HD 169853
star in the constellation Corona Australis
HD 169853, also known as HR 6910 or rarely 9 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.62. Gaia DR3 parallax measurements imply a distance of 391 light years, and it is currently approaching the Solar System with a heliocentric radial velocity of −21.3 km/s. At its current distance, HD 169853's brightness is diminished by 0.36 magnitudes due to extinction from interstellar dust and it has an absolute magnitude of +0.13.
HD 169853 has a stellar classification of A2mA2-F0, indicating that it is an Am star with the calcium H lines of an A2 star and the metallic lines of an F0 star. Abt and Morell (1995) give a class of A3 III, indicating that the object is instead an evolved A-type giant star with no chemical peculiarities. A paper published in late 1987 found that HD 169853 had an overabundance of silicon, manganese, strontium, and barium.
The object has 2.09 times the mass of the Sun and a slightly enlarged radius of 3.72 R☉. It radiates 60.7 times the luminosity of the Sun from its photosphere at an effective temperature of 8,437 K. It has a near solar metallicity at (Fe/H) = −0.01 and it is estimated to be 585 million years old, having completed 80% of its main sequence lifetime. Like many chemically peculiar stars, HD 169853 rotates rather slowly, having a projected rotational velocity of 22.6 km/s.
Begin with the source’s own compact description: “HD 169853” is star in the constellation Corona Australis. The dossier treats that line as a proposition to test through star, constellation and Corona, not as a finished interpretation.
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This entry incorporates text from “HD 169853” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.