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 |
link | 743,644,979,529.59 lnk | 1,487,289,959,059.2 lnk | 2,230,934,938,588.8 lnk | 2,974,579,918,118.4 lnk | 3,718,224,897,647.9 lnk | 4,461,869,877,177.5 lnk | 5,205,514,856,707.1 lnk | 5,949,159,836,236.7 lnk | 6,692,804,815,766.3 lnk | 7,436,449,795,295.9 lnk | 8,180,094,774,825.5 lnk | 8,923,739,754,355.1 lnk | 9,667,384,733,884.6 lnk | 10 411 029 713 414 lnk | 11 154 674 692 944 lnk | 11 898 319 672 473 lnk | 12 641 964 652 003 lnk | 13 385 609 631 533 lnk | 14 129 254 611 062 lnk | 14 872 899 590 592 lnk | 15 616 544 570 121 lnk | 16 360 189 549 651 lnk | 17 103 834 529 181 lnk | 17 847 479 508 710 lnk | 18 591 124 488 240 lnk | 19 334 769 467 769 lnk | 20 078 414 447 299 lnk | 20 822 059 426 828 lnk | 21 565 704 406 358 lnk | 22 309 349 385 888 lnk | 23 052 994 365 417 lnk | 23 796 639 344 947 lnk | 24 540 284 324 476 lnk | 25 283 929 304 006 lnk | 26 027 574 283 536 lnk | 26 771 219 263 065 lnk | 27 514 864 242 595 lnk | 28 258 509 222 124 lnk | 29 002 154 201 654 lnk | 29 745 799 181 184 lnk | 30 489 444 160 713 lnk | 31 233 089 140 243 lnk | 31 976 734 119 772 lnk | 32 720 379 099 302 lnk | 33 464 024 078 831 lnk | 34 207 669 058 361 lnk | 34 951 314 037 891 lnk | 35 694 959 017 420 lnk | 36 438 603 996 950 lnk | 37 182 248 976 479 lnk | 37 925 893 956 009 lnk | 38 669 538 935 539 lnk | 39 413 183 915 068 lnk | 40 156 828 894 598 lnk | 40 900 473 874 127 lnk | 41 644 118 853 657 lnk | 42 387 763 833 187 lnk | 43 131 408 812 716 lnk | 43 875 053 792 246 lnk | 44 618 698 771 775 lnk | 45 362 343 751 305 lnk | 46 105 988 730 834 lnk | 46 849 633 710 364 lnk | 47 593 278 689 894 lnk | 48 336 923 669 423 lnk | 49 080 568 648 953 lnk | 49 824 213 628 482 lnk | 50 567 858 608 012 lnk | 51 311 503 587 542 lnk | 52 055 148 567 071 lnk | 52 798 793 546 601 lnk | 53 542 438 526 130 lnk | 54 286 083 505 660 lnk | 55 029 728 485 190 lnk | 55 773 373 464 719 lnk | 56 517 018 444 249 lnk | 57 260 663 423 778 lnk | 58 004 308 403 308 lnk | 58 747 953 382 837 lnk | 59 491 598 362 367 lnk | 60 235 243 341 897 lnk | 60 978 888 321 426 lnk | 61 722 533 300 956 lnk | 62 466 178 280 485 lnk | 63 209 823 260 015 lnk | 63 953 468 239 545 lnk | 64 697 113 219 074 lnk | 65 440 758 198 604 lnk | 66 184 403 178 133 lnk | 66 928 048 157 663 lnk | 67 671 693 137 193 lnk | 68 415 338 116 722 lnk | 69 158 983 096 252 lnk | 69 902 628 075 781 lnk | 70 646 273 055 311 lnk | 71 389 918 034 840 lnk | 72 133 563 014 370 lnk | 72 877 207 993 900 lnk | 73 620 852 973 429 lnk | 74 364 497 952 959 lnk |
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 | links | astronomical units | links |
---|---|---|---|
1 | ≈ 743644979529.59 | 4 | ≈ 2974579918118.4 |
1.5 | ≈ 1115467469294.4 | 4.5 | ≈ 3346402407883.1 |
2 | ≈ 1487289959059.2 | 5 | ≈ 3718224897647.9 |
2.5 | ≈ 1859112448824 | 5.5 | ≈ 4090047387412.7 |
3 | ≈ 2230934938588.8 | 6 | ≈ 4461869877177.5 |
The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. A link is exactly 66⁄100 of a foot, or exactly 7.92 inches or 20.1168 cm.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
link | lnk | ≡ 1⁄100 ch ≡ 0.66 ft (US) ≡ 7.92 in | ≈ 0.2011684 m | Imperial/US |
links | astronomical units | links | astronomical units |
---|---|---|---|
1 | ≈ 1.3447276960473E-12 | 4 | ≈ 5.3789107841894E-12 |
1.5 | ≈ 2.017091544071E-12 | 4.5 | ≈ 6.0512746322131E-12 |
2 | ≈ 2.6894553920947E-12 | 5 | ≈ 6.7236384802367E-12 |
2.5 | ≈ 3.3618192401184E-12 | 5.5 | ≈ 7.3960023282604E-12 |
3 | ≈ 4.034183088142E-12 | 6 | ≈ 8.0683661762841E-12 |
astronomical units | links |
---|---|
1 | ≈ 743,644,979,529.59 |
1.3447276960473 × 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 …) |