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 |
fermi | 3.84402 × 1023 fm | 7.68804 × 1023 fm | 1.153206 × 1024 fm | 1.537608 × 1024 fm | 1.92201 × 1024 fm | 2.306412 × 1024 fm | 2.690814 × 1024 fm | 3.075216 × 1024 fm | 3.459618 × 1024 fm | 3.84402 × 1024 fm | 4.228422 × 1024 fm | 4.612824 × 1024 fm | 4.997226 × 1024 fm | 5.381628 × 1024 fm | 5.76603 × 1024 fm | 6.150432 × 1024 fm | 6.534834 × 1024 fm | 6.919236 × 1024 fm | 7.303638 × 1024 fm | 7.68804 × 1024 fm | 8.072442 × 1024 fm | 8.456844 × 1024 fm | 8.841246 × 1024 fm | 9.225648 × 1024 fm | 9.61005 × 1024 fm | 9.994452 × 1024 fm | 1.0378854 × 1025 fm | 1.0763256 × 1025 fm | 1.1147658 × 1025 fm | 1.153206 × 1025 fm | 1.1916462 × 1025 fm | 1.2300864 × 1025 fm | 1.2685266 × 1025 fm | 1.3069668 × 1025 fm | 1.345407 × 1025 fm | 1.3838472 × 1025 fm | 1.4222874 × 1025 fm | 1.4607276 × 1025 fm | 1.4991678 × 1025 fm | 1.537608 × 1025 fm | 1.5760482 × 1025 fm | 1.6144884 × 1025 fm | 1.6529286 × 1025 fm | 1.6913688 × 1025 fm | 1.729809 × 1025 fm | 1.7682492 × 1025 fm | 1.8066894 × 1025 fm | 1.8451296 × 1025 fm | 1.8835698 × 1025 fm | 1.92201 × 1025 fm | 1.9604502 × 1025 fm | 1.9988904 × 1025 fm | 2.0373306 × 1025 fm | 2.0757708 × 1025 fm | 2.114211 × 1025 fm | 2.1526512 × 1025 fm | 2.1910914 × 1025 fm | 2.2295316 × 1025 fm | 2.2679718 × 1025 fm | 2.306412 × 1025 fm | 2.3448522 × 1025 fm | 2.3832924 × 1025 fm | 2.4217326 × 1025 fm | 2.4601728 × 1025 fm | 2.498613 × 1025 fm | 2.5370532 × 1025 fm | 2.5754934 × 1025 fm | 2.6139336 × 1025 fm | 2.6523738 × 1025 fm | 2.690814 × 1025 fm | 2.7292542 × 1025 fm | 2.7676944 × 1025 fm | 2.8061346 × 1025 fm | 2.8445748 × 1025 fm | 2.883015 × 1025 fm | 2.9214552 × 1025 fm | 2.9598954 × 1025 fm | 2.9983356 × 1025 fm | 3.0367758 × 1025 fm | 3.075216 × 1025 fm | 3.1136562 × 1025 fm | 3.1520964 × 1025 fm | 3.1905366 × 1025 fm | 3.2289768 × 1025 fm | 3.267417 × 1025 fm | 3.3058572 × 1025 fm | 3.3442974 × 1025 fm | 3.3827376 × 1025 fm | 3.4211778 × 1025 fm | 3.459618 × 1025 fm | 3.4980582 × 1025 fm | 3.5364984 × 1025 fm | 3.5749386 × 1025 fm | 3.6133788 × 1025 fm | 3.651819 × 1025 fm | 3.6902592 × 1025 fm | 3.7286994 × 1025 fm | 3.7671396 × 1025 fm | 3.8055798 × 1025 fm | 3.84402 × 1025 fm |
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 | fermi | lunar distance | fermi |
---|---|---|---|
1 | ≈ 3.84402E+23 | 4 | ≈ 1.537608E+24 |
1.5 | ≈ 5.76603E+23 | 4.5 | ≈ 1.729809E+24 |
2 | ≈ 7.68804E+23 | 5 | ≈ 1.92201E+24 |
2.5 | ≈ 9.61005E+23 | 5.5 | ≈ 2.114211E+24 |
3 | ≈ 1.153206E+24 | 6 | ≈ 2.306412E+24 |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fermi | fm | ≡ 1×10−15 m | ≡ 1×10−15 m | Metric system Non-SI |
fermi | lunar distance | fermi | lunar distance |
---|---|---|---|
1 | ≈ 2.6014432807322E-24 | 4 | ≈ 1.0405773122929E-23 |
1.5 | ≈ 3.9021649210982E-24 | 4.5 | ≈ 1.1706494763295E-23 |
2 | ≈ 5.2028865614643E-24 | 5 | ≈ 1.3007216403661E-23 |
2.5 | ≈ 6.5036082018304E-24 | 5.5 | ≈ 1.4307938044027E-23 |
3 | ≈ 7.8043298421965E-24 | 6 | ≈ 1.5608659684393E-23 |
lunar distance | fermi |
---|---|
1 | ≈ 3.84402 × 1023 |
2.6014432807322 × 10-24 | ≈ 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 …) |