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The siriometer is a rarely used and an obsolete astronomical unit of length, defined to be equal to about one million astronomical units (au). One siriometer is approxim ..more definition+
In relation to the base unit of [length] => (meters), 1 Siriometer (sir) is equal to 1.496E+17 meters, while 1 Himetrics (hiMetric) = 1.0E-5 meters.| 20500 Siriometer | to common length units |
|---|---|
| 20500 sir | = 3.0668E+21 meters (m) |
| 20500 sir | = 3.0668E+18 kilometers (km) |
| 20500 sir | = 3.0668E+23 centimeters (cm) |
| 20500 sir | = 1.0061679790026E+22 feet (ft) |
| 20500 sir | = 1.2074015748031E+23 inches (in) |
| 20500 sir | = 3.3538932633421E+21 yards (yd) |
| 20500 sir | = 1.9056211723535E+18 miles (mi) |
| 20500 sir | = 324151.78099567 light years (ly) |
| 20500 sir | = 1.1591056578401E+25 pixels (PX) |
| 20500 sir | = 1.91675E+56 planck length (pl) |