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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 Zettameters (Zm) = 1.0E+21 meters.| 300 Siriometer | to common length units |
|---|---|
| 300 sir | = 4.488E+19 meters (m) |
| 300 sir | = 4.488E+16 kilometers (km) |
| 300 sir | = 4.488E+21 centimeters (cm) |
| 300 sir | = 1.4724409448819E+20 feet (ft) |
| 300 sir | = 1.7669291338583E+21 inches (in) |
| 300 sir | = 4.9081364829396E+19 yards (yd) |
| 300 sir | = 2.7887139107612E+16 miles (mi) |
| 300 sir | = 4743.6845999366 light years (ly) |
| 300 sir | = 1.696252182205E+23 pixels (PX) |
| 300 sir | = 2.805E+54 planck length (pl) |