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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.| 253000 Siriometer | to common length units |
|---|---|
| 253000 sir | = 3.78488E+22 meters (m) |
| 253000 sir | = 3.78488E+19 kilometers (km) |
| 253000 sir | = 3.78488E+24 centimeters (cm) |
| 253000 sir | = 1.2417585301837E+23 feet (ft) |
| 253000 sir | = 1.4901102362205E+24 inches (in) |
| 253000 sir | = 4.1391951006124E+22 yards (yd) |
| 253000 sir | = 2.3518153980752E+19 miles (mi) |
| 253000 sir | = 4000507.3459465 light years (ly) |
| 253000 sir | = 1.4305060069929E+26 pixels (PX) |
| 253000 sir | = 2.36555E+57 planck length (pl) |