🌌 Stone's Star System Generator

Planet 1 - Terrestrial

Semi-Major Axis: 0.51 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 3.97

Radius: 1.74

Gravity: 1.31 G

Time & Orbit

Eccentricity (e): 0.039

Orbit Range: 0.49 AU - 0.53 AU

Year: 239 Days

Day: 24.7 Hours

Environment

Temp: -120 °C

Axial Tilt: 23.8 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 0.39

Radius: 0.69

Gravity: 0.82 G

Time & Orbit

Eccentricity (e): 0.142

Orbit Range: 0.48 AU - 0.64 AU

Year: 275 Days

Day: 39.2 Hours

Environment

Temp: -122 °C

Axial Tilt: 3.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 3 - Terrestrial

Semi-Major Axis: 0.58 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 4.79

Radius: 1.87

Gravity: 1.37 G

Time & Orbit

Eccentricity (e): 0.225

Orbit Range: 0.45 AU - 0.71 AU

Year: 290 Days

Day: 30 Hours

Environment

Temp: -117 °C

Axial Tilt: 19.9 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Asteroid Belt

Center: 0.86 AU

Composition

Type: Main (Rocky/Icy Mix)

A dense region of planetesimals and debris.

Boundary

Planet 4 - Gas Giant

Semi-Major Axis: 1.14 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 394

Radius: 13.9

Gravity: 2.04 G

Time & Orbit

Eccentricity (e): 0.063

Orbit Range: 1.07 AU - 1.21 AU

Year: 798 Days

Day: 8.6 Hours

Environment

Temp: -163 °C

Axial Tilt: 36.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (46)

Outer Limit: 44,774,790 km

• M1: 175,478 km (0.091 R)
• M2: 306,526 km (0.107 R)
• M3: 397,781 km (0.119 R)
• M4: 499,657 km (0.067 R)
• M5: 643,570 km (0.103 R)
• M6: 770,728 km (0.091 R)
• M7: 857,645 km (0.025 R)
• M8: 1,102,387 km (0.105 R)
• M9: 1,196,933 km (0.105 R)
• M10: 1,294,470 km (0.093 R)
• M11: 1,382,883 km (0.091 R)
• M12: 1,597,705 km (0.08 R)
• M13: 1,857,258 km (0.115 R)
• M14: 1,985,463 km (0.11 R)
• M15: 2,102,748 km (0.058 R)
• M16: 2,521,173 km (0.108 R)
• M17: 2,611,081 km (0.086 R)
• M18: 2,864,201 km (0.073 R)
• M19: 2,974,006 km (0.045 R)
• M20: 3,085,306 km (0.097 R)
• M21: 3,295,791 km (0.06 R)
• M22: 3,427,736 km (0.108 R)
• M23: 3,586,759 km (0.073 R)
• M24: 3,774,055 km (0.118 R)
• M25: 3,938,463 km (0.114 R)
• M26: 4,131,893 km (0.076 R)
• M27: 4,247,682 km (0.099 R)
• M28: 4,373,494 km (0.086 R)
• M29: 4,537,303 km (0.106 R)
• M30: 4,656,832 km (0.115 R)
• M31: 4,786,833 km (0.104 R)
• M32: 5,022,001 km (0.081 R)
• M33: 5,232,036 km (0.11 R)
• M34: 5,435,489 km (0.111 R)
• M35: 5,621,738 km (0.119 R)
• M36: 5,820,105 km (0.092 R)
• M37: 6,061,107 km (0.116 R)
• M38: 6,162,684 km (0.054 R)
• M39: 6,274,883 km (0.093 R)
• M40: 6,387,829 km (0.09 R)
• M41: 6,532,640 km (0.09 R)
• M42: 6,751,950 km (0.045 R)
• M43: 6,857,118 km (0.037 R)
• M44: 6,994,748 km (0.087 R)
• M45: 7,112,032 km (0.087 R)
• M46: 7,208,373 km (0.076 R)

Planet 5 - Gas Giant

Semi-Major Axis: 1.43 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 118.4

Radius: 12.6

Gravity: 0.75 G

Time & Orbit

Eccentricity (e): 0.031

Orbit Range: 1.39 AU - 1.47 AU

Year: 1122 Days

Day: 6.3 Hours

Environment

Temp: -182 °C

Axial Tilt: 18 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (43)

Outer Limit: 44,774,790 km

• M1: 162,762 km (0.082 R)
• M2: 241,301 km (0.077 R)
• M3: 320,139 km (0.117 R)
• M4: 417,827 km (0.046 R)
• M5: 544,087 km (0.104 R)
• M6: 646,263 km (0.066 R)
• M7: 789,877 km (0.108 R)
• M8: 895,343 km (0.074 R)
• M9: 1,068,129 km (0.088 R)
• M10: 1,201,570 km (0.101 R)
• M11: 1,288,786 km (0.085 R)
• M12: 1,602,941 km (0.107 R)
• M13: 1,688,212 km (0.1 R)
• M14: 1,822,252 km (0.088 R)
• M15: 1,947,764 km (0.07 R)
• M16: 2,063,852 km (0.112 R)
• M17: 2,252,196 km (0.099 R)
• M18: 2,368,134 km (0.099 R)
• M19: 2,659,701 km (0.068 R)
• M20: 2,796,283 km (0.111 R)
• M21: 2,879,310 km (0.082 R)
• M22: 3,033,845 km (0.063 R)
• M23: 3,155,169 km (0.102 R)
• M24: 3,373,282 km (0.117 R)
• M25: 3,461,844 km (0.086 R)
• M26: 3,596,333 km (0.096 R)
• M27: 3,686,989 km (0.08 R)
• M28: 3,801,431 km (0.119 R)
• M29: 3,971,375 km (0.097 R)
• M30: 4,104,517 km (0.065 R)
• M31: 4,207,291 km (0.09 R)
• M32: 4,367,211 km (0.091 R)
• M33: 4,480,307 km (0.073 R)
• M34: 4,578,144 km (0.114 R)
• M35: 4,809,123 km (0.034 R)
• M36: 5,154,245 km (0.106 R)
• M37: 5,308,331 km (0.1 R)
• M38: 5,412,002 km (0.108 R)
• M39: 5,665,122 km (0.106 R)
• M40: 5,806,492 km (0.104 R)
• M41: 5,886,527 km (0.109 R)
• M42: 6,020,866 km (0.106 R)
• M43: 6,201,430 km (0.082 R)

Planet 6 - Gas Giant

Semi-Major Axis: 1.69 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 698.8

Radius: 8.1

Gravity: 10.65 G

Time & Orbit

Eccentricity (e): 0.208

Orbit Range: 1.34 AU - 2.04 AU

Year: 1441 Days

Day: 14.6 Hours

Environment

Temp: -193 °C

Axial Tilt: 39.1 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (75)

Outer Limit: 44,774,790 km

• M1: 104,120 km (0.103 R)
• M2: 159,172 km (0.036 R)
• M3: 218,114 km (0.116 R)
• M4: 299,046 km (0.115 R)
• M5: 529,576 km (0.108 R)
• M6: 661,671 km (0.115 R)
• M7: 782,846 km (0.058 R)
• M8: 904,020 km (0.12 R)
• M9: 1,015,321 km (0.081 R)
• M10: 1,131,259 km (0.081 R)
• M11: 1,199,476 km (0.092 R)
• M12: 1,385,575 km (0.067 R)
• M13: 1,505,553 km (0.109 R)
• M14: 1,571,675 km (0.059 R)
• M15: 1,706,762 km (0.058 R)
• M16: 2,019,870 km (0.078 R)
• M17: 2,263,715 km (0.098 R)
• M18: 2,328,940 km (0.112 R)
• M19: 2,472,404 km (0.045 R)
• M20: 2,676,007 km (0.102 R)
• M21: 2,779,828 km (0.08 R)
• M22: 2,849,839 km (0.09 R)
• M23: 2,979,690 km (0.098 R)
• M24: 3,282,177 km (0.11 R)
• M25: 3,381,061 km (0.053 R)
• M26: 3,443,294 km (0.079 R)
• M27: 3,543,824 km (0.098 R)
• M28: 3,658,117 km (0.104 R)
• M29: 3,851,397 km (0.098 R)
• M30: 3,942,652 km (0.045 R)
• M31: 4,034,655 km (0.074 R)
• M32: 4,127,405 km (0.08 R)
• M33: 4,315,151 km (0.114 R)
• M34: 4,396,532 km (0.106 R)
• M35: 4,505,738 km (0.069 R)
• M36: 4,615,842 km (0.071 R)
• M37: 4,838,743 km (0.051 R)
• M38: 5,008,238 km (0.098 R)
• M39: 5,079,446 km (0.036 R)
• M40: 5,165,465 km (0.094 R)
• M41: 5,309,677 km (0.092 R)
• M42: 5,411,553 km (0.045 R)
• M43: 5,470,046 km (0.114 R)
• M44: 6,081,453 km (0.106 R)
• M45: 6,172,707 km (0.064 R)
• M46: 6,464,872 km (0.083 R)
• M47: 6,573,630 km (0.057 R)
• M48: 6,872,077 km (0.106 R)
• M49: 7,014,943 km (0.072 R)
• M50: 7,190,870 km (0.067 R)
• M51: 7,287,511 km (0.118 R)
• M52: 7,417,062 km (0.066 R)
• M53: 7,859,723 km (0.118 R)
• M54: 7,959,205 km (0.108 R)
• M55: 8,059,136 km (0.116 R)
• M56: 8,142,762 km (0.095 R)
• M57: 8,243,591 km (0.112 R)
• M58: 8,361,623 km (0.083 R)
• M59: 8,497,159 km (0.104 R)
• M60: 8,616,538 km (0.093 R)
• M61: 8,787,828 km (0.115 R)
• M62: 9,064,285 km (0.084 R)
• M63: 9,396,392 km (0.112 R)
• M64: 9,803,747 km (0.12 R)
• M65: 9,928,811 km (0.115 R)
• M66: 9,982,666 km (0.077 R)
• M67: 10,072,425 km (0.045 R)
• M68: 10,162,632 km (0.086 R)
• M69: 10,985,869 km (0.117 R)
• M70: 12,020,937 km (0.105 R)
• M71: 12,078,233 km (0.026 R)
• M72: 12,154,977 km (0.068 R)
• M73: 12,231,720 km (0.102 R)
• M74: 12,443,700 km (0.041 R)
• M75: 13,047,627 km (0.054 R)

Planet 7 - Gas Giant

Semi-Major Axis: 2.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 459.3

Radius: 10.5

Gravity: 4.17 G

Time & Orbit

Eccentricity (e): 0.071

Orbit Range: 2 AU - 2.3 AU

Year: 2068 Days

Day: 13.6 Hours

Environment

Temp: -201 °C

Axial Tilt: 7.3 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (67)

Outer Limit: 44,774,790 km

• M1: 149,747 km (0.096 R)
• M2: 238,309 km (0.066 R)
• M3: 308,022 km (0.11 R)
• M4: 435,180 km (0.054 R)
• M5: 549,623 km (0.094 R)
• M6: 697,724 km (0.08 R)
• M7: 851,810 km (0.089 R)
• M8: 1,195,137 km (0.099 R)
• M9: 1,363,435 km (0.079 R)
• M10: 1,560,007 km (0.071 R)
• M11: 1,641,238 km (0.051 R)
• M12: 1,766,003 km (0.093 R)
• M13: 1,937,292 km (0.035 R)
• M14: 2,091,827 km (0.076 R)
• M15: 2,182,035 km (0.096 R)
• M16: 2,413,163 km (0.088 R)
• M17: 2,689,171 km (0.086 R)
• M18: 2,799,874 km (0.055 R)
• M19: 2,962,636 km (0.12 R)
• M20: 3,154,421 km (0.081 R)
• M21: 3,232,212 km (0.071 R)
• M22: 3,536,793 km (0.108 R)
• M23: 3,604,261 km (0.119 R)
• M24: 3,685,792 km (0.106 R)
• M25: 3,961,950 km (0.099 R)
• M26: 4,074,448 km (0.063 R)
• M27: 4,374,541 km (0.097 R)
• M28: 4,447,096 km (0.045 R)
• M29: 4,578,742 km (0.098 R)
• M30: 4,711,735 km (0.048 R)
• M31: 4,890,953 km (0.029 R)
• M32: 5,256,271 km (0.073 R)
• M33: 5,442,221 km (0.092 R)
• M34: 5,788,839 km (0.102 R)
• M35: 6,045,549 km (0.096 R)
• M36: 6,159,094 km (0.12 R)
• M37: 6,586,794 km (0.113 R)
• M38: 6,653,515 km (0.105 R)
• M39: 6,939,396 km (0.11 R)
• M40: 7,007,314 km (0.11 R)
• M41: 7,471,217 km (0.067 R)
• M42: 8,123,015 km (0.106 R)
• M43: 8,266,479 km (0.096 R)
• M44: 8,338,436 km (0.105 R)
• M45: 8,958,818 km (0.075 R)
• M46: 9,330,868 km (0.036 R)
• M47: 9,537,612 km (0.115 R)
• M48: 9,613,159 km (0.108 R)
• M49: 9,783,850 km (0.046 R)
• M50: 10,109,076 km (0.04 R)
• M51: 10,711,357 km (0.09 R)
• M52: 11,066,502 km (0.05 R)
• M53: 11,185,732 km (0.103 R)
• M54: 11,485,676 km (0.116 R)
• M55: 11,889,740 km (0.076 R)
• M56: 11,971,121 km (0.09 R)
• M57: 12,463,298 km (0.047 R)
• M58: 13,045,982 km (0.095 R)
• M59: 13,256,167 km (0.06 R)
• M60: 13,403,969 km (0.12 R)
• M61: 13,679,977 km (0.066 R)
• M62: 13,829,426 km (0.107 R)
• M63: 14,086,734 km (0.087 R)
• M64: 14,194,444 km (0.111 R)
• M65: 14,389,071 km (0.106 R)
• M66: 14,475,838 km (0.073 R)
• M67: 14,649,820 km (0.118 R)

Planet 8 - Gas Giant

Semi-Major Axis: 4.56 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 615.2

Radius: 11

Gravity: 5.08 G

Time & Orbit

Eccentricity (e): 0.199

Orbit Range: 3.65 AU - 5.47 AU

Year: 6388 Days

Day: 7.8 Hours

Environment

Temp: -208 °C

Axial Tilt: 13.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (77)

Outer Limit: 44,774,790 km

• M1: 161,267 km (0.084 R)
• M2: 233,373 km (0.09 R)
• M3: 314,305 km (0.096 R)
• M4: 452,085 km (0.059 R)
• M5: 651,499 km (0.057 R)
• M6: 838,496 km (0.097 R)
• M7: 1,869,225 km (0.091 R)
• M8: 1,945,670 km (0.09 R)
• M9: 2,181,436 km (0.052 R)
• M10: 2,552,588 km (0.068 R)
• M11: 2,637,859 km (0.099 R)
• M12: 2,988,666 km (0.078 R)
• M13: 3,101,313 km (0.098 R)
• M14: 3,284,720 km (0.038 R)
• M15: 3,471,718 km (0.04 R)
• M16: 3,686,241 km (0.079 R)
• M17: 3,831,800 km (0.103 R)
• M18: 4,229,281 km (0.088 R)
• M19: 4,510,226 km (0.029 R)
• M20: 4,744,796 km (0.067 R)
• M21: 4,983,404 km (0.119 R)
• M22: 5,063,738 km (0.107 R)
• M23: 5,252,980 km (0.117 R)
• M24: 5,334,959 km (0.062 R)
• M25: 5,891,613 km (0.046 R)
• M26: 6,850,386 km (0.111 R)
• M27: 6,999,834 km (0.114 R)
• M28: 8,108,205 km (0.116 R)
• M29: 8,554,006 km (0.099 R)
• M30: 9,106,022 km (0.092 R)
• M31: 9,402,974 km (0.087 R)
• M32: 9,837,556 km (0.105 R)
• M33: 10,074,220 km (0.025 R)
• M34: 10,312,828 km (0.112 R)
• M35: 10,484,417 km (0.095 R)
• M36: 10,691,610 km (0.102 R)
• M37: 10,970,012 km (0.057 R)
• M38: 11,498,392 km (0.095 R)
• M39: 11,569,451 km (0.082 R)
• M40: 12,215,863 km (0.091 R)
• M41: 12,397,475 km (0.057 R)
• M42: 13,618,642 km (0.117 R)
• M43: 14,224,514 km (0.118 R)
• M44: 15,149,926 km (0.026 R)
• M45: 15,659,157 km (0.074 R)
• M46: 16,333,694 km (0.083 R)
• M47: 17,058,346 km (0.118 R)
• M48: 17,302,191 km (0.095 R)
• M49: 17,999,466 km (0.065 R)
• M50: 18,082,044 km (0.065 R)
• M51: 19,252,199 km (0.096 R)
• M52: 20,317,485 km (0.118 R)
• M53: 21,401,920 km (0.091 R)
• M54: 21,797,008 km (0.119 R)
• M55: 22,283,052 km (0.067 R)
• M56: 22,549,635 km (0.115 R)
• M57: 22,638,795 km (0.054 R)
• M58: 22,951,605 km (0.119 R)
• M59: 23,491,354 km (0.077 R)
• M60: 24,171,725 km (0.118 R)
• M61: 24,491,415 km (0.111 R)
• M62: 25,181,361 km (0.033 R)
• M63: 25,459,164 km (0.074 R)
• M64: 25,737,865 km (0.079 R)
• M65: 27,194,350 km (0.104 R)
• M66: 27,336,767 km (0.053 R)
• M67: 27,479,334 km (0.085 R)
• M68: 28,436,461 km (0.091 R)
• M69: 28,580,972 km (0.106 R)
• M70: 29,696,973 km (0.105 R)
• M71: 30,235,674 km (0.111 R)
• M72: 30,530,981 km (0.081 R)
• M73: 32,171,920 km (0.117 R)
• M74: 32,876,675 km (0.087 R)
• M75: 33,281,637 km (0.113 R)
• M76: 33,484,791 km (0.025 R)
• M77: 33,841,282 km (0.063 R)

Planet 9 - Ice Giant

Semi-Major Axis: 6.35 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 506.7

Radius: 6.3

Gravity: 12.77 G

Time & Orbit

Eccentricity (e): 0.036

Orbit Range: 6.12 AU - 6.58 AU

Year: 10497 Days

Day: 17.5 Hours

Environment

Temp: -212 °C

Axial Tilt: 0.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (91)

Outer Limit: 44,774,790 km

• M1: 177,423 km (0.115 R)
• M2: 310,565 km (0.076 R)
• M3: 476,918 km (0.104 R)
• M4: 533,765 km (0.117 R)
• M5: 686,654 km (0.104 R)
• M6: 735,274 km (0.034 R)
• M7: 870,959 km (0.109 R)
• M8: 1,089,671 km (0.112 R)
• M9: 1,205,609 km (0.081 R)
• M10: 1,345,932 km (0.075 R)
• M11: 1,387,071 km (0.029 R)
• M12: 1,599,052 km (0.079 R)
• M13: 2,546,305 km (0.101 R)
• M14: 3,046,860 km (0.032 R)
• M15: 3,238,943 km (0.101 R)
• M16: 3,322,419 km (0.078 R)
• M17: 3,577,334 km (0.116 R)
• M18: 3,634,929 km (0.1 R)
• M19: 3,692,674 km (0.073 R)
• M20: 4,565,278 km (0.037 R)
• M21: 5,432,347 km (0.098 R)
• M22: 6,524,113 km (0.099 R)
• M23: 6,700,638 km (0.036 R)
• M24: 7,830,401 km (0.101 R)
• M25: 8,245,236 km (0.116 R)
• M26: 8,744,744 km (0.069 R)
• M27: 8,939,520 km (0.054 R)
• M28: 9,017,760 km (0.089 R)
• M29: 9,175,137 km (0.114 R)
• M30: 9,333,262 km (0.111 R)
• M31: 9,612,411 km (0.042 R)
• M32: 11,301,072 km (0.105 R)
• M33: 11,683,893 km (0.063 R)
• M34: 12,331,352 km (0.053 R)
• M35: 12,637,430 km (0.082 R)
• M36: 12,769,375 km (0.107 R)
• M37: 13,346,524 km (0.056 R)
• M38: 14,250,992 km (0.12 R)
• M39: 14,664,481 km (0.114 R)
• M40: 14,849,533 km (0.039 R)
• M41: 15,315,531 km (0.103 R)
• M42: 15,644,497 km (0.095 R)
• M43: 15,786,166 km (0.115 R)
• M44: 17,032,316 km (0.051 R)
• M45: 18,210,250 km (0.112 R)
• M46: 18,359,399 km (0.098 R)
• M47: 19,211,957 km (0.099 R)
• M48: 19,719,393 km (0.054 R)
• M49: 19,821,419 km (0.097 R)
• M50: 20,644,057 km (0.096 R)
• M51: 20,799,490 km (0.097 R)
• M52: 21,477,617 km (0.119 R)
• M53: 21,951,393 km (0.095 R)
• M54: 22,110,116 km (0.091 R)
• M55: 22,535,124 km (0.034 R)
• M56: 22,855,712 km (0.106 R)
• M57: 22,909,268 km (0.111 R)
• M58: 22,962,974 km (0.119 R)
• M59: 23,989,515 km (0.092 R)
• M60: 24,043,968 km (0.081 R)
• M61: 24,975,813 km (0.079 R)
• M62: 25,086,217 km (0.106 R)
• M63: 25,529,475 km (0.107 R)
• M64: 25,863,677 km (0.065 R)
• M65: 26,143,275 km (0.114 R)
• M66: 26,874,809 km (0.119 R)
• M67: 28,300,476 km (0.082 R)
• M68: 28,819,731 km (0.079 R)
• M69: 30,043,441 km (0.096 R)
• M70: 30,928,013 km (0.055 R)
• M71: 31,284,056 km (0.12 R)
• M72: 31,522,366 km (0.11 R)
• M73: 31,820,963 km (0.069 R)
• M74: 32,964,190 km (0.051 R)
• M75: 33,024,777 km (0.05 R)
• M76: 34,673,495 km (0.095 R)
• M77: 37,669,791 km (0.099 R)
• M78: 38,368,114 km (0.117 R)
• M79: 38,495,571 km (0.106 R)
• M80: 38,559,300 km (0.07 R)
• M81: 38,750,785 km (0.085 R)
• M82: 38,814,664 km (0.109 R)
• M83: 40,683,141 km (0.098 R)
• M84: 40,748,066 km (0.106 R)
• M85: 41,073,292 km (0.093 R)
• M86: 42,120,028 km (0.03 R)
• M87: 42,251,525 km (0.071 R)
• M88: 43,307,985 km (0.103 R)
• M89: 43,772,935 km (0.05 R)
• M90: 44,172,810 km (0.099 R)
• M91: 44,306,252 km (0.105 R)

Kuiper Belt

Range: 30 - 45 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 514 - 15,280 AU

Composition

Type: Cometary Reservoir

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

Gravitational Limit