light-hour | 1 light-hour | 2 light-hour | 3 light-hour | 4 light-hour | 5 light-hour | 6 light-hour | 7 light-hour | 8 light-hour | 9 light-hour | 10 light-hour | 11 light-hour | 12 light-hour | 13 light-hour | 14 light-hour | 15 light-hour | 16 light-hour | 17 light-hour | 18 light-hour | 19 light-hour | 20 light-hour | 21 light-hour | 22 light-hour | 23 light-hour | 24 light-hour | 25 light-hour | 26 light-hour | 27 light-hour | 28 light-hour | 29 light-hour | 30 light-hour | 31 light-hour | 32 light-hour | 33 light-hour | 34 light-hour | 35 light-hour | 36 light-hour | 37 light-hour | 38 light-hour | 39 light-hour | 40 light-hour | 41 light-hour | 42 light-hour | 43 light-hour | 44 light-hour | 45 light-hour | 46 light-hour | 47 light-hour | 48 light-hour | 49 light-hour | 50 light-hour | 51 light-hour | 52 light-hour | 53 light-hour | 54 light-hour | 55 light-hour | 56 light-hour | 57 light-hour | 58 light-hour | 59 light-hour | 60 light-hour | 61 light-hour | 62 light-hour | 63 light-hour | 64 light-hour | 65 light-hour | 66 light-hour | 67 light-hour | 68 light-hour | 69 light-hour | 70 light-hour | 71 light-hour | 72 light-hour | 73 light-hour | 74 light-hour | 75 light-hour | 76 light-hour | 77 light-hour | 78 light-hour | 79 light-hour | 80 light-hour | 81 light-hour | 82 light-hour | 83 light-hour | 84 light-hour | 85 light-hour | 86 light-hour | 87 light-hour | 88 light-hour | 89 light-hour | 90 light-hour | 91 light-hour | 92 light-hour | 93 light-hour | 94 light-hour | 95 light-hour | 96 light-hour | 97 light-hour | 98 light-hour | 99 light-hour | 100 light-hour |
spat | 1.0792528 S | 2.1585057 S | 3.2377585 S | 4.3170114 S | 5.3962642 S | 6.4755171 S | 7.5547699 S | 8.6340228 S | 9.7132756 S | 10.7925285 S | 11.8717813 S | 12.9510342 S | 14.0302870 S | 15.1095399 S | 16.1887927 S | 17.2680456 S | 18.3472984 S | 19.4265513 S | 20.5058041 S | 21.5850570 S | 22.6643098 S | 23.7435627 S | 24.8228155 S | 25.9020684 S | 26.9813212 S | 28.0605741 S | 29.1398269 S | 30.2190798 S | 31.2983326 S | 32.3775855 S | 33.4568383 S | 34.5360912 S | 35.6153440 S | 36.6945969 S | 37.7738497 S | 38.8531026 S | 39.9323554 S | 41.0116083 S | 42.0908611 S | 43.1701140 S | 44.2493668 S | 45.3286196 S | 46.4078725 S | 47.4871253 S | 48.5663782 S | 49.6456310 S | 50.7248839 S | 51.8041367 S | 52.8833896 S | 53.9626424 S | 55.0418953 S | 56.1211481 S | 57.2004010 S | 58.2796538 S | 59.3589067 S | 60.4381595 S | 61.5174124 S | 62.5966652 S | 63.6759181 S | 64.7551709 S | 65.8344238 S | 66.9136766 S | 67.9929295 S | 69.0721823 S | 70.1514352 S | 71.2306880 S | 72.3099409 S | 73.3891937 S | 74.4684466 S | 75.5476994 S | 76.6269523 S | 77.7062051 S | 78.7854580 S | 79.8647108 S | 80.9439637 S | 82.0232165 S | 83.1024694 S | 84.1817222 S | 85.2609751 S | 86.3402279 S | 87.4194808 S | 88.4987336 S | 89.5779865 S | 90.6572393 S | 91.7364921 S | 92.8157450 S | 93.8949978 S | 94.9742507 S | 96.0535035 S | 97.1327564 S | 98.2120092 S | 99.2912621 S | 100.3705149 S | 101.4497678 S | 102.5290206 S | 103.6082735 S | 104.6875263 S | 105.7667792 S | 106.8460320 S | 107.9252849 S |
The light-hour is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in onehour, and is equal to exactly 1.0792528488×1012 metres.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-hour | ≡ 60 light-minutes | ≡ 1.0792528488×1012 m | Science - Astronomy (Length) |
light-hours | spats | light-hours | spats |
---|---|---|---|
1 | ≡ 1.0792528488 | 4 | ≡ 4.3170113952 |
1.5 | ≡ 1.6188792732 | 4.5 | ≡ 4.8566378196 |
2 | ≡ 2.1585056976 | 5 | ≡ 5.396264244 |
2.5 | ≡ 2.698132122 | 5.5 | ≡ 5.9358906684 |
3 | ≡ 3.2377585464 | 6 | ≡ 6.4755170928 |
The spat (symbol S) is also an obsolete unit of distance used in astronomy. It is equal to 1000000000 kilometres (1 Tm or 1012 m). It is about 6.6846 astronomical units (AU), 1.057×10−4 light-years or3.240×10−5 parsecs.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
spat | S | ≡ 1×1012 m | ≡ 1×1012 m | Science - Astronomy (Length) |
spats | light-hours | spats | light-hours |
---|---|---|---|
1 | ≡ 0.92656693110598 | 4 | ≡ 3.7062677244239 |
1.5 | ≡ 1.389850396659 | 4.5 | ≡ 4.1695511899769 |
2 | ≡ 1.853133862212 | 5 | ≡ 4.6328346555299 |
2.5 | ≡ 2.3164173277649 | 5.5 | ≡ 5.0961181210829 |
3 | ≡ 2.7797007933179 | 6 | ≡ 5.5594015866359 |
light-hours | spats |
---|---|
1 | ≡ 1.0792528 |
0.9265669 | ≡ 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 …) |