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 |
quarter | 654,408,883,202.1 qr. | 1,308,817,766,404.2 qr. | 1,963,226,649,606.3 qr. | 2,617,635,532,808.4 qr. | 3,272,044,416,010.5 qr. | 3,926,453,299,212.6 qr. | 4,580,862,182,414.7 qr. | 5,235,271,065,616.8 qr. | 5,889,679,948,818.9 qr. | 6 544 088 832 021 qr. | 7,198,497,715,223.1 qr. | 7,852,906,598,425.2 qr. | 8,507,315,481,627.3 qr. | 9,161,724,364,829.4 qr. | 9,816,133,248,031.5 qr. | 10 470 542 131 234 qr. | 11 124 951 014 436 qr. | 11 779 359 897 638 qr. | 12 433 768 780 840 qr. | 13 088 177 664 042 qr. | 13 742 586 547 244 qr. | 14 396 995 430 446 qr. | 15 051 404 313 648 qr. | 15 705 813 196 850 qr. | 16 360 222 080 052 qr. | 17 014 630 963 255 qr. | 17 669 039 846 457 qr. | 18 323 448 729 659 qr. | 18 977 857 612 861 qr. | 19 632 266 496 063 qr. | 20 286 675 379 265 qr. | 20 941 084 262 467 qr. | 21 595 493 145 669 qr. | 22 249 902 028 871 qr. | 22 904 310 912 073 qr. | 23 558 719 795 276 qr. | 24 213 128 678 478 qr. | 24 867 537 561 680 qr. | 25 521 946 444 882 qr. | 26 176 355 328 084 qr. | 26 830 764 211 286 qr. | 27 485 173 094 488 qr. | 28 139 581 977 690 qr. | 28 793 990 860 892 qr. | 29 448 399 744 094 qr. | 30 102 808 627 297 qr. | 30 757 217 510 499 qr. | 31 411 626 393 701 qr. | 32 066 035 276 903 qr. | 32 720 444 160 105 qr. | 33 374 853 043 307 qr. | 34 029 261 926 509 qr. | 34 683 670 809 711 qr. | 35 338 079 692 913 qr. | 35 992 488 576 115 qr. | 36 646 897 459 318 qr. | 37 301 306 342 520 qr. | 37 955 715 225 722 qr. | 38 610 124 108 924 qr. | 39 264 532 992 126 qr. | 39 918 941 875 328 qr. | 40 573 350 758 530 qr. | 41 227 759 641 732 qr. | 41 882 168 524 934 qr. | 42 536 577 408 136 qr. | 43 190 986 291 339 qr. | 43 845 395 174 541 qr. | 44 499 804 057 743 qr. | 45 154 212 940 945 qr. | 45 808 621 824 147 qr. | 46 463 030 707 349 qr. | 47 117 439 590 551 qr. | 47 771 848 473 753 qr. | 48 426 257 356 955 qr. | 49 080 666 240 157 qr. | 49 735 075 123 360 qr. | 50 389 484 006 562 qr. | 51 043 892 889 764 qr. | 51 698 301 772 966 qr. | 52 352 710 656 168 qr. | 53 007 119 539 370 qr. | 53 661 528 422 572 qr. | 54 315 937 305 774 qr. | 54 970 346 188 976 qr. | 55 624 755 072 178 qr. | 56 279 163 955 381 qr. | 56 933 572 838 583 qr. | 57 587 981 721 785 qr. | 58 242 390 604 987 qr. | 58 896 799 488 189 qr. | 59 551 208 371 391 qr. | 60 205 617 254 593 qr. | 60 860 026 137 795 qr. | 61 514 435 020 997 qr. | 62 168 843 904 199 qr. | 62 823 252 787 402 qr. | 63 477 661 670 604 qr. | 64 132 070 553 806 qr. | 64 786 479 437 008 qr. | 65 440 888 320 210 qr. |
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 | quarters | astronomical units | quarters |
---|---|---|---|
1 | = 654408883202.1 | 4 | = 2617635532808.4 |
1.5 | = 981613324803.15 | 4.5 | = 2944839974409.4 |
2 | = 1308817766404.2 | 5 | = 3272044416010.5 |
2.5 | = 1636022208005.2 | 5.5 | = 3599248857611.5 |
3 | = 1963226649606.3 | 6 | = 3926453299212.6 |
The quarter (lit. "one-fourth") is used as the name of several distinct English units based on ¼ sizes of some base unit.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
quarter | qr. | ≡ 1⁄4 yd | = 0.2286 m | Metric system SI |
quarters | astronomical units | quarters | astronomical units |
---|---|---|---|
1 | = 1.5280966161506E-12 | 4 | = 6.1123864646023E-12 |
1.5 | = 2.2921449242258E-12 | 4.5 | = 6.8764347726775E-12 |
2 | = 3.0561932323011E-12 | 5 | = 7.6404830807528E-12 |
2.5 | = 3.8202415403764E-12 | 5.5 | = 8.4045313888281E-12 |
3 | = 4.5842898484517E-12 | 6 | = 9.1685796969034E-12 |
astronomical units | quarters |
---|---|
1 | = 654,408,883,202.1 |
1.5280966161506 × 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 …) |