Star System Generated (Seed: 1768191786)
Star Details
Spectral Class: M5V
Temperature: 3,050 K
Mass: 0.3 sol
Luminosity: 0.01 lux
Habitable Zone (HZ)
Inner Boundary: 0.1 AU
Outer Boundary: 0.14 AU
Physical Limits
Snow Line: 0.48 AU
Max System Radius: 11 AU
Planetary System (6 Planets)
Planet 1 - Gas Giant
Semi-Major Axis: 0.98 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 897.7
Radius: 11.8
Gravity: 6.45 G
Time & Orbit
Eccentricity (e): 0.148
Orbit Range: 0.83 AU - 1.13 AU
Year: 647 Days
Day: 7.1 Hours
Environment
Temp: -182 °C
Axial Tilt: 38.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (53)
Outer Limit: 56,123,427 km
- M1: 148,850 km (0.111 R)
- M2: 271,819 km (0.111 R)
- M3: 363,523 km (0.065 R)
- M4: 462,257 km (0.115 R)
- M5: 624,571 km (0.112 R)
- M6: 713,582 km (0.098 R)
- M7: 946,057 km (0.044 R)
- M8: 1,051,075 km (0.097 R)
- M9: 1,197,531 km (0.075 R)
- M10: 1,305,690 km (0.113 R)
- M11: 1,477,728 km (0.111 R)
- M12: 1,587,383 km (0.104 R)
- M13: 1,678,638 km (0.091 R)
- M14: 1,852,022 km (0.109 R)
- M15: 1,933,552 km (0.113 R)
- M16: 2,031,389 km (0.045 R)
- M17: 2,107,984 km (0.084 R)
- M18: 2,383,543 km (0.117 R)
- M19: 2,587,744 km (0.065 R)
- M20: 2,662,543 km (0.091 R)
- M21: 2,935,110 km (0.093 R)
- M22: 3,154,271 km (0.097 R)
- M23: 3,369,991 km (0.112 R)
- M24: 3,470,371 km (0.084 R)
- M25: 3,711,972 km (0.105 R)
- M26: 3,834,941 km (0.113 R)
- M27: 4,143,113 km (0.113 R)
- M28: 4,310,363 km (0.101 R)
- M29: 4,409,696 km (0.074 R)
- M30: 4,539,996 km (0.038 R)
- M31: 4,712,483 km (0.115 R)
- M32: 4,959,618 km (0.063 R)
- M33: 5,084,682 km (0.041 R)
- M34: 5,232,186 km (0.119 R)
- M35: 5,370,264 km (0.108 R)
- M36: 5,445,213 km (0.096 R)
- M37: 5,542,003 km (0.091 R)
- M38: 5,628,620 km (0.107 R)
- M39: 5,726,457 km (0.046 R)
- M40: 5,913,005 km (0.085 R)
- M41: 6,079,358 km (0.069 R)
- M42: 6,314,676 km (0.106 R)
- M43: 6,484,768 km (0.089 R)
- M44: 6,598,912 km (0.049 R)
- M45: 6,748,360 km (0.111 R)
- M46: 6,933,861 km (0.117 R)
- M47: 7,121,158 km (0.104 R)
- M48: 7,239,041 km (0.058 R)
- M49: 7,826,063 km (0.083 R)
- M50: 7,959,953 km (0.094 R)
- M51: 8,193,027 km (0.067 R)
- M52: 8,291,911 km (0.1 R)
- M53: 8,366,261 km (0.101 R)
Planet 2 - Gas Giant
Semi-Major Axis: 1.85 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 558.8
Radius: 11.2
Gravity: 4.45 G
Time & Orbit
Eccentricity (e): 0.114
Orbit Range: 1.64 AU - 2.06 AU
Year: 1678 Days
Day: 9.6 Hours
Environment
Temp: -198 °C
Axial Tilt: 42.9 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (60)
Outer Limit: 56,123,427 km
- M1: 154,834 km (0.065 R)
- M2: 239,207 km (0.117 R)
- M3: 342,430 km (0.108 R)
- M4: 450,140 km (0.045 R)
- M5: 527,931 km (0.046 R)
- M6: 845,677 km (0.108 R)
- M7: 922,720 km (0.12 R)
- M8: 994,377 km (0.1 R)
- M9: 1,160,580 km (0.062 R)
- M10: 1,309,580 km (0.087 R)
- M11: 2,116,062 km (0.1 R)
- M12: 2,234,543 km (0.118 R)
- M13: 2,399,699 km (0.062 R)
- M14: 2,569,044 km (0.083 R)
- M15: 2,661,047 km (0.048 R)
- M16: 2,730,760 km (0.079 R)
- M17: 2,824,707 km (0.077 R)
- M18: 2,907,883 km (0.109 R)
- M19: 3,076,630 km (0.063 R)
- M20: 3,323,317 km (0.086 R)
- M21: 3,551,005 km (0.033 R)
- M22: 3,718,704 km (0.09 R)
- M23: 3,862,617 km (0.115 R)
- M24: 4,237,509 km (0.101 R)
- M25: 4,568,121 km (0.115 R)
- M26: 4,694,381 km (0.116 R)
- M27: 4,807,477 km (0.046 R)
- M28: 4,993,427 km (0.104 R)
- M29: 5,196,282 km (0.08 R)
- M30: 5,328,078 km (0.117 R)
- M31: 5,475,880 km (0.08 R)
- M32: 5,942,925 km (0.07 R)
- M33: 6,406,978 km (0.052 R)
- M34: 6,627,634 km (0.089 R)
- M35: 6,707,071 km (0.092 R)
- M36: 6,818,821 km (0.089 R)
- M37: 6,931,169 km (0.066 R)
- M38: 7,027,958 km (0.028 R)
- M39: 7,173,966 km (0.067 R)
- M40: 7,255,646 km (0.093 R)
- M41: 7,419,606 km (0.063 R)
- M42: 7,551,850 km (0.116 R)
- M43: 7,634,877 km (0.095 R)
- M44: 7,835,338 km (0.093 R)
- M45: 8,241,496 km (0.032 R)
- M46: 8,567,919 km (0.103 R)
- M47: 8,776,309 km (0.087 R)
- M48: 8,863,674 km (0.112 R)
- M49: 9,590,719 km (0.066 R)
- M50: 10,503,267 km (0.087 R)
- M51: 10,670,517 km (0.035 R)
- M52: 11,348,195 km (0.108 R)
- M53: 11,500,636 km (0.06 R)
- M54: 11,615,527 km (0.119 R)
- M55: 11,730,717 km (0.101 R)
- M56: 12,001,040 km (0.098 R)
- M57: 12,410,340 km (0.057 R)
- M58: 12,903,714 km (0.108 R)
- M59: 13,122,725 km (0.096 R)
- M60: 13,343,083 km (0.115 R)
Planet 3 - Gas Giant
Semi-Major Axis: 3.79 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 430.2
Radius: 8.2
Gravity: 6.4 G
Time & Orbit
Eccentricity (e): 0.063
Orbit Range: 3.55 AU - 4.03 AU
Year: 4920 Days
Day: 12.4 Hours
Environment
Temp: -218 °C
Axial Tilt: 10.7 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (62)
Outer Limit: 56,123,427 km
- M1: 106,214 km (0.116 R)
- M2: 158,424 km (0.063 R)
- M3: 305,778 km (0.081 R)
- M4: 722,259 km (0.094 R)
- M5: 1,095,655 km (0.112 R)
- M6: 1,436,738 km (0.103 R)
- M7: 1,903,783 km (0.088 R)
- M8: 1,983,369 km (0.11 R)
- M9: 2,179,043 km (0.112 R)
- M10: 2,660,000 km (0.084 R)
- M11: 3,480,095 km (0.115 R)
- M12: 3,978,855 km (0.032 R)
- M13: 4,457,568 km (0.089 R)
- M14: 4,542,689 km (0.088 R)
- M15: 4,649,801 km (0.064 R)
- M16: 4,910,550 km (0.072 R)
- M17: 5,491,588 km (0.109 R)
- M18: 5,628,769 km (0.033 R)
- M19: 6,427,772 km (0.046 R)
- M20: 6,572,433 km (0.081 R)
- M21: 6,865,046 km (0.107 R)
- M22: 7,012,999 km (0.062 R)
- M23: 7,564,267 km (0.036 R)
- M24: 7,896,673 km (0.056 R)
- M25: 8,051,806 km (0.065 R)
- M26: 8,575,848 km (0.092 R)
- M27: 8,841,982 km (0.055 R)
- M28: 9,002,949 km (0.09 R)
- M29: 9,219,268 km (0.064 R)
- M30: 9,409,856 km (0.087 R)
- M31: 9,656,842 km (0.096 R)
- M32: 10,580,609 km (0.106 R)
- M33: 10,837,468 km (0.092 R)
- M34: 11,649,635 km (0.098 R)
- M35: 11,826,310 km (0.087 R)
- M36: 12,301,583 km (0.079 R)
- M37: 12,965,199 km (0.074 R)
- M38: 13,148,306 km (0.099 R)
- M39: 13,578,700 km (0.085 R)
- M40: 14,076,262 km (0.097 R)
- M41: 14,358,852 km (0.116 R)
- M42: 14,453,398 km (0.083 R)
- M43: 15,346,198 km (0.118 R)
- M44: 15,864,405 km (0.043 R)
- M45: 17,051,165 km (0.088 R)
- M46: 17,251,776 km (0.079 R)
- M47: 17,554,113 km (0.119 R)
- M48: 17,621,582 km (0.041 R)
- M49: 18,334,715 km (0.042 R)
- M50: 18,437,339 km (0.114 R)
- M51: 19,057,422 km (0.026 R)
- M52: 19,335,076 km (0.087 R)
- M53: 19,404,789 km (0.091 R)
- M54: 20,105,804 km (0.027 R)
- M55: 20,637,026 km (0.113 R)
- M56: 21,065,325 km (0.113 R)
- M57: 21,244,543 km (0.102 R)
- M58: 21,316,500 km (0.113 R)
- M59: 21,785,639 km (0.111 R)
- M60: 22,112,360 km (0.116 R)
- M61: 25,087,862 km (0.093 R)
- M62: 25,430,292 km (0.051 R)
Planet 4 - Gas Giant
Semi-Major Axis: 4.49 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 439.3
Radius: 12.3
Gravity: 2.9 G
Time & Orbit
Eccentricity (e): 0.167
Orbit Range: 3.74 AU - 5.24 AU
Year: 6345 Days
Day: 13.4 Hours
Environment
Temp: -219 °C
Axial Tilt: 15.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (84)
Outer Limit: 56,123,427 km
- M1: 226,342 km (0.065 R)
- M2: 395,836 km (0.091 R)
- M3: 492,476 km (0.095 R)
- M4: 588,219 km (0.09 R)
- M5: 667,805 km (0.037 R)
- M6: 840,142 km (0.028 R)
- M7: 972,835 km (0.106 R)
- M8: 1,171,501 km (0.052 R)
- M9: 1,383,930 km (0.115 R)
- M10: 1,625,979 km (0.033 R)
- M11: 1,970,354 km (0.071 R)
- M12: 2,132,966 km (0.12 R)
- M13: 2,319,216 km (0.117 R)
- M14: 2,414,360 km (0.056 R)
- M15: 2,648,182 km (0.09 R)
- M16: 2,992,257 km (0.044 R)
- M17: 3,265,273 km (0.116 R)
- M18: 3,415,619 km (0.11 R)
- M19: 3,546,367 km (0.076 R)
- M20: 3,656,621 km (0.06 R)
- M21: 4,086,415 km (0.059 R)
- M22: 4,460,859 km (0.055 R)
- M23: 4,556,153 km (0.103 R)
- M24: 4,846,522 km (0.101 R)
- M25: 5,217,824 km (0.044 R)
- M26: 5,831,475 km (0.107 R)
- M27: 6,199,934 km (0.106 R)
- M28: 6,306,597 km (0.076 R)
- M29: 6,603,250 km (0.088 R)
- M30: 7,043,068 km (0.119 R)
- M31: 7,492,310 km (0.064 R)
- M32: 7,864,210 km (0.041 R)
- M33: 8,212,923 km (0.119 R)
- M34: 8,448,241 km (0.112 R)
- M35: 8,895,538 km (0.117 R)
- M36: 10,000,318 km (0.043 R)
- M37: 10,314,923 km (0.114 R)
- M38: 11,180,646 km (0.104 R)
- M39: 12,069,706 km (0.103 R)
- M40: 12,438,315 km (0.096 R)
- M41: 12,947,097 km (0.069 R)
- M42: 13,359,090 km (0.107 R)
- M43: 13,670,852 km (0.102 R)
- M44: 14,372,466 km (0.113 R)
- M45: 14,478,680 km (0.06 R)
- M46: 14,942,135 km (0.102 R)
- M47: 15,301,917 km (0.071 R)
- M48: 15,810,550 km (0.088 R)
- M49: 16,030,160 km (0.118 R)
- M50: 16,620,922 km (0.096 R)
- M51: 16,807,022 km (0.119 R)
- M52: 17,407,059 km (0.088 R)
- M53: 17,709,845 km (0.117 R)
- M54: 18,899,297 km (0.073 R)
- M55: 19,288,401 km (0.093 R)
- M56: 19,405,686 km (0.102 R)
- M57: 19,758,887 km (0.104 R)
- M58: 20,591,549 km (0.089 R)
- M59: 20,711,376 km (0.086 R)
- M60: 21,112,598 km (0.083 R)
- M61: 21,354,647 km (0.037 R)
- M62: 21,435,430 km (0.108 R)
- M63: 21,719,367 km (0.111 R)
- M64: 21,800,748 km (0.106 R)
- M65: 22,127,021 km (0.081 R)
- M66: 22,537,218 km (0.073 R)
- M67: 22,660,786 km (0.086 R)
- M68: 22,949,959 km (0.074 R)
- M69: 23,074,275 km (0.064 R)
- M70: 23,406,831 km (0.082 R)
- M71: 24,034,693 km (0.088 R)
- M72: 24,287,514 km (0.102 R)
- M73: 24,456,409 km (0.058 R)
- M74: 24,625,754 km (0.101 R)
- M75: 24,795,548 km (0.114 R)
- M76: 25,736,219 km (0.115 R)
- M77: 26,427,511 km (0.112 R)
- M78: 26,644,877 km (0.106 R)
- M79: 28,271,454 km (0.066 R)
- M80: 28,761,238 km (0.057 R)
- M81: 28,940,157 km (0.116 R)
- M82: 29,388,801 km (0.111 R)
- M83: 29,478,709 km (0.109 R)
- M84: 29,930,196 km (0.073 R)
Planet 5 - Gas Giant
Semi-Major Axis: 4.64 AU
Status: Outer (Cold)
Composition: Hydrogen/Helium Atmosphere
Physical Data
Mass: 166.8
Radius: 14.2
Gravity: 0.83 G
Time & Orbit
Eccentricity (e): 0.202
Orbit Range: 3.7 AU - 5.58 AU
Year: 6665 Days
Day: 13.9 Hours
Environment
Temp: -217 °C
Axial Tilt: 3.8 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (72)
Outer Limit: 56,123,427 km
- M1: 184,604 km (0.093 R)
- M2: 282,740 km (0.102 R)
- M3: 400,174 km (0.107 R)
- M4: 788,530 km (0.073 R)
- M5: 980,913 km (0.116 R)
- M6: 1,130,511 km (0.091 R)
- M7: 1,389,315 km (0.118 R)
- M8: 1,506,301 km (0.072 R)
- M9: 1,613,413 km (0.066 R)
- M10: 1,751,043 km (0.11 R)
- M11: 1,878,500 km (0.061 R)
- M12: 1,979,928 km (0.074 R)
- M13: 2,098,110 km (0.118 R)
- M14: 2,264,613 km (0.101 R)
- M15: 2,499,182 km (0.116 R)
- M16: 2,692,612 km (0.077 R)
- M17: 2,841,163 km (0.111 R)
- M18: 2,975,502 km (0.112 R)
- M19: 3,111,935 km (0.111 R)
- M20: 3,285,618 km (0.088 R)
- M21: 3,426,988 km (0.033 R)
- M22: 3,570,303 km (0.1 R)
- M23: 3,807,715 km (0.058 R)
- M24: 3,919,015 km (0.051 R)
- M25: 4,375,439 km (0.06 R)
- M26: 4,590,411 km (0.092 R)
- M27: 5,092,012 km (0.084 R)
- M28: 5,339,148 km (0.063 R)
- M29: 5,653,752 km (0.045 R)
- M30: 5,888,172 km (0.109 R)
- M31: 6,213,398 km (0.08 R)
- M32: 6,323,053 km (0.114 R)
- M33: 6,499,878 km (0.081 R)
- M34: 7,063,263 km (0.074 R)
- M35: 7,154,817 km (0.049 R)
- M36: 7,270,008 km (0.097 R)
- M37: 8,871,303 km (0.112 R)
- M38: 9,219,418 km (0.078 R)
- M39: 9,395,045 km (0.068 R)
- M40: 9,546,588 km (0.079 R)
- M41: 9,877,798 km (0.077 R)
- M42: 10,135,106 km (0.075 R)
- M43: 10,290,538 km (0.076 R)
- M44: 10,814,580 km (0.108 R)
- M45: 10,973,453 km (0.043 R)
- M46: 11,401,003 km (0.119 R)
- M47: 11,643,950 km (0.104 R)
- M48: 11,834,089 km (0.092 R)
- M49: 12,025,275 km (0.093 R)
- M50: 12,410,639 km (0.092 R)
- M51: 12,912,241 km (0.11 R)
- M52: 13,052,863 km (0.105 R)
- M53: 13,591,415 km (0.098 R)
- M54: 14,282,258 km (0.091 R)
- M55: 14,515,033 km (0.068 R)
- M56: 15,014,091 km (0.104 R)
- M57: 16,331,600 km (0.09 R)
- M58: 16,514,109 km (0.12 R)
- M59: 16,666,699 km (0.103 R)
- M60: 17,004,192 km (0.111 R)
- M61: 17,127,460 km (0.069 R)
- M62: 17,592,410 km (0.103 R)
- M63: 17,717,175 km (0.114 R)
- M64: 17,904,771 km (0.074 R)
- M65: 18,471,447 km (0.099 R)
- M66: 19,012,244 km (0.109 R)
- M67: 19,140,150 km (0.119 R)
- M68: 19,914,169 km (0.103 R)
- M69: 20,962,102 km (0.027 R)
- M70: 21,559,447 km (0.111 R)
- M71: 22,195,986 km (0.114 R)
- M72: 22,432,051 km (0.107 R)
Planet 6 - Ice Giant
Semi-Major Axis: 6.29 AU
Status: Outer (Cold)
Composition: Methane/Ammonia Ices
Physical Data
Mass: 993.6
Radius: 3.7
Gravity: 72.58 G
Time & Orbit
Eccentricity (e): 0.24
Orbit Range: 4.78 AU - 7.8 AU
Year: 10520 Days
Day: 23.3 Hours
Environment
Temp: -237 °C
Axial Tilt: 0.4 °
Atmosphere: Hâ‚‚, CHâ‚„
Biome: None
Satellites (95)
Outer Limit: 56,123,427 km
- M1: 51,013 km (0.027 R)
- M2: 192,832 km (0.113 R)
- M3: 809,175 km (0.093 R)
- M4: 932,743 km (0.096 R)
- M5: 1,152,053 km (0.111 R)
- M6: 1,338,751 km (0.026 R)
- M7: 1,386,922 km (0.035 R)
- M8: 2,008,800 km (0.059 R)
- M9: 2,036,326 km (0.08 R)
- M10: 2,204,474 km (0.107 R)
- M11: 2,348,088 km (0.106 R)
- M12: 2,889,632 km (0.107 R)
- M13: 3,238,943 km (0.046 R)
- M14: 3,435,066 km (0.092 R)
- M15: 3,501,189 km (0.047 R)
- M16: 4,011,317 km (0.095 R)
- M17: 4,436,026 km (0.049 R)
- M18: 4,617,189 km (0.113 R)
- M19: 4,949,296 km (0.076 R)
- M20: 4,986,695 km (0.066 R)
- M21: 5,061,794 km (0.059 R)
- M22: 5,175,039 km (0.086 R)
- M23: 5,442,520 km (0.104 R)
- M24: 7,055,634 km (0.06 R)
- M25: 7,224,530 km (0.106 R)
- M26: 8,001,093 km (0.081 R)
- M27: 8,310,162 km (0.084 R)
- M28: 8,939,819 km (0.115 R)
- M29: 10,292,483 km (0.052 R)
- M30: 11,016,686 km (0.089 R)
- M31: 11,957,358 km (0.069 R)
- M32: 12,209,281 km (0.079 R)
- M33: 12,872,149 km (0.081 R)
- M34: 13,026,833 km (0.078 R)
- M35: 13,285,936 km (0.056 R)
- M36: 14,179,485 km (0.112 R)
- M37: 14,929,718 km (0.088 R)
- M38: 15,146,485 km (0.084 R)
- M39: 15,255,243 km (0.034 R)
- M40: 15,692,966 km (0.096 R)
- M41: 16,357,181 km (0.109 R)
- M42: 16,524,581 km (0.093 R)
- M43: 16,636,630 km (0.083 R)
- M44: 16,805,077 km (0.105 R)
- M45: 17,541,398 km (0.068 R)
- M46: 19,045,455 km (0.085 R)
- M47: 19,991,511 km (0.119 R)
- M48: 20,892,091 km (0.112 R)
- M49: 21,377,835 km (0.096 R)
- M50: 21,438,721 km (0.087 R)
- M51: 21,499,757 km (0.092 R)
- M52: 21,928,654 km (0.117 R)
- M53: 22,298,460 km (0.092 R)
- M54: 22,360,394 km (0.109 R)
- M55: 22,422,178 km (0.095 R)
- M56: 23,988,168 km (0.077 R)
- M57: 24,880,370 km (0.09 R)
- M58: 25,524,239 km (0.108 R)
- M59: 25,978,269 km (0.032 R)
- M60: 26,108,419 km (0.086 R)
- M61: 27,754,145 km (0.101 R)
- M62: 27,887,287 km (0.104 R)
- M63: 28,354,780 km (0.119 R)
- M64: 29,365,464 km (0.082 R)
- M65: 29,433,231 km (0.058 R)
- M66: 30,045,685 km (0.106 R)
- M67: 30,319,150 km (0.116 R)
- M68: 30,387,666 km (0.111 R)
- M69: 31,768,903 km (0.071 R)
- M70: 32,047,604 km (0.042 R)
- M71: 33,807,623 km (0.104 R)
- M72: 34,448,799 km (0.116 R)
- M73: 34,663,472 km (0.108 R)
- M74: 36,542,272 km (0.036 R)
- M75: 36,688,130 km (0.046 R)
- M76: 38,453,833 km (0.109 R)
- M77: 38,825,135 km (0.12 R)
- M78: 40,397,708 km (0.09 R)
- M79: 40,548,503 km (0.099 R)
- M80: 42,220,109 km (0.079 R)
- M81: 42,449,892 km (0.076 R)
- M82: 43,141,483 km (0.028 R)
- M83: 44,847,497 km (0.069 R)
- M84: 45,316,636 km (0.103 R)
- M85: 45,395,025 km (0.107 R)
- M86: 45,551,804 km (0.095 R)
- M87: 45,865,959 km (0.115 R)
- M88: 46,180,863 km (0.083 R)
- M89: 46,971,338 km (0.113 R)
- M90: 49,449,875 km (0.07 R)
- M91: 50,583,079 km (0.084 R)
- M92: 54,616,238 km (0.108 R)
- M93: 54,783,039 km (0.103 R)
- M94: 55,117,091 km (0.119 R)
- M95: 55,284,342 km (0.119 R)
Kuiper Belt
Range: 30 - 60 AU
Composition
Type: Dwarf Planets/TNOs (Ices)
Reservoir of dwarf planets and volatile ices.
Outer System
Oort Cloud
Range: 548 - 16,147 AU
Composition
Type: Cometary Reservoir
System's final boundary, containing trillions of icy planetesimals.