lunar distance | 1 LD | 2 LD | 3 LD | 4 LD | 5 LD | 6 LD | 7 LD | 8 LD | 9 LD | 10 LD | 11 LD | 12 LD | 13 LD | 14 LD | 15 LD | 16 LD | 17 LD | 18 LD | 19 LD | 20 LD | 21 LD | 22 LD | 23 LD | 24 LD | 25 LD | 26 LD | 27 LD | 28 LD | 29 LD | 30 LD | 31 LD | 32 LD | 33 LD | 34 LD | 35 LD | 36 LD | 37 LD | 38 LD | 39 LD | 40 LD | 41 LD | 42 LD | 43 LD | 44 LD | 45 LD | 46 LD | 47 LD | 48 LD | 49 LD | 50 LD | 51 LD | 52 LD | 53 LD | 54 LD | 55 LD | 56 LD | 57 LD | 58 LD | 59 LD | 60 LD | 61 LD | 62 LD | 63 LD | 64 LD | 65 LD | 66 LD | 67 LD | 68 LD | 69 LD | 70 LD | 71 LD | 72 LD | 73 LD | 74 LD | 75 LD | 76 LD | 77 LD | 78 LD | 79 LD | 80 LD | 81 LD | 82 LD | 83 LD | 84 LD | 85 LD | 86 LD | 87 LD | 88 LD | 89 LD | 90 LD | 91 LD | 92 LD | 93 LD | 94 LD | 95 LD | 96 LD | 97 LD | 98 LD | 99 LD | 100 LD |
astronomical unit | 0.0025696 AU | 0.0051391 AU | 0.0077087 AU | 0.0102783 AU | 0.0128478 AU | 0.0154174 AU | 0.0179870 AU | 0.0205565 AU | 0.0231261 AU | 0.0256957 AU | 0.0282653 AU | 0.0308348 AU | 0.0334044 AU | 0.0359740 AU | 0.0385435 AU | 0.0411131 AU | 0.0436827 AU | 0.0462522 AU | 0.0488218 AU | 0.0513914 AU | 0.0539609 AU | 0.0565305 AU | 0.0591001 AU | 0.0616696 AU | 0.0642392 AU | 0.0668088 AU | 0.0693784 AU | 0.0719479 AU | 0.0745175 AU | 0.0770871 AU | 0.0796566 AU | 0.0822262 AU | 0.0847958 AU | 0.0873653 AU | 0.0899349 AU | 0.0925045 AU | 0.0950740 AU | 0.0976436 AU | 0.1002132 AU | 0.1027827 AU | 0.1053523 AU | 0.1079219 AU | 0.1104915 AU | 0.1130610 AU | 0.1156306 AU | 0.1182002 AU | 0.1207697 AU | 0.1233393 AU | 0.1259089 AU | 0.1284784 AU | 0.1310480 AU | 0.1336176 AU | 0.1361871 AU | 0.1387567 AU | 0.1413263 AU | 0.1438958 AU | 0.1464654 AU | 0.1490350 AU | 0.1516046 AU | 0.1541741 AU | 0.1567437 AU | 0.1593133 AU | 0.1618828 AU | 0.1644524 AU | 0.1670220 AU | 0.1695915 AU | 0.1721611 AU | 0.1747307 AU | 0.1773002 AU | 0.1798698 AU | 0.1824394 AU | 0.1850089 AU | 0.1875785 AU | 0.1901481 AU | 0.1927176 AU | 0.1952872 AU | 0.1978568 AU | 0.2004264 AU | 0.2029959 AU | 0.2055655 AU | 0.2081351 AU | 0.2107046 AU | 0.2132742 AU | 0.2158438 AU | 0.2184133 AU | 0.2209829 AU | 0.2235525 AU | 0.2261220 AU | 0.2286916 AU | 0.2312612 AU | 0.2338307 AU | 0.2364003 AU | 0.2389699 AU | 0.2415395 AU | 0.2441090 AU | 0.2466786 AU | 0.2492482 AU | 0.2518177 AU | 0.2543873 AU | 0.2569569 AU |
Lunar distance (LD), also called Earth–Moon distance, Earth–Moon characteristic distance, or distance to the Moon, is as a unit of measure in astronomy. It is the average distance from the center of Earth to the center of the Moon.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
lunar distance | LD | ≈ 384402 km | ≈ 384 402 000 m | Science - Astronomy (Length) |
lunar distance | astronomical units | lunar distance | astronomical units |
---|---|---|---|
1 | ≈ 0.0025695686589742 | 4 | ≈ 0.010278274635897 |
1.5 | ≈ 0.0038543529884614 | 4.5 | ≈ 0.011563058965384 |
2 | ≈ 0.0051391373179485 | 5 | ≈ 0.012847843294871 |
2.5 | ≈ 0.0064239216474356 | 5.5 | ≈ 0.014132627624358 |
3 | ≈ 0.0077087059769227 | 6 | ≈ 0.015417411953845 |
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 | lunar distance | astronomical units | lunar distance |
---|---|---|---|
1 | ≈ 389.17037554435 | 4 | ≈ 1556.6815021774 |
1.5 | ≈ 583.75556331653 | 4.5 | ≈ 1751.2666899496 |
2 | ≈ 778.3407510887 | 5 | ≈ 1945.8518777218 |
2.5 | ≈ 972.92593886088 | 5.5 | ≈ 2140.4370654939 |
3 | ≈ 1167.5111266331 | 6 | ≈ 2335.0222532661 |
lunar distance | astronomical units |
---|---|
1 | ≈ 0.0025696 |
389.1703755 | ≈ 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 …) |