🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Inner (Hot)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.6

Radius: 1.47

Gravity: 1.2 G

Time & Orbit

Eccentricity (e): 0.246

Orbit Range: 0.42 AU - 0.7 AU

Year: 152 Days

Day: 38.6 Hours

Environment

Temp: 218 °C

Axial Tilt: 13.6 °

Atmosphere: Dense CO₂

Biome: Volcanic/Barren

Satellites (1)

Outer Limit: 72,709,877 km

• M1: 348,862 km (0.071 R)

Planet 2 - Terrestrial

Semi-Major Axis: 1.08 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.35

Radius: 1.62

Gravity: 1.28 G

Time & Orbit

Eccentricity (e): 0.045

Orbit Range: 1.03 AU - 1.13 AU

Year: 406 Days

Day: 19.4 Hours

Environment

Temp: 36 °C

Axial Tilt: 35.8 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Satellites (1)

Outer Limit: 72,709,877 km

• M1: 762,500 km (0.119 R)

Planet 3 - Terrestrial

Semi-Major Axis: 1.13 AU

Status: HZ

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.66

Radius: 1.68

Gravity: 1.3 G

Time & Orbit

Eccentricity (e): 0.177

Orbit Range: 0.93 AU - 1.33 AU

Year: 434 Days

Day: 40.5 Hours

Environment

Temp: 12 °C

Axial Tilt: 21.4 °

Atmosphere: N₂, O₂

Biome: Arid/Tundra

Asteroid Belt

Center: 3.32 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 5.51 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 64

Radius: 8.1

Gravity: 0.98 G

Time & Orbit

Eccentricity (e): 0.123

Orbit Range: 4.83 AU - 6.19 AU

Year: 4678 Days

Day: 7.3 Hours

Environment

Temp: -152 °C

Axial Tilt: 26.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (51)

Outer Limit: 72,709,877 km

• M1: 237,561 km (0.057 R)
• M2: 326,273 km (0.106 R)
• M3: 451,935 km (0.09 R)
• M4: 549,623 km (0.114 R)
• M5: 1,028,485 km (0.086 R)
• M6: 1,085,632 km (0.065 R)
• M7: 1,160,879 km (0.096 R)
• M8: 1,229,246 km (0.077 R)
• M9: 1,461,122 km (0.093 R)
• M10: 1,535,323 km (0.116 R)
• M11: 1,805,048 km (0.072 R)
• M12: 2,465,971 km (0.036 R)
• M13: 2,611,081 km (0.058 R)
• M14: 2,945,133 km (0.052 R)
• M15: 3,087,251 km (0.035 R)
• M16: 3,171,325 km (0.043 R)
• M17: 3,440,302 km (0.114 R)
• M18: 3,514,952 km (0.073 R)
• M19: 3,961,352 km (0.066 R)
• M20: 4,092,250 km (0.068 R)
• M21: 4,224,644 km (0.084 R)
• M22: 4,575,301 km (0.067 R)
• M23: 4,726,395 km (0.081 R)
• M24: 4,795,809 km (0.114 R)
• M25: 5,076,305 km (0.094 R)
• M26: 5,175,787 km (0.068 R)
• M27: 5,275,868 km (0.077 R)
• M28: 5,507,146 km (0.096 R)
• M29: 6,145,032 km (0.11 R)
• M30: 6,266,356 km (0.118 R)
• M31: 6,681,639 km (0.086 R)
• M32: 6,759,430 km (0.044 R)
• M33: 6,884,793 km (0.103 R)
• M34: 7,313,092 km (0.085 R)
• M35: 7,377,269 km (0.07 R)
• M36: 7,571,148 km (0.055 R)
• M37: 7,864,809 km (0.092 R)
• M38: 7,930,632 km (0.081 R)
• M39: 8,095,938 km (0.069 R)
• M40: 8,973,927 km (0.047 R)
• M41: 9,146,115 km (0.064 R)
• M42: 9,319,499 km (0.067 R)
• M43: 9,917,142 km (0.106 R)
• M44: 10,238,628 km (0.092 R)
• M45: 10,563,554 km (0.069 R)
• M46: 10,727,215 km (0.041 R)
• M47: 11,334,731 km (0.105 R)
• M48: 11,483,731 km (0.06 R)
• M49: 11,877,772 km (0.075 R)
• M50: 12,448,488 km (0.118 R)
• M51: 12,950,388 km (0.109 R)

Planet 5 - Gas Giant

Semi-Major Axis: 7.01 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 832.6

Radius: 9.4

Gravity: 9.42 G

Time & Orbit

Eccentricity (e): 0.172

Orbit Range: 5.8 AU - 8.22 AU

Year: 6712 Days

Day: 11.1 Hours

Environment

Temp: -159 °C

Axial Tilt: 4.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (86)

Outer Limit: 72,709,877 km

• M1: 181,612 km (0.102 R)
• M2: 262,245 km (0.118 R)
• M3: 417,976 km (0.077 R)
• M4: 502,649 km (0.062 R)
• M5: 1,225,805 km (0.077 R)
• M6: 1,298,061 km (0.099 R)
• M7: 1,428,211 km (0.075 R)
• M8: 1,523,954 km (0.101 R)
• M9: 1,621,791 km (0.119 R)
• M10: 1,701,676 km (0.064 R)
• M11: 1,783,057 km (0.112 R)
• M12: 1,970,802 km (0.111 R)
• M13: 2,099,606 km (0.037 R)
• M14: 2,231,252 km (0.1 R)
• M15: 2,572,485 km (0.115 R)
• M16: 2,666,283 km (0.084 R)
• M17: 2,785,213 km (0.099 R)
• M18: 3,202,890 km (0.057 R)
• M19: 4,514,265 km (0.1 R)
• M20: 5,300,402 km (0.058 R)
• M21: 5,878,897 km (0.061 R)
• M22: 6,034,479 km (0.089 R)
• M23: 6,445,424 km (0.076 R)
• M24: 6,832,733 km (0.105 R)
• M25: 7,128,339 km (0.082 R)
• M26: 7,294,243 km (0.117 R)
• M27: 7,936,765 km (0.098 R)
• M28: 8,108,953 km (0.087 R)
• M29: 8,491,923 km (0.067 R)
• M30: 8,668,000 km (0.077 R)
• M31: 9,203,560 km (0.1 R)
• M32: 9,493,481 km (0.052 R)
• M33: 9,602,987 km (0.073 R)
• M34: 9,934,047 km (0.108 R)
• M35: 11,026,410 km (0.079 R)
• M36: 11,489,565 km (0.086 R)
• M37: 11,840,971 km (0.119 R)
• M38: 11,998,348 km (0.111 R)
• M39: 13,404,867 km (0.088 R)
• M40: 13,733,533 km (0.045 R)
• M41: 13,981,866 km (0.043 R)
• M42: 14,567,093 km (0.072 R)
• M43: 15,075,127 km (0.114 R)
• M44: 15,631,930 km (0.098 R)
• M45: 15,934,716 km (0.074 R)
• M46: 16,021,483 km (0.097 R)
• M47: 16,152,082 km (0.101 R)
• M48: 16,986,988 km (0.101 R)
• M49: 17,253,571 km (0.09 R)
• M50: 18,333,817 km (0.093 R)
• M51: 19,343,154 km (0.087 R)
• M52: 19,528,656 km (0.102 R)
• M53: 19,901,304 km (0.033 R)
• M54: 20,748,477 km (0.107 R)
• M55: 21,463,554 km (0.097 R)
• M56: 21,655,489 km (0.058 R)
• M57: 22,041,301 km (0.094 R)
• M58: 22,186,561 km (0.113 R)
• M59: 22,868,578 km (0.064 R)
• M60: 23,507,959 km (0.071 R)
• M61: 24,503,383 km (0.083 R)
• M62: 25,410,844 km (0.079 R)
• M63: 25,512,271 km (0.079 R)
• M64: 26,586,384 km (0.118 R)
• M65: 26,999,424 km (0.069 R)
• M66: 27,102,945 km (0.107 R)
• M67: 27,675,157 km (0.119 R)
• M68: 28,251,259 km (0.068 R)
• M69: 28,567,209 km (0.026 R)
• M70: 28,831,399 km (0.105 R)
• M71: 29,149,444 km (0.095 R)
• M72: 29,308,916 km (0.092 R)
• M73: 29,896,087 km (0.07 R)
• M74: 30,649,013 km (0.071 R)
• M75: 30,811,177 km (0.107 R)
• M76: 30,919,486 km (0.092 R)
• M77: 31,408,223 km (0.06 R)
• M78: 32,063,910 km (0.095 R)
• M79: 32,393,474 km (0.101 R)
• M80: 33,555,700 km (0.079 R)
• M81: 34,169,949 km (0.066 R)
• M82: 34,844,186 km (0.042 R)
• M83: 36,491,857 km (0.091 R)
• M84: 37,065,864 km (0.094 R)
• M85: 37,527,374 km (0.039 R)
• M86: 38,106,766 km (0.112 R)

Planet 6 - Gas Giant

Semi-Major Axis: 10.81 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 263.2

Radius: 10.2

Gravity: 2.53 G

Time & Orbit

Eccentricity (e): 0.125

Orbit Range: 9.46 AU - 12.16 AU

Year: 12854 Days

Day: 6.5 Hours

Environment

Temp: -177 °C

Axial Tilt: 36.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (83)

Outer Limit: 72,709,877 km

• M1: 167,849 km (0.105 R)
• M2: 480,359 km (0.047 R)
• M3: 585,975 km (0.059 R)
• M4: 807,380 km (0.027 R)
• M5: 1,056,161 km (0.1 R)
• M6: 1,217,278 km (0.115 R)
• M7: 1,625,082 km (0.037 R)
• M8: 1,749,397 km (0.11 R)
• M9: 1,963,622 km (0.076 R)
• M10: 2,324,452 km (0.11 R)
• M11: 2,536,581 km (0.118 R)
• M12: 2,657,307 km (0.103 R)
• M13: 2,954,857 km (0.072 R)
• M14: 3,030,853 km (0.099 R)
• M15: 3,394,824 km (0.119 R)
• M16: 3,474,560 km (0.079 R)
• M17: 3,555,044 km (0.117 R)
• M18: 3,690,579 km (0.077 R)
• M19: 4,050,811 km (0.061 R)
• M20: 4,135,633 km (0.109 R)
• M21: 4,480,755 km (0.079 R)
• M22: 4,656,832 km (0.08 R)
• M23: 4,835,302 km (0.079 R)
• M24: 5,107,271 km (0.084 R)
• M25: 5,984,962 km (0.094 R)
• M26: 6,049,439 km (0.095 R)
• M27: 6,146,677 km (0.063 R)
• M28: 6,606,990 km (0.084 R)
• M29: 6,673,711 km (0.092 R)
• M30: 7,010,605 km (0.078 R)
• M31: 7,112,631 km (0.098 R)
• M32: 7,387,592 km (0.114 R)
• M33: 7,526,269 km (0.086 R)
• M34: 8,557,896 km (0.056 R)
• M35: 8,667,102 km (0.095 R)
• M36: 8,997,714 km (0.074 R)
• M37: 9,145,965 km (0.112 R)
• M38: 10,360,999 km (0.079 R)
• M39: 10,908,527 km (0.079 R)
• M40: 11,225,675 km (0.108 R)
• M41: 11,545,814 km (0.111 R)
• M42: 12,072,399 km (0.081 R)
• M43: 13,023,392 km (0.082 R)
• M44: 14,429,612 km (0.054 R)
• M45: 14,908,924 km (0.073 R)
• M46: 15,216,796 km (0.027 R)
• M47: 15,749,365 km (0.098 R)
• M48: 15,973,013 km (0.08 R)
• M49: 16,333,245 km (0.065 R)
• M50: 17,568,325 km (0.046 R)
• M51: 17,707,451 km (0.096 R)
• M52: 17,940,076 km (0.068 R)
• M53: 18,267,546 km (0.04 R)
• M54: 18,408,467 km (0.1 R)
• M55: 18,549,687 km (0.088 R)
• M56: 18,833,474 km (0.033 R)
• M57: 19,405,088 km (0.06 R)
• M58: 20,565,518 km (0.048 R)
• M59: 20,957,166 km (0.104 R)
• M60: 21,055,601 km (0.089 R)
• M61: 21,252,771 km (0.106 R)
• M62: 21,549,573 km (0.113 R)
• M63: 21,748,239 km (0.086 R)
• M64: 23,155,806 km (0.084 R)
• M65: 23,819,422 km (0.098 R)
• M66: 24,334,038 km (0.067 R)
• M67: 26,429,157 km (0.09 R)
• M68: 26,641,885 km (0.094 R)
• M69: 28,200,844 km (0.101 R)
• M70: 30,622,086 km (0.086 R)
• M71: 32,481,438 km (0.047 R)
• M72: 32,994,858 km (0.068 R)
• M73: 33,223,892 km (0.107 R)
• M74: 34,029,626 km (0.119 R)
• M75: 35,367,480 km (0.065 R)
• M76: 35,660,542 km (0.093 R)
• M77: 35,836,768 km (0.111 R)
• M78: 36,249,210 km (0.099 R)
• M79: 36,603,906 km (0.113 R)
• M80: 36,841,019 km (0.12 R)
• M81: 37,854,395 km (0.113 R)
• M82: 38,756,320 km (0.046 R)
• M83: 39,786,900 km (0.12 R)

Planet 7 - Ice Giant

Semi-Major Axis: 12.77 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 496.7

Radius: 3.6

Gravity: 38.33 G

Time & Orbit

Eccentricity (e): 0.065

Orbit Range: 11.94 AU - 13.6 AU

Year: 16504 Days

Day: 21.9 Hours

Environment

Temp: -194 °C

Axial Tilt: 32.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 72,709,877 km

• M1: 87,814 km (0.114 R)
• M2: 178,021 km (0.12 R)
• M3: 214,673 km (0.114 R)
• M4: 282,291 km (0.103 R)
• M5: 438,322 km (0.092 R)
• M6: 525,537 km (0.119 R)
• M7: 716,574 km (0.097 R)
• M8: 927,956 km (0.068 R)
• M9: 994,975 km (0.101 R)
• M10: 1,379,143 km (0.116 R)
• M11: 2,861,508 km (0.115 R)
• M12: 3,125,399 km (0.108 R)
• M13: 3,192,718 km (0.1 R)
• M14: 3,926,944 km (0.081 R)
• M15: 4,256,957 km (0.09 R)
• M16: 5,379,390 km (0.101 R)
• M17: 5,500,564 km (0.089 R)
• M18: 5,663,327 km (0.103 R)
• M19: 5,869,173 km (0.03 R)
• M20: 6,587,093 km (0.064 R)
• M21: 6,760,029 km (0.056 R)
• M22: 7,511,459 km (0.072 R)
• M23: 7,556,488 km (0.097 R)
• M24: 7,782,979 km (0.118 R)
• M25: 8,242,543 km (0.1 R)
• M26: 8,475,617 km (0.115 R)
• M27: 8,710,934 km (0.12 R)
• M28: 8,948,346 km (0.083 R)
• M29: 9,043,939 km (0.096 R)
• M30: 9,771,434 km (0.074 R)
• M31: 10,018,121 km (0.12 R)
• M32: 10,366,833 km (0.054 R)
• M33: 10,821,012 km (0.055 R)
• M34: 10,922,889 km (0.094 R)
• M35: 11,333,385 km (0.098 R)
• M36: 11,384,996 km (0.079 R)
• M37: 11,540,429 km (0.104 R)
• M38: 12,434,575 km (0.087 R)
• M39: 13,079,192 km (0.077 R)
• M40: 13,241,955 km (0.114 R)
• M41: 14,177,241 km (0.1 R)
• M42: 14,400,291 km (0.047 R)
• M43: 14,512,340 km (0.076 R)
• M44: 15,418,753 km (0.111 R)
• M45: 15,705,832 km (0.085 R)
• M46: 16,110,494 km (0.089 R)
• M47: 16,871,349 km (0.075 R)
• M48: 17,285,735 km (0.089 R)
• M49: 18,245,704 km (0.105 R)
• M50: 19,222,878 km (0.117 R)
• M51: 19,531,648 km (0.088 R)
• M52: 19,593,581 km (0.104 R)
• M53: 19,966,678 km (0.078 R)
• M54: 20,091,592 km (0.093 R)
• M55: 23,560,617 km (0.113 R)
• M56: 25,769,580 km (0.095 R)
• M57: 26,864,187 km (0.107 R)
• M58: 27,140,195 km (0.085 R)
• M59: 27,904,042 km (0.077 R)
• M60: 29,310,860 km (0.09 R)
• M61: 29,666,155 km (0.081 R)
• M62: 30,165,962 km (0.108 R)
• M63: 32,486,075 km (0.059 R)
• M64: 32,927,539 km (0.096 R)
• M65: 34,712,840 km (0.092 R)
• M66: 35,314,821 km (0.026 R)
• M67: 36,224,376 km (0.119 R)
• M68: 36,300,522 km (0.077 R)
• M69: 37,295,198 km (0.08 R)
• M70: 38,453,983 km (0.091 R)
• M71: 39,232,939 km (0.092 R)
• M72: 39,467,808 km (0.114 R)
• M73: 42,240,604 km (0.097 R)
• M74: 42,802,644 km (0.089 R)
• M75: 43,367,226 km (0.092 R)
• M76: 44,993,804 km (0.106 R)
• M77: 45,403,552 km (0.092 R)
• M78: 45,814,497 km (0.051 R)
• M79: 47,137,840 km (0.109 R)
• M80: 48,809,746 km (0.072 R)
• M81: 50,671,043 km (0.107 R)
• M82: 50,756,164 km (0.065 R)
• M83: 53,332,987 km (0.088 R)
• M84: 53,766,672 km (0.093 R)
• M85: 56,392,563 km (0.093 R)
• M86: 56,657,501 km (0.071 R)
• M87: 58,344,666 km (0.109 R)
• M88: 59,778,262 km (0.081 R)
• M89: 59,958,228 km (0.101 R)
• M90: 60,048,286 km (0.07 R)
• M91: 60,138,494 km (0.086 R)

Planet 8 - Ice Giant

Semi-Major Axis: 13.5 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 743

Radius: 4

Gravity: 46.44 G

Time & Orbit

Eccentricity (e): 0.105

Orbit Range: 12.08 AU - 14.92 AU

Year: 17939 Days

Day: 20.5 Hours

Environment

Temp: -193 °C

Axial Tilt: 36.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (95)

Outer Limit: 72,709,877 km

• M1: 68,067 km (0.119 R)
• M2: 1,064,688 km (0.041 R)
• M3: 1,338,153 km (0.083 R)
• M4: 1,366,726 km (0.115 R)
• M5: 1,602,193 km (0.109 R)
• M6: 2,044,405 km (0.12 R)
• M7: 2,451,610 km (0.06 R)
• M8: 2,486,765 km (0.039 R)
• M9: 2,628,584 km (0.078 R)
• M10: 2,773,245 km (0.07 R)
• M11: 2,920,450 km (0.108 R)
• M12: 3,978,855 km (0.111 R)
• M13: 5,506,398 km (0.107 R)
• M14: 6,067,390 km (0.107 R)
• M15: 6,548,647 km (0.12 R)
• M16: 6,744,620 km (0.12 R)
• M17: 7,394,623 km (0.098 R)
• M18: 7,701,298 km (0.116 R)
• M19: 8,753,420 km (0.111 R)
• M20: 9,794,023 km (0.115 R)
• M21: 10,471,103 km (0.076 R)
• M22: 11,397,114 km (0.083 R)
• M23: 12,349,005 km (0.1 R)
• M24: 13,264,394 km (0.116 R)
• M25: 13,512,128 km (0.111 R)
• M26: 14,075,215 km (0.119 R)
• M27: 16,006,673 km (0.088 R)
• M28: 16,270,414 km (0.12 R)
• M29: 18,019,363 km (0.064 R)
• M30: 18,362,540 km (0.112 R)
• M31: 18,569,434 km (0.101 R)
• M32: 19,264,765 km (0.063 R)
• M33: 19,334,777 km (0.065 R)
• M34: 20,680,858 km (0.038 R)
• M35: 21,040,043 km (0.068 R)
• M36: 21,112,149 km (0.099 R)
• M37: 21,184,255 km (0.106 R)
• M38: 22,350,221 km (0.115 R)
• M39: 22,940,833 km (0.075 R)
• M40: 23,611,630 km (0.081 R)
• M41: 23,986,971 km (0.099 R)
• M42: 24,440,103 km (0.055 R)
• M43: 26,435,739 km (0.073 R)
• M44: 29,283,933 km (0.108 R)
• M45: 29,364,416 km (0.103 R)
• M46: 31,318,314 km (0.106 R)
• M47: 31,400,743 km (0.095 R)
• M48: 31,648,028 km (0.118 R)
• M49: 32,227,869 km (0.113 R)
• M50: 32,644,051 km (0.096 R)
• M51: 34,157,383 km (0.112 R)
• M52: 34,581,792 km (0.053 R)
• M53: 35,607,435 km (0.114 R)
• M54: 36,469,717 km (0.077 R)
• M55: 39,275,126 km (0.106 R)
• M56: 39,541,560 km (0.055 R)
• M57: 41,063,269 km (0.083 R)
• M58: 41,695,470 km (0.045 R)
• M59: 43,611,070 km (0.085 R)
• M60: 44,996,796 km (0.069 R)
• M61: 45,741,793 km (0.104 R)
• M62: 45,928,641 km (0.088 R)
• M63: 46,115,788 km (0.098 R)
• M64: 46,303,084 km (0.099 R)
• M65: 46,866,769 km (0.05 R)
• M66: 48,001,020 km (0.057 R)
• M67: 48,190,860 km (0.063 R)
• M68: 48,953,061 km (0.084 R)
• M69: 50,392,641 km (0.11 R)
• M70: 51,069,272 km (0.106 R)
• M71: 51,166,212 km (0.107 R)
• M72: 51,651,657 km (0.096 R)
• M73: 51,943,672 km (0.064 R)
• M74: 53,313,540 km (0.076 R)
• M75: 53,608,547 km (0.106 R)
• M76: 54,893,592 km (0.089 R)
• M77: 57,292,394 km (0.092 R)
• M78: 61,674,864 km (0.086 R)
• M79: 61,984,681 km (0.098 R)
• M80: 62,709,483 km (0.09 R)
• M81: 63,541,247 km (0.097 R)
• M82: 64,481,320 km (0.11 R)
• M83: 64,586,038 km (0.094 R)
• M84: 65,110,528 km (0.069 R)
• M85: 66,269,613 km (0.081 R)
• M86: 66,375,229 km (0.092 R)
• M87: 67,116,785 km (0.104 R)
• M88: 67,967,399 km (0.096 R)
• M89: 68,821,752 km (0.117 R)
• M90: 70,109,940 km (0.096 R)
• M91: 70,864,960 km (0.063 R)
• M92: 71,514,215 km (0.099 R)
• M93: 71,839,740 km (0.049 R)
• M94: 72,056,956 km (0.034 R)
• M95: 72,383,079 km (0.053 R)

Kuiper Belt

Range: 30.3 - 50.3 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 454 - 16,089 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit