Home›Cygnus (constellation)›天鵝座BC🌐中文EnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусский中文EntityQ3631788· pop 10· linked from 307 articles天鵝座BCAlso known as BC Cyg, HIP 100404, BD + 37 3903star in the constellation CygnusWikidata factsShow 10 more factscatalog codeGaia DR2 2060971294293250944right ascension305.41061705422200declination37.53303271775750effective temperature3673parallax1.20apparent magnitude0.25radial velocity-3.0spectral classM3.5Iaright ascension component of proper motion-30declination component of proper motion-18via Wikidata · CC0Available in 10 languagesEspañolFrançais中文РусскийItalianoAfrikaansAsturianMacedonianUkrainianvia Wikidata sitelinks · CC0ConnectionsSolar SystemEntityyearEntityCategoriesCygnus (constellation)Durchmusterung objectsHipparcos objectsIRAS catalogue objectsM-type supergiantsObjects with variable star designationsSemiregular variable stars