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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+
Plethron is a measurement used in Ancient times, equal to 100 Greek feet (pous). It was roughly the width of a typical athletic running-track, and was used as the st ..more definition+
In relation to the base unit of [length] => (meters), 1 Siriometer (sir) is equal to 1.496E+17 meters, while 1 Greek Plethron (pleth) = 30.8 meters.| 4517000000000 Siriometer | to common length units |
|---|---|
| 4517000000000 sir | = 6.757432E+29 meters (m) |
| 4517000000000 sir | = 6.757432E+26 kilometers (km) |
| 4517000000000 sir | = 6.757432E+31 centimeters (cm) |
| 4517000000000 sir | = 2.2170052493438E+30 feet (ft) |
| 4517000000000 sir | = 2.6604062992126E+31 inches (in) |
| 4517000000000 sir | = 7.3900174978128E+29 yards (yd) |
| 4517000000000 sir | = 4.1988735783027E+26 miles (mi) |
| 4517000000000 sir | = 71424077793045 light years (ly) |
| 4517000000000 sir | = 2.5539903690067E+33 pixels (PX) |
| 4517000000000 sir | = 4.223395E+64 planck length (pl) |