Home›A-type main-sequence stars›40 Persei🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусский中文EntityQ4637411· pop 7· linked from 185 articles40 PerseiAlso known as o Persei, 40 Perbinary star system in the constellation PerseusWikidata factsDistance from Earth332Radius9.82Mass12.5Show 16 more factscatalog codeALS 14762spectral classB0.5VSB,VBstellar rotational velocity73apparent magnitude5.061parallax3.09right ascension55.59435646917declination33.96502481194effective temperature28850radial velocityAvailable in 7 languagesEspañolFrançais中文PortuguêsAsturianSvenskavia Wikidata sitelinks · CC0ConnectionsyearEntitylight-yearEntityCategoriesA-type main-sequence starsBayer objectsBinary starsBright Star Catalogue objectsB-type main-sequence starsDurchmusterung objectsFlamsteed objectsHenry Draper Catalogue objectsHipparcos objectsPerseus (constellation)