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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.| 391000 Siriometer | to common length units |
|---|---|
| 391000 sir | = 5.84936E+22 meters (m) |
| 391000 sir | = 5.84936E+19 kilometers (km) |
| 391000 sir | = 5.84936E+24 centimeters (cm) |
| 391000 sir | = 1.9190813648294E+23 feet (ft) |
| 391000 sir | = 2.3028976377953E+24 inches (in) |
| 391000 sir | = 6.3969378827647E+22 yards (yd) |
| 391000 sir | = 3.6346237970254E+19 miles (mi) |
| 391000 sir | = 6182602.2619173 light years (ly) |
| 391000 sir | = 2.2107820108072E+26 pixels (PX) |
| 391000 sir | = 3.65585E+57 planck length (pl) |