How many astronomical unit in 1 siriometer? The answer is 999999.99538095. We assume you are converting between astronomical unit and siriometre. You can view more details on each measurement unit: astronomical unit or siriometer The SI base unit for length is the metre. 1 metre is equal to 6.6845871226706E-12 astronomical unit, or 6.684587153547E-18 siriometer. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between astronomical units and siriometers. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from siriometer to astronomical unit, or enter any two units below:
The astronomical unit (AU or au or a.u. or sometimes ua) is a unit of length. It is approximately equal to the mean distance between the Earth and Sun. The currently accepted value of the AU is 149 597 870 691 ± 30 metres (about 150 million kilometres or 93 million miles).
The symbol "ua" is recommended by the Bureau International des Poids et Mesures, but in the United States and other anglophone countries the reverse usage is more common. The International Astronomical Union recommends "au" and international standard ISO 31-1 uses "AU".
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