Nanchuan Five is a bright star cluster in the southern skyDiamond CrossThe brightest star in the cluster is located at the southwest end of the cluster.South Ship Five is commonly known in English as Miaplacidus, which means "calm water".
South Ship FiveCommon name ofMiaplacidusIt first appeared in the star map Geography of the Heavens drawn by Elijah Hinsdale Burritt published in 1856.Its meaning and language origin have been a mystery for decades, until 1882 when William Higgins speculated that the name seemed to come from a mixture of two languages: Arabic مييههههههههههههههههه160;And the Latin placidus, which means "calm".[1]
NanchuanwuStellar spectrumIt is A1III, showing a giant star in white or bluish white.In 1990, a study based on spectrophotometry and trigonometric parallax to estimate the temperature, radius and luminosity of the star listed this star as a sub giant of the A2IV spectral type.In any case, due to the estimated age of only 260 million years, Nanchuan Five has stopped fusing hydrogen in its core. In another 2-3 million years, it will evolve into a red giant star.
The mass of Nanchanwu is 3.5 times that of the sun. With its evolution from the main sequence, it has expanded to 6.8 solar radii.Its surface temperature is 8866K, 288 times brighter than the sun.This star is a fast rotating star, and its projection rotation speed is 145.7 kilometers per second.The mass of Nanchuan Five is not enough to end the life of its supernova.On the contrary, when it reaches the end of its life cycle, it will break away from its shell and gradually disappear into a white dwarf star.[1]
