spat | 1 S | 2 S | 3 S | 4 S | 5 S | 6 S | 7 S | 8 S | 9 S | 10 S | 11 S | 12 S | 13 S | 14 S | 15 S | 16 S | 17 S | 18 S | 19 S | 20 S | 21 S | 22 S | 23 S | 24 S | 25 S | 26 S | 27 S | 28 S | 29 S | 30 S | 31 S | 32 S | 33 S | 34 S | 35 S | 36 S | 37 S | 38 S | 39 S | 40 S | 41 S | 42 S | 43 S | 44 S | 45 S | 46 S | 47 S | 48 S | 49 S | 50 S | 51 S | 52 S | 53 S | 54 S | 55 S | 56 S | 57 S | 58 S | 59 S | 60 S | 61 S | 62 S | 63 S | 64 S | 65 S | 66 S | 67 S | 68 S | 69 S | 70 S | 71 S | 72 S | 73 S | 74 S | 75 S | 76 S | 77 S | 78 S | 79 S | 80 S | 81 S | 82 S | 83 S | 84 S | 85 S | 86 S | 87 S | 88 S | 89 S | 90 S | 91 S | 92 S | 93 S | 94 S | 95 S | 96 S | 97 S | 98 S | 99 S | 100 S |
astronomical unit | 6.6845871 AU | 13.3691742 AU | 20.0537614 AU | 26.7383485 AU | 33.4229356 AU | 40.1075227 AU | 46.7921099 AU | 53.4766970 AU | 60.1612841 AU | 66.8458712 AU | 73.5304583 AU | 80.2150455 AU | 86.8996326 AU | 93.5842197 AU | 100.2688068 AU | 106.9533940 AU | 113.6379811 AU | 120.3225682 AU | 127.0071553 AU | 133.6917424 AU | 140.3763296 AU | 147.0609167 AU | 153.7455038 AU | 160.4300909 AU | 167.1146781 AU | 173.7992652 AU | 180.4838523 AU | 187.1684394 AU | 193.8530265 AU | 200.5376137 AU | 207.2222008 AU | 213.9067879 AU | 220.5913750 AU | 227.2759622 AU | 233.9605493 AU | 240.6451364 AU | 247.3297235 AU | 254.0143106 AU | 260.6988978 AU | 267.3834849 AU | 274.0680720 AU | 280.7526591 AU | 287.4372463 AU | 294.1218334 AU | 300.8064205 AU | 307.4910076 AU | 314.1755947 AU | 320.8601819 AU | 327.5447690 AU | 334.2293561 AU | 340.9139432 AU | 347.5985304 AU | 354.2831175 AU | 360.9677046 AU | 367.6522917 AU | 374.3368788 AU | 381.0214660 AU | 387.7060531 AU | 394.3906402 AU | 401.0752273 AU | 407.7598145 AU | 414.4444016 AU | 421.1289887 AU | 427.8135758 AU | 434.4981629 AU | 441.1827501 AU | 447.8673372 AU | 454.5519243 AU | 461.2365114 AU | 467.9210986 AU | 474.6056857 AU | 481.2902728 AU | 487.9748599 AU | 494.6594470 AU | 501.3440342 AU | 508.0286213 AU | 514.7132084 AU | 521.3977955 AU | 528.0823827 AU | 534.7669698 AU | 541.4515569 AU | 548.1361440 AU | 554.8207311 AU | 561.5053183 AU | 568.1899054 AU | 574.8744925 AU | 581.5590796 AU | 588.2436668 AU | 594.9282539 AU | 601.6128410 AU | 608.2974281 AU | 614.9820152 AU | 621.6666024 AU | 628.3511895 AU | 635.0357766 AU | 641.7203637 AU | 648.4049509 AU | 655.0895380 AU | 661.7741251 AU | 668.4587122 AU |
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 | astronomical units | spats | astronomical units |
---|---|---|---|
1 | ≡ 6.6845871222684 | 4 | ≡ 26.738348489074 |
1.5 | ≡ 10.026880683403 | 4.5 | ≡ 30.080642050208 |
2 | ≡ 13.369174244537 | 5 | ≡ 33.422935611342 |
2.5 | ≡ 16.711467805671 | 5.5 | ≡ 36.765229172476 |
3 | ≡ 20.053761366805 | 6 | ≡ 40.107522733611 |
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 | spats | astronomical units | spats |
---|---|---|---|
1 | ≡ 0.1495978707 | 4 | ≡ 0.5983914828 |
1.5 | ≡ 0.22439680605 | 4.5 | ≡ 0.67319041815 |
2 | ≡ 0.2991957414 | 5 | ≡ 0.7479893535 |
2.5 | ≡ 0.37399467675 | 5.5 | ≡ 0.82278828885 |
3 | ≡ 0.4487936121 | 6 | ≡ 0.8975872242 |
spats | astronomical units |
---|---|
1 | ≡ 6.6845871 |
0.1495979 | ≡ 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 …) |