| 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 |
| spat | 0.1495979 S | 0.2991957 S | 0.4487936 S | 0.5983915 S | 0.7479894 S | 0.8975872 S | 1.0471851 S | 1.1967830 S | 1.3463808 S | 1.4959787 S | 1.6455766 S | 1.7951744 S | 1.9447723 S | 2.0943702 S | 2.2439681 S | 2.3935659 S | 2.5431638 S | 2.6927617 S | 2.8423595 S | 2.9919574 S | 3.1415553 S | 3.2911532 S | 3.4407510 S | 3.5903489 S | 3.7399468 S | 3.8895446 S | 4.0391425 S | 4.1887404 S | 4.3383383 S | 4.4879361 S | 4.6375340 S | 4.7871319 S | 4.9367297 S | 5.0863276 S | 5.2359255 S | 5.3855233 S | 5.5351212 S | 5.6847191 S | 5.8343170 S | 5.9839148 S | 6.1335127 S | 6.2831106 S | 6.4327084 S | 6.5823063 S | 6.7319042 S | 6.8815021 S | 7.0310999 S | 7.1806978 S | 7.3302957 S | 7.4798935 S | 7.6294914 S | 7.7790893 S | 7.9286871 S | 8.0782850 S | 8.2278829 S | 8.3774808 S | 8.5270786 S | 8.6766765 S | 8.8262744 S | 8.9758722 S | 9.1254701 S | 9.2750680 S | 9.4246659 S | 9.5742637 S | 9.7238616 S | 9.8734595 S | 10.0230573 S | 10.1726552 S | 10.3222531 S | 10.4718509 S | 10.6214488 S | 10.7710467 S | 10.9206446 S | 11.0702424 S | 11.2198403 S | 11.3694382 S | 11.5190360 S | 11.6686339 S | 11.8182318 S | 11.9678297 S | 12.1174275 S | 12.2670254 S | 12.4166233 S | 12.5662211 S | 12.7158190 S | 12.8654169 S | 13.0150148 S | 13.1646126 S | 13.3142105 S | 13.4638084 S | 13.6134062 S | 13.7630041 S | 13.9126020 S | 14.0621998 S | 14.2117977 S | 14.3613956 S | 14.5109935 S | 14.6605913 S | 14.8101892 S | 14.9597871 S |
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.
| 1 astronomical units ≡ 0.1495978707 spats | 4 astronomical units ≡ 0.5983914828 spats |
| 1.5 astronomical units ≡ 0.22439680605 spats | 4.5 astronomical units ≡ 0.67319041815 spats |
| 2 astronomical units ≡ 0.2991957414 spats | 5 astronomical units ≡ 0.7479893535 spats |
| 2.5 astronomical units ≡ 0.37399467675 spats | 5.5 astronomical units ≡ 0.82278828885 spats |
| 3 astronomical units ≡ 0.4487936121 spats | 6 astronomical units ≡ 0.8975872242 spats |
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.
| 1 spats ≡ 6.6845871222684 astronomical units | 4 spats ≡ 26.738348489074 astronomical units |
| 1.5 spats ≡ 10.026880683403 astronomical units | 4.5 spats ≡ 30.080642050208 astronomical units |
| 2 spats ≡ 13.369174244537 astronomical units | 5 spats ≡ 33.422935611342 astronomical units |
| 2.5 spats ≡ 16.711467805671 astronomical units | 5.5 spats ≡ 36.765229172476 astronomical units |
| 3 spats ≡ 20.053761366805 astronomical units | 6 spats ≡ 40.107522733611 astronomical units |
| 1 astronomical units ≡ 0.1495979 spats |
| 1 spats ≡ 6.6845871 astronomical units |