Astronomical unit

An astronomical unit (abbreviatit as au;^[1] ither abbreviations that are sometimes uised include ㍳, a.u. an ua^[2]) is a unit o length nou defined as exactly 7011149597870700000♠149597870700 m (92,955,807.3 mi),^[3] or roughly the average Yird–Sun distance.

astronomical unit
Unit seestem	Astronomical seestem o units (Acceptit for uise wi the SI)
Unit o	length
Seembol	au or ua
Unit conversions
1 au or ua in ...	... is equal tae ...
km	7008149600000000000♠149.6×106
mi	7007929560000000000♠92.956×106
pc	6994484809999999999♠4.8481×10−6
ly	6995158130000000000♠15.813×10−6

References

1. International Astronomical Union, ed. (31 August 2012), "RESOLUTION B2 on the re-definition of the astronomical unit of length" (PDF), RESOLUTION B2, Beijing, Kina: International Astronomical Union, retrieved 11 Mey 2013, The XXVIII General Assembly of International Astronomical Union recommends [adopted] … that the unique symbol “au” be used for the astronomical unit.
2. Bureau International des Poids et Mesures (2006), The International System of Units (SI) (PDF) (8th ed.), Organisation Intergouvernementale de la Convention du Mètre, p. 126
3. International Astronomical Union, ed. (31 August 2012), "RESOLUTION B2 on the re-definition of the astronomical unit of length" (PDF), RESOLUTION B2, Beijing, Kina: International Astronomical Union, retrieved 19 September 2012, The XXVIII General Assembly of International Astronomical Union recommends [adopted] that the astronomical unit be re-defined to be a conventional unit of length equal to exactly 149 597 870 700 meters, in agreement with the value adopted in IAU 2009 Resolution B2