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HD 166724
HD 166724 is a star in the southern constellation of Corona Australis. It is invisible to the naked eye with an apparent visual magnitude of +9.33. The star is located at a distance of from the Sun based on stellar parallax, parallax, but is drifting closer with a radial velocity of −18 km/s. It is predicted to come as close as in around 1.2 million years from now. The star has an absolute magnitude of 6.20. The stellar classification of HD 166724 is K0IV/V, showing blended features of a K-type main-sequence star with a more stellar evolution, evolved subgiant star. It is slightly active with chromospheric activity being demonstrated by an emission line, emission peak in the Calcium K line, Ca II K absorption line. The age of the star is poorly constrained, but it is spinning slowly with a rotation period, period of around 30 days. It has 81% of the mass of the Sun and 80% of the Sun's girth. The star is radiating 39% of the luminosity of the Sun from it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corona Australis
Corona Australis is a constellation in the Southern Celestial Hemisphere. Its Latin name means "southern crown", and it is the southern counterpart of Corona Borealis, the northern crown. It is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax. Although fainter than its northern counterpart, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming region ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
