astronomical unit | 1 AU | 2 AU | 3 AU | 4 AU | 5 AU | 6 AU | 7 AU | 8 AU | 9 AU | 10 AU | 11 AU | 12 AU | 13 AU | 14 AU | 15 AU | 16 AU | 17 AU | 18 AU | 19 AU | 20 AU | 21 AU | 22 AU | 23 AU | 24 AU | 25 AU | 26 AU | 27 AU | 28 AU | 29 AU | 30 AU | 31 AU | 32 AU | 33 AU | 34 AU | 35 AU | 36 AU | 37 AU | 38 AU | 39 AU | 40 AU | 41 AU | 42 AU | 43 AU | 44 AU | 45 AU | 46 AU | 47 AU | 48 AU | 49 AU | 50 AU | 51 AU | 52 AU | 53 AU | 54 AU | 55 AU | 56 AU | 57 AU | 58 AU | 59 AU | 60 AU | 61 AU | 62 AU | 63 AU | 64 AU | 65 AU | 66 AU | 67 AU | 68 AU | 69 AU | 70 AU | 71 AU | 72 AU | 73 AU | 74 AU | 75 AU | 76 AU | 77 AU | 78 AU | 79 AU | 80 AU | 81 AU | 82 AU | 83 AU | 84 AU | 85 AU | 86 AU | 87 AU | 88 AU | 89 AU | 90 AU | 91 AU | 92 AU | 93 AU | 94 AU | 95 AU | 96 AU | 97 AU | 98 AU | 99 AU | 100 AU |
foot, metric | 473,070,004,518.64 mf | 946,140,009,037.27 mf | 1,419,210,013,555.9 mf | 1,892,280,018,074.5 mf | 2,365,350,022,593.2 mf | 2,838,420,027,111.8 mf | 3,311,490,031,630.5 mf | 3,784,560,036,149.1 mf | 4,257,630,040,667.7 mf | 4,730,700,045,186.4 mf | 5 203 770 049 705 mf | 5,676,840,054,223.6 mf | 6,149,910,058,742.3 mf | 6,622,980,063,260.9 mf | 7,096,050,067,779.6 mf | 7,569,120,072,298.2 mf | 8,042,190,076,816.8 mf | 8,515,260,081,335.5 mf | 8,988,330,085,854.1 mf | 9,461,400,090,372.7 mf | 9,934,470,094,891.4 mf | 10 407 540 099 410 mf | 10 880 610 103 929 mf | 11 353 680 108 447 mf | 11 826 750 112 966 mf | 12 299 820 117 485 mf | 12 772 890 122 003 mf | 13 245 960 126 522 mf | 13 719 030 131 040 mf | 14 192 100 135 559 mf | 14 665 170 140 078 mf | 15 138 240 144 596 mf | 15 611 310 149 115 mf | 16 084 380 153 634 mf | 16 557 450 158 152 mf | 17 030 520 162 671 mf | 17 503 590 167 190 mf | 17 976 660 171 708 mf | 18 449 730 176 227 mf | 18 922 800 180 745 mf | 19 395 870 185 264 mf | 19 868 940 189 783 mf | 20 342 010 194 301 mf | 20 815 080 198 820 mf | 21 288 150 203 339 mf | 21 761 220 207 857 mf | 22 234 290 212 376 mf | 22 707 360 216 895 mf | 23 180 430 221 413 mf | 23 653 500 225 932 mf | 24 126 570 230 451 mf | 24 599 640 234 969 mf | 25 072 710 239 488 mf | 25 545 780 244 006 mf | 26 018 850 248 525 mf | 26 491 920 253 044 mf | 26 964 990 257 562 mf | 27 438 060 262 081 mf | 27 911 130 266 600 mf | 28 384 200 271 118 mf | 28 857 270 275 637 mf | 29 330 340 280 156 mf | 29 803 410 284 674 mf | 30 276 480 289 193 mf | 30 749 550 293 711 mf | 31 222 620 298 230 mf | 31 695 690 302 749 mf | 32 168 760 307 267 mf | 32 641 830 311 786 mf | 33 114 900 316 305 mf | 33 587 970 320 823 mf | 34 061 040 325 342 mf | 34 534 110 329 861 mf | 35 007 180 334 379 mf | 35 480 250 338 898 mf | 35 953 320 343 416 mf | 36 426 390 347 935 mf | 36 899 460 352 454 mf | 37 372 530 356 972 mf | 37 845 600 361 491 mf | 38 318 670 366 010 mf | 38 791 740 370 528 mf | 39 264 810 375 047 mf | 39 737 880 379 566 mf | 40 210 950 384 084 mf | 40 684 020 388 603 mf | 41 157 090 393 121 mf | 41 630 160 397 640 mf | 42 103 230 402 159 mf | 42 576 300 406 677 mf | 43 049 370 411 196 mf | 43 522 440 415 715 mf | 43 995 510 420 233 mf | 44 468 580 424 752 mf | 44 941 650 429 271 mf | 45 414 720 433 789 mf | 45 887 790 438 308 mf | 46 360 860 442 826 mf | 46 833 930 447 345 mf | 47 307 000 451 864 mf |
The astronomical unit (symbol: au or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 149 597 870 700 metres (about 150 million kilometres, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
astronomical unit | AU | ≡ 149 597 870 700 m ≈ Distance from Earth to Sun | ≡ 149 597 870 700 m | Science - Astronomy (Length) |
astronomical units | feet, metric | astronomical units | feet, metric |
---|---|---|---|
1 | ≈ 473070004518.64 | 4 | ≈ 1892280018074.5 |
1.5 | ≈ 709605006777.96 | 4.5 | ≈ 2128815020333.9 |
2 | ≈ 946140009037.27 | 5 | ≈ 2365350022593.2 |
2.5 | ≈ 1182675011296.6 | 5.5 | ≈ 2601885024852.5 |
3 | ≈ 1419210013555.9 | 6 | ≈ 2838420027111.8 |
A metric foot is a nickname for a preferred number length of 3 basic modules (3 M), or 30 centimetres (11.811 in). The 30 cm metric ruler was a similar length to the traditional imperial one-foot ruler. A metric foot is 4.8 millimetres (0.189 in) shorter than an imperial foot.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
foot, metric | mf | ≡ √ 1⁄10 m | ≈ 0.31622776602 m | Metric system Non-SI |
feet, metric | astronomical units | feet, metric | astronomical units |
---|---|---|---|
1 | ≈ 2.113852052441E-12 | 4 | ≈ 8.455408209764E-12 |
1.5 | ≈ 3.1707780786615E-12 | 4.5 | ≈ 9.5123342359846E-12 |
2 | ≈ 4.227704104882E-12 | 5 | ≈ 1.0569260262205E-11 |
2.5 | ≈ 5.2846301311025E-12 | 5.5 | ≈ 1.1626186288426E-11 |
3 | ≈ 6.341556157323E-12 | 6 | ≈ 1.2683112314646E-11 |
astronomical units | feet, metric |
---|---|
1 | ≈ 473,070,004,518.64 |
2.113852052441 × 10-12 | ≈ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |