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 |
line | 70 676 159 385 827 ln | 1.4135231877165 × 1014 ln | 2.1202847815748 × 1014 ln | 2.8270463754331 × 1014 ln | 3.5338079692913 × 1014 ln | 4.2405695631496 × 1014 ln | 4.9473311570079 × 1014 ln | 5.6540927508661 × 1014 ln | 6.3608543447244 × 1014 ln | 7.0676159385827 × 1014 ln | 7.7743775324409 × 1014 ln | 8.4811391262992 × 1014 ln | 9.1879007201575 × 1014 ln | 9.8946623140157 × 1014 ln | 1.0601423907874 × 1015 ln | 1.1308185501732 × 1015 ln | 1.2014947095591 × 1015 ln | 1.2721708689449 × 1015 ln | 1.3428470283307 × 1015 ln | 1.4135231877165 × 1015 ln | 1.4841993471024 × 1015 ln | 1.5548755064882 × 1015 ln | 1.625551665874 × 1015 ln | 1.6962278252598 × 1015 ln | 1.7669039846457 × 1015 ln | 1.8375801440315 × 1015 ln | 1.9082563034173 × 1015 ln | 1.9789324628031 × 1015 ln | 2.049608622189 × 1015 ln | 2.1202847815748 × 1015 ln | 2.1909609409606 × 1015 ln | 2.2616371003465 × 1015 ln | 2.3323132597323 × 1015 ln | 2.4029894191181 × 1015 ln | 2.4736655785039 × 1015 ln | 2.5443417378898 × 1015 ln | 2.6150178972756 × 1015 ln | 2.6856940566614 × 1015 ln | 2.7563702160472 × 1015 ln | 2.8270463754331 × 1015 ln | 2.8977225348189 × 1015 ln | 2.9683986942047 × 1015 ln | 3.0390748535906 × 1015 ln | 3.1097510129764 × 1015 ln | 3.1804271723622 × 1015 ln | 3.251103331748 × 1015 ln | 3.3217794911339 × 1015 ln | 3.3924556505197 × 1015 ln | 3.4631318099055 × 1015 ln | 3.5338079692913 × 1015 ln | 3.6044841286772 × 1015 ln | 3.675160288063 × 1015 ln | 3.7458364474488 × 1015 ln | 3.8165126068346 × 1015 ln | 3.8871887662205 × 1015 ln | 3.9578649256063 × 1015 ln | 4.0285410849921 × 1015 ln | 4.099217244378 × 1015 ln | 4.1698934037638 × 1015 ln | 4.2405695631496 × 1015 ln | 4.3112457225354 × 1015 ln | 4.3819218819213 × 1015 ln | 4.4525980413071 × 1015 ln | 4.5232742006929 × 1015 ln | 4.5939503600787 × 1015 ln | 4.6646265194646 × 1015 ln | 4.7353026788504 × 1015 ln | 4.8059788382362 × 1015 ln | 4.876654997622 × 1015 ln | 4.9473311570079 × 1015 ln | 5.0180073163937 × 1015 ln | 5.0886834757795 × 1015 ln | 5.1593596351654 × 1015 ln | 5.2300357945512 × 1015 ln | 5.300711953937 × 1015 ln | 5.3713881133228 × 1015 ln | 5.4420642727087 × 1015 ln | 5.5127404320945 × 1015 ln | 5.5834165914803 × 1015 ln | 5.6540927508661 × 1015 ln | 5.724768910252 × 1015 ln | 5.7954450696378 × 1015 ln | 5.8661212290236 × 1015 ln | 5.9367973884094 × 1015 ln | 6.0074735477953 × 1015 ln | 6.0781497071811 × 1015 ln | 6.1488258665669 × 1015 ln | 6.2195020259528 × 1015 ln | 6.2901781853386 × 1015 ln | 6.3608543447244 × 1015 ln | 6.4315305041102 × 1015 ln | 6.5022066634961 × 1015 ln | 6.5728828228819 × 1015 ln | 6.6435589822677 × 1015 ln | 6.7142351416535 × 1015 ln | 6.7849113010394 × 1015 ln | 6.8555874604252 × 1015 ln | 6.926263619811 × 1015 ln | 6.9969397791969 × 1015 ln | 7.0676159385827 × 1015 ln |
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 | lines | astronomical units | lines |
---|---|---|---|
1 | = 70676159385827 | 4 | = 2.8270463754331E+14 |
1.5 | = 1.0601423907874E+14 | 4.5 | = 3.1804271723622E+14 |
2 | = 1.4135231877165E+14 | 5 | = 3.5338079692913E+14 |
2.5 | = 1.7669039846457E+14 | 5.5 | = 3.8871887662205E+14 |
3 | = 2.1202847815748E+14 | 6 | = 4.2405695631496E+14 |
The line (abbreviated L or l) was a small English unit of length, variously reckoned as 1⁄10, 1⁄12, 1⁄16, or 1⁄40 of an inch. It was not included among the units authorized as the British Imperial system in 1824.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
line | ln | ≡ 1⁄12 in | = 0.002116 m | Imperial/US |
lines | astronomical units | lines | astronomical units |
---|---|---|---|
1 | = 1.4149042742135E-14 | 4 | = 5.6596170968539E-14 |
1.5 | = 2.1223564113202E-14 | 4.5 | = 6.3670692339607E-14 |
2 | = 2.829808548427E-14 | 5 | = 7.0745213710674E-14 |
2.5 | = 3.5372606855337E-14 | 5.5 | = 7.7819735081742E-14 |
3 | = 4.2447128226405E-14 | 6 | = 8.4894256452809E-14 |
astronomical units | lines |
---|---|
1 | = 70 676 159 385 827 |
1.4149042742135 × 10-14 | = 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 …) |