🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.36 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Gas Giant

Semi-Major Axis: 0.72 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 541.1

Radius: 14.8

Gravity: 2.47 G

Time & Orbit

Eccentricity (e): 0.234

Orbit Range: 0.55 AU - 0.89 AU

Year: 394 Days

Day: 13.5 Hours

Environment

Temp: -143 °C

Axial Tilt: 29.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (33)

Outer Limit: 80,270,721 km

• M1: 234,569 km (0.056 R)
• M2: 352,453 km (0.12 R)
• M3: 457,470 km (0.118 R)
• M4: 552,764 km (0.096 R)
• M5: 667,356 km (0.066 R)
• M6: 817,852 km (0.026 R)
• M7: 917,484 km (0.12 R)
• M8: 1,038,508 km (0.12 R)
• M9: 1,231,190 km (0.113 R)
• M10: 1,375,852 km (0.049 R)
• M11: 1,565,392 km (0.089 R)
• M12: 1,683,425 km (0.12 R)
• M13: 1,794,426 km (0.119 R)
• M14: 1,939,536 km (0.042 R)
• M15: 2,170,366 km (0.113 R)
• M16: 2,269,848 km (0.067 R)
• M17: 2,404,786 km (0.104 R)
• M18: 2,536,881 km (0.08 R)
• M19: 2,647,733 km (0.087 R)
• M20: 2,905,041 km (0.096 R)
• M21: 3,114,478 km (0.082 R)
• M22: 3,221,141 km (0.059 R)
• M23: 3,457,506 km (0.064 R)
• M24: 3,561,626 km (0.092 R)
• M25: 3,713,019 km (0.11 R)
• M26: 3,860,074 km (0.099 R)
• M27: 4,008,924 km (0.111 R)
• M28: 4,139,074 km (0.054 R)
• M29: 4,312,607 km (0.114 R)
• M30: 4,410,893 km (0.093 R)
• M31: 4,588,167 km (0.113 R)
• M32: 4,753,472 km (0.064 R)
• M33: 4,855,049 km (0.094 R)

Planet 2 - Gas Giant

Semi-Major Axis: 0.83 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 798.1

Radius: 13.1

Gravity: 4.65 G

Time & Orbit

Eccentricity (e): 0.159

Orbit Range: 0.7 AU - 0.96 AU

Year: 488 Days

Day: 11.7 Hours

Environment

Temp: -153 °C

Axial Tilt: 38.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (42)

Outer Limit: 80,270,721 km

• M1: 163,959 km (0.105 R)
• M2: 252,372 km (0.089 R)
• M3: 358,436 km (0.094 R)
• M4: 460,462 km (0.117 R)
• M5: 544,835 km (0.025 R)
• M6: 648,357 km (0.063 R)
• M7: 777,610 km (0.098 R)
• M8: 897,587 km (0.102 R)
• M9: 1,059,751 km (0.089 R)
• M10: 1,168,509 km (0.087 R)
• M11: 1,381,088 km (0.087 R)
• M12: 1,472,193 km (0.068 R)
• M13: 2,003,863 km (0.077 R)
• M14: 2,088,386 km (0.08 R)
• M15: 2,247,708 km (0.1 R)
• M16: 2,349,435 km (0.091 R)
• M17: 2,585,799 km (0.093 R)
• M18: 2,764,718 km (0.102 R)
• M19: 2,874,074 km (0.047 R)
• M20: 3,037,136 km (0.092 R)
• M21: 3,172,821 km (0.064 R)
• M22: 3,458,404 km (0.049 R)
• M23: 3,576,586 km (0.111 R)
• M24: 3,672,179 km (0.09 R)
• M25: 3,760,591 km (0.1 R)
• M26: 3,898,521 km (0.117 R)
• M27: 4,030,017 km (0.051 R)
• M28: 4,163,010 km (0.038 R)
• M29: 4,272,066 km (0.112 R)
• M30: 4,373,643 km (0.103 R)
• M31: 4,639,928 km (0.11 R)
• M32: 4,929,250 km (0.042 R)
• M33: 5,134,498 km (0.108 R)
• M34: 5,260,908 km (0.065 R)
• M35: 5,406,467 km (0.079 R)
• M36: 5,609,023 km (0.1 R)
• M37: 5,720,473 km (0.083 R)
• M38: 5,879,795 km (0.085 R)
• M39: 6,097,609 km (0.086 R)
• M40: 6,308,542 km (0.118 R)
• M41: 6,570,787 km (0.104 R)
• M42: 6,668,774 km (0.103 R)

Planet 3 - Gas Giant

Semi-Major Axis: 1.32 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 597.7

Radius: 14.2

Gravity: 2.96 G

Time & Orbit

Eccentricity (e): 0.021

Orbit Range: 1.29 AU - 1.35 AU

Year: 979 Days

Day: 13.8 Hours

Environment

Temp: -182 °C

Axial Tilt: 5.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (44)

Outer Limit: 80,270,721 km

• M1: 184,753 km (0.05 R)
• M2: 324,029 km (0.11 R)
• M3: 443,258 km (0.091 R)
• M4: 568,771 km (0.091 R)
• M5: 687,851 km (0.116 R)
• M6: 828,623 km (0.101 R)
• M7: 949,198 km (0.117 R)
• M8: 1,216,679 km (0.063 R)
• M9: 1,577,061 km (0.063 R)
• M10: 1,897,948 km (0.11 R)
• M11: 2,037,373 km (0.067 R)
• M12: 2,146,430 km (0.074 R)
• M13: 2,274,785 km (0.086 R)
• M14: 2,414,659 km (0.066 R)
• M15: 2,833,084 km (0.108 R)
• M16: 2,955,605 km (0.11 R)
• M17: 3,225,629 km (0.033 R)
• M18: 3,373,731 km (0.099 R)
• M19: 3,514,054 km (0.076 R)
• M20: 3,717,956 km (0.118 R)
• M21: 3,873,538 km (0.071 R)
• M22: 4,031,214 km (0.061 R)
• M23: 4,517,407 km (0.045 R)
• M24: 4,628,109 km (0.089 R)
• M25: 5,033,968 km (0.082 R)
• M26: 5,137,340 km (0.117 R)
• M27: 5,334,361 km (0.06 R)
• M28: 5,475,132 km (0.086 R)
• M29: 5,581,347 km (0.083 R)
• M30: 5,772,084 km (0.079 R)
• M31: 5,952,948 km (0.048 R)
• M32: 6,123,490 km (0.112 R)
• M33: 6,519,326 km (0.097 R)
• M34: 6,669,821 km (0.118 R)
• M35: 6,974,552 km (0.078 R)
• M36: 7,090,041 km (0.042 R)
• M37: 7,309,950 km (0.079 R)
• M38: 7,440,400 km (0.099 R)
• M39: 8,538,897 km (0.084 R)
• M40: 8,800,693 km (0.045 R)
• M41: 9,009,233 km (0.072 R)
• M42: 9,121,281 km (0.112 R)
• M43: 9,545,092 km (0.117 R)
• M44: 9,730,743 km (0.084 R)

Planet 4 - Gas Giant

Semi-Major Axis: 1.59 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 413.1

Radius: 9.3

Gravity: 4.78 G

Time & Orbit

Eccentricity (e): 0.119

Orbit Range: 1.4 AU - 1.78 AU

Year: 1295 Days

Day: 12.7 Hours

Environment

Temp: -171 °C

Axial Tilt: 27.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (58)

Outer Limit: 80,270,721 km

• M1: 120,426 km (0.068 R)
• M2: 188,643 km (0.037 R)
• M3: 273,914 km (0.084 R)
• M4: 334,650 km (0.105 R)
• M5: 520,451 km (0.087 R)
• M6: 687,402 km (0.096 R)
• M7: 753,076 km (0.064 R)
• M8: 957,726 km (0.066 R)
• M9: 1,073,814 km (0.105 R)
• M10: 1,216,679 km (0.098 R)
• M11: 1,335,610 km (0.076 R)
• M12: 1,482,066 km (0.096 R)
• M13: 1,740,870 km (0.085 R)
• M14: 1,833,322 km (0.109 R)
• M15: 1,901,539 km (0.105 R)
• M16: 1,979,329 km (0.116 R)
• M17: 2,120,400 km (0.106 R)
• M18: 2,450,114 km (0.071 R)
• M19: 2,516,087 km (0.046 R)
• M20: 2,601,956 km (0.094 R)
• M21: 2,825,605 km (0.1 R)
• M22: 2,924,938 km (0.094 R)
• M23: 3,825,966 km (0.096 R)
• M24: 3,903,008 km (0.094 R)
• M25: 4,272,814 km (0.117 R)
• M26: 4,341,181 km (0.114 R)
• M27: 4,502,447 km (0.102 R)
• M28: 4,890,205 km (0.119 R)
• M29: 5,106,374 km (0.115 R)
• M30: 5,227,698 km (0.105 R)
• M31: 5,325,535 km (0.075 R)
• M32: 5,473,487 km (0.037 R)
• M33: 5,672,901 km (0.028 R)
• M34: 5,874,559 km (0.066 R)
• M35: 5,976,435 km (0.087 R)
• M36: 6,053,029 km (0.033 R)
• M37: 6,220,429 km (0.088 R)
• M38: 6,298,220 km (0.101 R)
• M39: 6,415,505 km (0.113 R)
• M40: 6,480,879 km (0.102 R)
• M41: 6,811,640 km (0.118 R)
• M42: 6,918,602 km (0.044 R)
• M43: 6,985,772 km (0.073 R)
• M44: 7,161,400 km (0.095 R)
• M45: 7,242,931 km (0.045 R)
• M46: 7,503,231 km (0.12 R)
• M47: 7,738,847 km (0.116 R)
• M48: 7,934,671 km (0.115 R)
• M49: 8,345,467 km (0.114 R)
• M50: 8,748,783 km (0.057 R)
• M51: 8,850,659 km (0.117 R)
• M52: 9,291,524 km (0.097 R)
• M53: 9,499,614 km (0.077 R)
• M54: 9,619,293 km (0.083 R)
• M55: 9,829,926 km (0.108 R)
• M56: 9,966,210 km (0.061 R)
• M57: 10,286,499 km (0.071 R)
• M58: 10,347,834 km (0.084 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.26 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 489.5

Radius: 10.7

Gravity: 4.28 G

Time & Orbit

Eccentricity (e): 0.157

Orbit Range: 2.75 AU - 3.77 AU

Year: 3801 Days

Day: 11.7 Hours

Environment

Temp: -214 °C

Axial Tilt: 17.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (73)

Outer Limit: 80,270,721 km

• M1: 138,677 km (0.118 R)
• M2: 292,165 km (0.094 R)
• M3: 405,859 km (0.057 R)
• M4: 696,827 km (0.085 R)
• M5: 797,955 km (0.103 R)
• M6: 915,389 km (0.052 R)
• M7: 1,062,145 km (0.088 R)
• M8: 1,254,079 km (0.051 R)
• M9: 1,444,517 km (0.105 R)
• M10: 1,685,968 km (0.1 R)
• M11: 1,825,842 km (0.089 R)
• M12: 1,969,606 km (0.098 R)
• M13: 2,192,506 km (0.084 R)
• M14: 2,284,060 km (0.108 R)
• M15: 2,376,811 km (0.098 R)
• M16: 2,994,351 km (0.102 R)
• M17: 3,338,875 km (0.1 R)
• M18: 4,370,203 km (0.038 R)
• M19: 4,701,861 km (0.102 R)
• M20: 4,840,837 km (0.105 R)
• M21: 5,122,829 km (0.076 R)
• M22: 5,348,124 km (0.073 R)
• M23: 5,681,877 km (0.068 R)
• M24: 6,000,969 km (0.083 R)
• M25: 6,304,054 km (0.116 R)
• M26: 6,479,533 km (0.081 R)
• M27: 6,970,363 km (0.086 R)
• M28: 7,289,156 km (0.066 R)
• M29: 7,427,235 km (0.107 R)
• M30: 7,964,441 km (0.084 R)
• M31: 8,393,787 km (0.098 R)
• M32: 8,928,599 km (0.107 R)
• M33: 9,125,919 km (0.116 R)
• M34: 9,349,568 km (0.114 R)
• M35: 9,524,896 km (0.118 R)
• M36: 9,600,294 km (0.114 R)
• M37: 9,701,123 km (0.077 R)
• M38: 9,980,422 km (0.119 R)
• M39: 10,057,166 km (0.105 R)
• M40: 10,651,219 km (0.087 R)
• M41: 10,781,818 km (0.084 R)
• M42: 10,939,344 km (0.11 R)
• M43: 11,124,098 km (0.034 R)
• M44: 11,230,013 km (0.111 R)
• M45: 11,576,930 km (0.118 R)
• M46: 12,144,804 km (0.101 R)
• M47: 12,308,763 km (0.106 R)
• M48: 12,391,042 km (0.048 R)
• M49: 12,528,373 km (0.104 R)
• M50: 13,845,283 km (0.106 R)
• M51: 13,987,999 km (0.112 R)
• M52: 14,418,991 km (0.038 R)
• M53: 14,708,762 km (0.05 R)
• M54: 15,117,762 km (0.073 R)
• M55: 15,235,197 km (0.068 R)
• M56: 15,441,642 km (0.066 R)
• M57: 16,276,548 km (0.033 R)
• M58: 16,427,193 km (0.118 R)
• M59: 17,463,906 km (0.069 R)
• M60: 18,521,563 km (0.105 R)
• M61: 18,615,809 km (0.098 R)
• M62: 18,741,920 km (0.051 R)
• M63: 19,185,179 km (0.068 R)
• M64: 19,440,094 km (0.096 R)
• M65: 20,146,794 km (0.112 R)
• M66: 20,308,509 km (0.112 R)
• M67: 20,698,661 km (0.031 R)
• M68: 21,058,443 km (0.091 R)
• M69: 21,983,407 km (0.097 R)
• M70: 22,049,978 km (0.114 R)
• M71: 22,116,699 km (0.085 R)
• M72: 22,250,140 km (0.106 R)
• M73: 22,450,900 km (0.089 R)

Planet 6 - Gas Giant

Semi-Major Axis: 5.5 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 981.3

Radius: 12.9

Gravity: 5.9 G

Time & Orbit

Eccentricity (e): 0.221

Orbit Range: 4.28 AU - 6.72 AU

Year: 8328 Days

Day: 7 Hours

Environment

Temp: -213 °C

Axial Tilt: 31.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (82)

Outer Limit: 80,270,721 km

• M1: 215,421 km (0.072 R)
• M2: 315,951 km (0.101 R)
• M3: 556,205 km (0.091 R)
• M4: 1,300,305 km (0.083 R)
• M5: 1,600,548 km (0.108 R)
• M6: 1,782,309 km (0.031 R)
• M7: 2,292,587 km (0.036 R)
• M8: 2,630,828 km (0.069 R)
• M9: 3,069,449 km (0.111 R)
• M10: 4,360,479 km (0.105 R)
• M11: 4,456,221 km (0.106 R)
• M12: 5,079,446 km (0.098 R)
• M13: 5,316,110 km (0.097 R)
• M14: 6,119,301 km (0.097 R)
• M15: 6,663,538 km (0.088 R)
• M16: 7,413,472 km (0.117 R)
• M17: 7,876,328 km (0.115 R)
• M18: 8,032,658 km (0.108 R)
• M19: 9,197,427 km (0.065 R)
• M20: 9,694,690 km (0.052 R)
• M21: 9,862,539 km (0.091 R)
• M22: 10,031,285 km (0.09 R)
• M23: 10,371,620 km (0.119 R)
• M24: 10,629,378 km (0.063 R)
• M25: 11,107,492 km (0.087 R)
• M26: 11,726,229 km (0.082 R)
• M27: 11,860,269 km (0.092 R)
• M28: 12,220,201 km (0.114 R)
• M29: 12,310,858 km (0.106 R)
• M30: 12,675,278 km (0.116 R)
• M31: 12,997,213 km (0.029 R)
• M32: 15,033,090 km (0.106 R)
• M33: 15,766,419 km (0.102 R)
• M34: 15,914,521 km (0.04 R)
• M35: 16,212,071 km (0.095 R)
• M36: 16,913,535 km (0.066 R)
• M37: 17,471,685 km (0.081 R)
• M38: 17,984,357 km (0.12 R)
• M39: 19,551,843 km (0.106 R)
• M40: 20,567,164 km (0.107 R)
• M41: 21,108,409 km (0.066 R)
• M42: 21,874,051 km (0.069 R)
• M43: 22,816,069 km (0.065 R)
• M44: 23,376,462 km (0.064 R)
• M45: 24,168,434 km (0.075 R)
• M46: 25,372,996 km (0.071 R)
• M47: 25,662,767 km (0.047 R)
• M48: 26,186,958 km (0.061 R)
• M49: 26,597,155 km (0.101 R)
• M50: 26,950,356 km (0.073 R)
• M51: 27,186,720 km (0.102 R)
• M52: 28,739,995 km (0.088 R)
• M53: 28,921,008 km (0.071 R)
• M54: 29,771,023 km (0.076 R)
• M55: 29,954,281 km (0.119 R)
• M56: 30,383,328 km (0.034 R)
• M57: 30,567,782 km (0.073 R)
• M58: 31,185,322 km (0.081 R)
• M59: 31,807,050 km (0.058 R)
• M60: 32,119,560 km (0.048 R)
• M61: 32,432,968 km (0.116 R)
• M62: 32,936,514 km (0.078 R)
• M63: 33,062,775 km (0.076 R)
• M64: 33,189,335 km (0.114 R)
• M65: 35,428,366 km (0.081 R)
• M66: 36,598,969 km (0.098 R)
• M67: 37,057,487 km (0.082 R)
• M68: 37,584,071 km (0.113 R)
• M69: 38,046,628 km (0.051 R)
• M70: 39,178,186 km (0.058 R)
• M71: 39,848,983 km (0.088 R)
• M72: 41,201,946 km (0.087 R)
• M73: 41,338,080 km (0.054 R)
• M74: 41,474,364 km (0.11 R)
• M75: 43,328,779 km (0.097 R)
• M76: 45,490,917 km (0.034 R)
• M77: 46,337,342 km (0.119 R)
• M78: 46,620,680 km (0.06 R)
• M79: 46,975,527 km (0.071 R)
• M80: 47,331,420 km (0.103 R)
• M81: 47,473,987 km (0.072 R)
• M82: 47,688,061 km (0.073 R)

Planet 7 - Ice Giant

Semi-Major Axis: 9.79 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 822.4

Radius: 7.8

Gravity: 13.52 G

Time & Orbit

Eccentricity (e): 0.046

Orbit Range: 9.34 AU - 10.24 AU

Year: 19778 Days

Day: 17 Hours

Environment

Temp: -240 °C

Axial Tilt: 48.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (89)

Outer Limit: 80,270,721 km

• M1: 154,385 km (0.12 R)
• M2: 259,253 km (0.11 R)
• M3: 513,569 km (0.072 R)
• M4: 738,415 km (0.048 R)
• M5: 837,000 km (0.102 R)
• M6: 2,670,472 km (0.1 R)
• M7: 2,824,857 km (0.095 R)
• M8: 3,305,515 km (0.028 R)
• M9: 3,555,493 km (0.102 R)
• M10: 3,725,585 km (0.103 R)
• M11: 4,073,849 km (0.029 R)
• M12: 4,569,617 km (0.061 R)
• M13: 4,661,769 km (0.061 R)
• M14: 4,848,168 km (0.091 R)
• M15: 5,373,107 km (0.099 R)
• M16: 6,528,301 km (0.063 R)
• M17: 7,538,536 km (0.107 R)
• M18: 8,426,549 km (0.104 R)
• M19: 8,653,638 km (0.067 R)
• M20: 9,347,324 km (0.072 R)
• M21: 10,058,662 km (0.11 R)
• M22: 11,158,056 km (0.105 R)
• M23: 11,407,586 km (0.114 R)
• M24: 12,295,299 km (0.114 R)
• M25: 12,488,430 km (0.09 R)
• M26: 13,270,827 km (0.034 R)
• M27: 13,734,581 km (0.038 R)
• M28: 14,814,528 km (0.082 R)
• M29: 15,364,749 km (0.069 R)
• M30: 17,055,055 km (0.079 R)
• M31: 17,126,712 km (0.069 R)
• M32: 18,581,701 km (0.07 R)
• M33: 19,249,356 km (0.111 R)
• M34: 19,623,650 km (0.092 R)
• M35: 20,227,577 km (0.097 R)
• M36: 20,303,573 km (0.115 R)
• M37: 21,067,868 km (0.111 R)
• M38: 21,221,954 km (0.061 R)
• M39: 23,178,395 km (0.069 R)
• M40: 24,703,396 km (0.071 R)
• M41: 26,177,982 km (0.065 R)
• M42: 27,093,072 km (0.038 R)
• M43: 27,176,697 km (0.091 R)
• M44: 27,765,066 km (0.091 R)
• M45: 29,727,790 km (0.106 R)
• M46: 31,031,685 km (0.086 R)
• M47: 33,425,400 km (0.07 R)
• M48: 35,236,582 km (0.099 R)
• M49: 35,419,390 km (0.092 R)
• M50: 36,338,370 km (0.105 R)
• M51: 37,358,328 km (0.098 R)
• M52: 37,544,877 km (0.075 R)
• M53: 37,731,575 km (0.064 R)
• M54: 38,481,808 km (0.088 R)
• M55: 40,378,709 km (0.09 R)
• M56: 41,724,492 km (0.119 R)
• M57: 43,280,609 km (0.096 R)
• M58: 43,476,432 km (0.094 R)
• M59: 43,770,841 km (0.052 R)
• M60: 47,960,180 km (0.118 R)
• M61: 48,365,740 km (0.055 R)
• M62: 48,772,496 km (0.028 R)
• M63: 50,720,111 km (0.065 R)
• M64: 51,340,344 km (0.043 R)
• M65: 52,067,240 km (0.046 R)
• M66: 56,927,675 km (0.078 R)
• M67: 58,327,312 km (0.053 R)
• M68: 59,085,624 km (0.066 R)
• M69: 60,831,281 km (0.103 R)
• M70: 62,262,035 km (0.089 R)
• M71: 62,593,694 km (0.114 R)
• M72: 63,147,954 km (0.059 R)
• M73: 64,932,357 km (0.072 R)
• M74: 67,186,049 km (0.05 R)
• M75: 67,299,444 km (0.108 R)
• M76: 68,322,544 km (0.071 R)
• M77: 68,550,531 km (0.04 R)
• M78: 68,664,675 km (0.077 R)
• M79: 69,007,403 km (0.059 R)
• M80: 71,538,151 km (0.097 R)
• M81: 71,769,728 km (0.086 R)
• M82: 73,047,892 km (0.097 R)
• M83: 73,281,115 km (0.118 R)
• M84: 75,037,843 km (0.064 R)
• M85: 77,758,580 km (0.025 R)
• M86: 79,071,151 km (0.058 R)
• M87: 79,190,830 km (0.075 R)
• M88: 79,310,508 km (0.108 R)
• M89: 79,670,141 km (0.083 R)

Kuiper Belt

Range: 30 - 47 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 299 - 10,313 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit