CW Octantis
star in the constellation Octans
CW Octantis, also known as HD 148542, is a solitary, white hued variable star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 6.03, allowing it to be faintly visible to the naked eye. Parallax measurements from Gaia DR3 place the object at a distance of 629 light years. It appears to be receding from the Solar System with a heliocentric radial velocity of 7.1 km/s.
CW Octantis has a stellar classification of A3 IV, indicating that it is an evolved A-type star heading towards the red giant branch. Zorec and Royer (2012) model it as a dwarf star that has just reached the end of its main sequence lifetime. It has 2.98 times the mass of the Sun and 4.6 times its radius. It radiates 111 times the luminosity of the Sun from its photosphere at an effective temperature of 8,791 K. CW Octantis is estimated to be 188 million years old.
This object is classified as a Alpha2 Canum Venaticorum variable. Most stars of this class have chemical peculiarities in their spectra, but CW Octantis seems to be ordinary.
“CW Octantis” enters the record as star in the constellation Octans. Crown Archives preserves that source wording while asking what Octantis, star and constellation can confirm, complicate or overturn.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 13, 2026. The linked authority identifier is Q5737714. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2012.
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This entry incorporates text from “CW Octantis” 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.