)
• M22: 7,995,857 km (0.072 R)
• M23: 8,048,964 km (0.065 R)
• M24: 8,478,759 km (0.079 R)
• M25: 8,560,289 km (0.109 R)
• M26: 8,723,949 km (0.089 R)
• M27: 9,388,762 km (0.12 R)
• M28: 9,784,150 km (0.102 R)
• M29: 10,242,667 km (0.091 R)
• M30: 10,503,566 km (0.113 R)
• M31: 11,359,415 km (0.066 R)
• M32: 12,949,192 km (0.117 R)
• M33: 13,042,990 km (0.029 R)
• M34: 13,452,289 km (0.115 R)
• M35: 14,218,829 km (0.077 R)
• M36: 15,527,661 km (0.098 R)
• M37: 15,793,945 km (0.084 R)
• M38: 16,129,044 km (0.101 R)
• M39: 18,013,528 km (0.098 R)
• M40: 20,986,337 km (0.063 R)
• M41: 21,133,392 km (0.099 R)
• M42: 21,465,499 km (0.049 R)
• M43: 21,836,652 km (0.103 R)
• M44: 21,911,002 km (0.117 R)
• M45: 22,022,901 km (0.093 R)
• M46: 22,134,950 km (0.115 R)
• M47: 22,247,298 km (0.083 R)
• M48: 22,547,541 km (0.109 R)
• M49: 22,622,788 km (0.109 R)
• M50: 24,338,377 km (0.106 R)
• M51: 24,454,315 km (0.043 R)
• M52: 25,583,779 km (0.105 R)
• M53: 26,451,746 km (0.03 R)

Kuiper Belt

Range: 30 - 50 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 165 - 12,577 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit