(Beta Carinae) The second brightest star in the constellation Carina, a subgiant A star. Its name is of uncertain origin, possibly part Arab, part Latin: the Arabic Mi'ah for 'waters' combining with the Latin placidus to give 'placid waters.' Visual magnitude 1.67 Absolut... Found on http://www.daviddarling.info/encyclopedia/M/Miaplacidus.html