🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.65 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.13

Radius: 1.76

Gravity: 1.33 G

Time & Orbit

Eccentricity (e): 0.128

Orbit Range: 0.57 AU - 0.73 AU

Year: 189 Days

Day: 31.5 Hours

Environment

Temp: 175 °C

Axial Tilt: 19.2 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Planet 2 - Terrestrial

Semi-Major Axis: 1.73 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.29

Radius: 1.61

Gravity: 1.27 G

Time & Orbit

Eccentricity (e): 0.107

Orbit Range: 1.54 AU - 1.92 AU

Year: 819 Days

Day: 33.5 Hours

Environment

Temp: -37 °C

Axial Tilt: 4.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 1.82 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.47

Radius: 0.74

Gravity: 0.86 G

Time & Orbit

Eccentricity (e): 0.186

Orbit Range: 1.48 AU - 2.16 AU

Year: 884 Days

Day: 40.7 Hours

Environment

Temp: -51 °C

Axial Tilt: 11 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 2.35 AU

Composition

Type: Inner System (Rocky)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Terrestrial

Semi-Major Axis: 2.88 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.49

Radius: 1.44

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.064

Orbit Range: 2.7 AU - 3.06 AU

Year: 1759 Days

Day: 25.7 Hours

Environment

Temp: -86 °C

Axial Tilt: 26.1 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (1)

Outer Limit: 63,276,756 km

• M1: 212,130 km (0.104 R)

Planet 5 - Terrestrial

Semi-Major Axis: 3.98 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.07

Radius: 1.34

Gravity: 1.15 G

Time & Orbit

Eccentricity (e): 0.062

Orbit Range: 3.73 AU - 4.23 AU

Year: 2858 Days

Day: 13.3 Hours

Environment

Temp: -123 °C

Axial Tilt: 18.3 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Satellites (2)

Outer Limit: 63,276,756 km

• M1: 135,386 km (0.053 R)
• M2: 2,966,376 km (0.085 R)

Planet 6 - Gas Giant

Semi-Major Axis: 6.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 456.9

Radius: 10

Gravity: 4.57 G

Time & Orbit

Eccentricity (e): 0.04

Orbit Range: 6.44 AU - 6.98 AU

Year: 6255 Days

Day: 8.9 Hours

Environment

Temp: -149 °C

Axial Tilt: 35.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 63,276,756 km

• M1: 244,892 km (0.083 R)
• M2: 561,590 km (0.116 R)
• M3: 1,060,350 km (0.054 R)
• M4: 1,162,375 km (0.096 R)
• M5: 1,361,041 km (0.088 R)
• M6: 1,620,893 km (0.089 R)
• M7: 1,861,446 km (0.113 R)
• M8: 2,357,812 km (0.027 R)
• M9: 2,631,127 km (0.108 R)
• M10: 2,832,636 km (0.11 R)
• M11: 2,914,765 km (0.08 R)
• M12: 3,018,436 km (0.105 R)
• M13: 3,229,668 km (0.071 R)
• M14: 3,315,538 km (0.06 R)
• M15: 3,380,313 km (0.083 R)
• M16: 3,846,760 km (0.115 R)
• M17: 4,122,319 km (0.063 R)
• M18: 4,815,107 km (0.061 R)
• M19: 5,339,148 km (0.087 R)
• M20: 5,620,990 km (0.068 R)
• M21: 5,855,261 km (0.093 R)
• M22: 6,279,670 km (0.094 R)
• M23: 6,441,385 km (0.081 R)
• M24: 7,299,030 km (0.101 R)
• M25: 7,583,266 km (0.066 R)
• M26: 8,016,651 km (0.099 R)
• M27: 8,428,344 km (0.084 R)
• M28: 8,517,504 km (0.093 R)
• M29: 10,206,614 km (0.078 R)
• M30: 10,301,609 km (0.053 R)
• M31: 11,072,786 km (0.088 R)
• M32: 11,531,153 km (0.081 R)
• M33: 11,663,248 km (0.095 R)
• M34: 11,795,942 km (0.104 R)
• M35: 11,995,804 km (0.083 R)
• M36: 12,096,185 km (0.111 R)
• M37: 13,879,990 km (0.091 R)
• M38: 14,338,657 km (0.115 R)
• M39: 15,126,290 km (0.096 R)
• M40: 15,598,271 km (0.097 R)
• M41: 15,781,079 km (0.115 R)
• M42: 16,001,437 km (0.114 R)
• M43: 16,259,793 km (0.104 R)
• M44: 16,408,044 km (0.118 R)
• M45: 17,080,786 km (0.114 R)
• M46: 17,193,732 km (0.103 R)
• M47: 17,496,369 km (0.097 R)
• M48: 17,648,210 km (0.05 R)
• M49: 19,074,477 km (0.106 R)
• M50: 19,152,567 km (0.107 R)
• M51: 19,426,929 km (0.059 R)
• M52: 20,019,187 km (0.09 R)
• M53: 20,098,624 km (0.054 R)
• M54: 20,497,302 km (0.092 R)
• M55: 20,938,915 km (0.087 R)
• M56: 21,464,751 km (0.115 R)
• M57: 21,586,823 km (0.113 R)
• M58: 21,709,045 km (0.07 R)
• M59: 21,954,086 km (0.079 R)
• M60: 22,200,174 km (0.085 R)
• M61: 22,819,210 km (0.063 R)
• M62: 23,569,743 km (0.088 R)
• M63: 24,159,009 km (0.077 R)
• M64: 24,413,026 km (0.036 R)
• M65: 24,540,334 km (0.112 R)
• M66: 25,180,463 km (0.118 R)
• M67: 26,085,830 km (0.12 R)
• M68: 26,957,835 km (0.107 R)
• M69: 27,353,522 km (0.065 R)
• M70: 27,662,441 km (0.106 R)
• M71: 29,224,842 km (0.106 R)
• M72: 30,039,402 km (0.098 R)
• M73: 30,540,854 km (0.111 R)

Planet 7 - Gas Giant

Semi-Major Axis: 8.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 687.5

Radius: 13.3

Gravity: 3.89 G

Time & Orbit

Eccentricity (e): 0.098

Orbit Range: 7.84 AU - 9.54 AU

Year: 9219 Days

Day: 13.6 Hours

Environment

Temp: -158 °C

Axial Tilt: 96.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (79)

Outer Limit: 63,276,756 km

• M1: 176,825 km (0.078 R)
• M2: 749,635 km (0.084 R)
• M3: 933,341 km (0.057 R)
• M4: 1,470,846 km (0.11 R)
• M5: 1,863,092 km (0.038 R)
• M6: 2,071,781 km (0.051 R)
• M7: 2,264,014 km (0.109 R)
• M8: 2,362,300 km (0.071 R)
• M9: 2,614,672 km (0.095 R)
• M10: 2,770,553 km (0.117 R)
• M11: 3,682,202 km (0.083 R)
• M12: 3,769,567 km (0.09 R)
• M13: 3,916,622 km (0.051 R)
• M14: 4,186,347 km (0.087 R)
• M15: 4,308,119 km (0.092 R)
• M16: 4,400,272 km (0.062 R)
• M17: 5,128,963 km (0.116 R)
• M18: 5,259,712 km (0.103 R)
• M19: 5,358,297 km (0.103 R)
• M20: 5,895,353 km (0.103 R)
• M21: 6,170,314 km (0.084 R)
• M22: 7,239,041 km (0.067 R)
• M23: 7,533,749 km (0.092 R)
• M24: 7,682,599 km (0.12 R)
• M25: 8,058,987 km (0.119 R)
• M26: 8,211,278 km (0.083 R)
• M27: 8,441,509 km (0.104 R)
• M28: 9,463,860 km (0.077 R)
• M29: 9,867,625 km (0.088 R)
• M30: 10,442,231 km (0.08 R)
• M31: 10,775,535 km (0.066 R)
• M32: 11,282,073 km (0.051 R)
• M33: 12,143,607 km (0.087 R)
• M34: 13,340,091 km (0.116 R)
• M35: 13,838,401 km (0.065 R)
• M36: 14,527,748 km (0.032 R)
• M37: 15,416,958 km (0.095 R)
• M38: 15,892,081 km (0.075 R)
• M39: 17,840,294 km (0.1 R)
• M40: 18,339,053 km (0.081 R)
• M41: 18,842,450 km (0.1 R)
• M42: 18,943,728 km (0.044 R)
• M43: 19,146,732 km (0.112 R)
• M44: 19,248,608 km (0.051 R)
• M45: 19,657,459 km (0.065 R)
• M46: 20,380,017 km (0.105 R)
• M47: 21,058,743 km (0.07 R)
• M48: 22,438,334 km (0.093 R)
• M49: 22,976,737 km (0.099 R)
• M50: 23,193,355 km (0.117 R)
• M51: 24,011,505 km (0.109 R)
• M52: 24,121,310 km (0.095 R)
• M53: 25,172,834 km (0.106 R)
• M54: 25,563,883 km (0.078 R)
• M55: 27,435,053 km (0.056 R)
• M56: 29,408,697 km (0.116 R)
• M57: 29,820,690 km (0.087 R)
• M58: 29,997,814 km (0.079 R)
• M59: 30,948,658 km (0.09 R)
• M60: 31,187,865 km (0.094 R)
• M61: 31,487,809 km (0.118 R)
• M62: 31,788,650 km (0.098 R)
• M63: 32,150,976 km (0.119 R)
• M64: 34,230,087 km (0.032 R)
• M65: 34,353,655 km (0.055 R)
• M66: 34,601,389 km (0.053 R)
• M67: 36,857,774 km (0.108 R)
• M68: 37,174,772 km (0.026 R)
• M69: 37,365,509 km (0.101 R)
• M70: 37,620,424 km (0.113 R)
• M71: 39,161,282 km (0.101 R)
• M72: 40,460,988 km (0.072 R)
• M73: 41,576,988 km (0.069 R)
• M74: 42,969,445 km (0.096 R)
• M75: 43,303,198 km (0.06 R)
• M76: 43,772,038 km (0.108 R)
• M77: 43,906,227 km (0.105 R)
• M78: 45,120,663 km (0.09 R)
• M79: 45,324,116 km (0.12 R)

Planet 8 - Gas Giant

Semi-Major Axis: 9.71 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 940.2

Radius: 11.4

Gravity: 7.23 G

Time & Orbit

Eccentricity (e): 0.069

Orbit Range: 9.04 AU - 10.38 AU

Year: 10889 Days

Day: 11.5 Hours

Environment

Temp: -178 °C

Axial Tilt: 33.4 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (85)

Outer Limit: 63,276,756 km

• M1: 391,348 km (0.069 R)
• M2: 625,917 km (0.061 R)
• M3: 1,228,348 km (0.051 R)
• M4: 1,893,610 km (0.098 R)
• M5: 2,687,227 km (0.116 R)
• M6: 2,808,401 km (0.055 R)
• M7: 2,900,553 km (0.044 R)
• M8: 3,607,104 km (0.104 R)
• M9: 4,329,811 km (0.115 R)
• M10: 4,762,897 km (0.073 R)
• M11: 4,910,251 km (0.109 R)
• M12: 5,096,799 km (0.105 R)
• M13: 5,361,887 km (0.091 R)
• M14: 6,630,626 km (0.107 R)
• M15: 6,878,660 km (0.102 R)
• M16: 7,045,761 km (0.103 R)
• M17: 7,171,872 km (0.07 R)
• M18: 8,032,059 km (0.114 R)
• M19: 9,522,054 km (0.108 R)
• M20: 10,465,867 km (0.106 R)
• M21: 10,754,890 km (0.072 R)
• M22: 10,851,830 km (0.117 R)
• M23: 11,488,967 km (0.056 R)
• M24: 11,837,081 km (0.08 R)
• M25: 12,441,905 km (0.048 R)
• M26: 12,850,756 km (0.055 R)
• M27: 13,524,545 km (0.077 R)
• M28: 14,103,788 km (0.113 R)
• M29: 14,316,367 km (0.068 R)
• M30: 16,612,395 km (0.104 R)
• M31: 17,175,780 km (0.118 R)
• M32: 17,974,932 km (0.078 R)
• M33: 18,090,123 km (0.069 R)
• M34: 18,379,146 km (0.034 R)
• M35: 19,432,315 km (0.07 R)
• M36: 20,085,459 km (0.057 R)
• M37: 20,324,816 km (0.05 R)
• M38: 20,866,809 km (0.06 R)
• M39: 21,596,846 km (0.095 R)
• M40: 22,149,760 km (0.119 R)
• M41: 22,832,076 km (0.098 R)
• M42: 23,773,495 km (0.118 R)
• M43: 24,153,623 km (0.106 R)
• M44: 25,177,022 km (0.098 R)
• M45: 26,476,280 km (0.09 R)
• M46: 26,607,477 km (0.048 R)
• M47: 26,870,321 km (0.025 R)
• M48: 28,532,951 km (0.069 R)
• M49: 29,886,962 km (0.119 R)
• M50: 30,297,309 km (0.107 R)
• M51: 31,400,443 km (0.072 R)
• M52: 32,096,672 km (0.11 R)
• M53: 32,586,904 km (0.06 R)
• M54: 33,009,219 km (0.104 R)
• M55: 33,575,148 km (0.092 R)
• M56: 33,717,116 km (0.051 R)
• M57: 34,358,442 km (0.115 R)
• M58: 35,003,807 km (0.098 R)
• M59: 36,015,538 km (0.103 R)
• M60: 37,772,415 km (0.118 R)
• M61: 38,586,976 km (0.063 R)
• M62: 39,632,066 km (0.106 R)
• M63: 40,082,805 km (0.053 R)
• M64: 40,837,825 km (0.081 R)
• M65: 41,293,201 km (0.12 R)
• M66: 41,902,812 km (0.075 R)
• M67: 42,132,146 km (0.044 R)
• M68: 43,439,930 km (0.054 R)
• M69: 43,904,581 km (0.091 R)
• M70: 43,982,223 km (0.065 R)
• M71: 44,604,849 km (0.074 R)
• M72: 45,937,467 km (0.048 R)
• M73: 46,016,305 km (0.058 R)
• M74: 48,080,905 km (0.112 R)
• M75: 48,321,010 km (0.099 R)
• M76: 48,481,379 km (0.116 R)
• M77: 48,722,231 km (0.089 R)
• M78: 48,963,383 km (0.117 R)
• M79: 49,204,984 km (0.111 R)
• M80: 49,447,033 km (0.069 R)
• M81: 49,689,531 km (0.074 R)
• M82: 50,013,261 km (0.055 R)
• M83: 50,256,657 km (0.115 R)
• M84: 50,907,557 km (0.099 R)
• M85: 50,989,088 km (0.073 R)

Planet 9 - Gas Giant

Semi-Major Axis: 10.46 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 539.8

Radius: 13.6

Gravity: 2.92 G

Time & Orbit

Eccentricity (e): 0.21

Orbit Range: 8.26 AU - 12.66 AU

Year: 12175 Days

Day: 6.4 Hours

Environment

Temp: -165 °C

Axial Tilt: 42.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 63,276,756 km

• M1: 186,848 km (0.087 R)
• M2: 417,528 km (0.071 R)
• M3: 853,755 km (0.097 R)
• M4: 1,120,937 km (0.087 R)
• M5: 1,286,242 km (0.116 R)
• M6: 1,415,944 km (0.097 R)
• M7: 1,642,285 km (0.066 R)
• M8: 1,760,169 km (0.093 R)
• M9: 1,905,428 km (0.063 R)
• M10: 2,156,902 km (0.06 R)
• M11: 2,473,152 km (0.069 R)
• M12: 2,832,935 km (0.033 R)
• M13: 3,664,549 km (0.093 R)
• M14: 4,172,584 km (0.075 R)
• M15: 4,468,189 km (0.059 R)
• M16: 4,804,784 km (0.111 R)
• M17: 5,114,901 km (0.111 R)
• M18: 5,864,087 km (0.105 R)
• M19: 5,974,041 km (0.114 R)
• M20: 6,270,395 km (0.103 R)
• M21: 6,571,685 km (0.054 R)
• M22: 6,954,955 km (0.118 R)
• M23: 7,149,432 km (0.045 R)
• M24: 7,345,704 km (0.12 R)
• M25: 7,623,358 km (0.115 R)
• M26: 8,643,765 km (0.085 R)
• M27: 8,769,128 km (0.095 R)
• M28: 9,447,854 km (0.117 R)
• M29: 9,793,574 km (0.085 R)
• M30: 11,081,761 km (0.116 R)
• M31: 11,538,334 km (0.104 R)
• M32: 12,047,715 km (0.084 R)
• M33: 12,470,030 km (0.108 R)
• M34: 13,232,680 km (0.117 R)
• M35: 14,903,389 km (0.095 R)
• M36: 15,154,713 km (0.049 R)
• M37: 15,458,098 km (0.108 R)
• M38: 17,797,210 km (0.052 R)
• M39: 18,601,149 km (0.12 R)
• M40: 19,691,717 km (0.079 R)
• M41: 19,857,023 km (0.074 R)
• M42: 20,189,130 km (0.106 R)
• M43: 20,578,982 km (0.118 R)
• M44: 21,309,618 km (0.087 R)
• M45: 21,649,654 km (0.113 R)
• M46: 22,507,598 km (0.116 R)
• M47: 23,260,225 km (0.103 R)
• M48: 23,435,105 km (0.076 R)
• M49: 23,962,288 km (0.086 R)
• M50: 24,197,904 km (0.055 R)
• M51: 24,611,991 km (0.097 R)
• M52: 25,387,357 km (0.104 R)
• M53: 25,687,600 km (0.118 R)
• M54: 25,928,752 km (0.061 R)
• M55: 26,839,653 km (0.047 R)
• M56: 26,961,875 km (0.078 R)
• M57: 27,514,340 km (0.111 R)
• M58: 27,699,243 km (0.097 R)
• M59: 27,822,810 km (0.105 R)
• M60: 27,946,528 km (0.109 R)
• M61: 28,070,544 km (0.119 R)
• M62: 28,880,318 km (0.07 R)
• M63: 29,068,362 km (0.109 R)
• M64: 29,193,875 km (0.081 R)
• M65: 30,141,428 km (0.085 R)
• M66: 30,970,649 km (0.051 R)
• M67: 31,420,340 km (0.118 R)
• M68: 32,261,080 km (0.073 R)
• M69: 33,371,844 km (0.053 R)
• M70: 34,295,910 km (0.096 R)
• M71: 35,295,374 km (0.069 R)
• M72: 35,899,599 km (0.062 R)
• M73: 36,236,793 km (0.117 R)
• M74: 38,488,540 km (0.068 R)
• M75: 39,179,832 km (0.114 R)
• M76: 39,805,450 km (0.035 R)
• M77: 40,224,324 km (0.103 R)
• M78: 41,772,961 km (0.093 R)
• M79: 42,127,658 km (0.073 R)
• M80: 42,412,044 km (0.106 R)
• M81: 48,457,144 km (0.084 R)
• M82: 48,755,143 km (0.034 R)

Planet 10 - Ice Giant

Semi-Major Axis: 19.2 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 171.9

Radius: 5.4

Gravity: 5.9 G

Time & Orbit

Eccentricity (e): 0.054

Orbit Range: 18.16 AU - 20.24 AU

Year: 30278 Days

Day: 20.9 Hours

Environment

Temp: -195 °C

Axial Tilt: 39 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (61)

Outer Limit: 63,276,756 km

• M1: 83,176 km (0.104 R)
• M2: 517,010 km (0.094 R)
• M3: 1,237,773 km (0.065 R)
• M4: 1,661,284 km (0.119 R)
• M5: 1,859,801 km (0.052 R)
• M6: 1,976,786 km (0.086 R)
• M7: 2,065,947 km (0.082 R)
• M8: 2,341,805 km (0.09 R)
• M9: 3,593,341 km (0.119 R)
• M10: 3,629,693 km (0.066 R)
• M11: 3,999,349 km (0.106 R)
• M12: 4,265,185 km (0.098 R)
• M13: 4,342,228 km (0.075 R)
• M14: 4,734,324 km (0.108 R)
• M15: 5,343,486 km (0.11 R)
• M16: 5,891,314 km (0.051 R)
• M17: 7,638,766 km (0.101 R)
• M18: 8,063,325 km (0.105 R)
• M19: 8,592,602 km (0.101 R)
• M20: 8,738,909 km (0.119 R)
• M21: 9,432,445 km (0.077 R)
• M22: 10,557,571 km (0.076 R)
• M23: 11,348,794 km (0.083 R)
• M24: 11,455,756 km (0.089 R)
• M25: 11,941,052 km (0.112 R)
• M26: 12,987,638 km (0.109 R)
• M27: 14,120,543 km (0.107 R)
• M28: 14,177,989 km (0.096 R)
• M29: 14,524,607 km (0.095 R)
• M30: 15,049,546 km (0.086 R)
• M31: 15,343,954 km (0.1 R)
• M32: 18,704,671 km (0.103 R)
• M33: 20,110,143 km (0.084 R)
• M34: 21,615,396 km (0.109 R)
• M35: 21,947,504 km (0.12 R)
• M36: 22,549,336 km (0.097 R)
• M37: 22,616,505 km (0.107 R)
• M38: 22,818,612 km (0.068 R)
• M39: 23,156,703 km (0.112 R)
• M40: 25,429,095 km (0.088 R)
• M41: 27,555,629 km (0.045 R)
• M42: 27,843,455 km (0.087 R)
• M43: 28,785,772 km (0.099 R)
• M44: 29,517,754 km (0.083 R)
• M45: 29,664,959 km (0.098 R)
• M46: 29,738,561 km (0.062 R)
• M47: 33,421,511 km (0.094 R)
• M48: 34,345,128 km (0.078 R)
• M49: 39,006,747 km (0.109 R)
• M50: 42,526,785 km (0.109 R)
• M51: 45,720,999 km (0.103 R)
• M52: 48,036,923 km (0.058 R)
• M53: 49,689,531 km (0.088 R)
• M54: 50,127,554 km (0.077 R)
• M55: 51,095,452 km (0.106 R)
• M56: 52,692,858 km (0.094 R)
• M57: 56,118,500 km (0.116 R)
• M58: 59,708,250 km (0.093 R)
• M59: 60,640,694 km (0.103 R)
• M60: 62,519,793 km (0.1 R)
• M61: 62,614,189 km (0.1 R)

Kuiper Belt

Range: 30.5 - 53.5 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 453 - 20,035 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit