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Keywords: W UMa contact binary.jpeg en W Ursae Majoris is an eclipsing binary specifically a contact binary with a common envelope Parallax is 18 72 mas It is an X-ray source/ 2012-08-05 Aladin at SIMBAD url http //simbad u-strasbg fr/simbad/sim-basic Ident W+Ursae+Majoris submit SIMBAD+search Aladin at SIMBAD The primary component has a radius of 1 08 solar The secondary has a 0 78 solar radius cc-zero Uploaded with UploadWizard Binary stars Variable stars Ursa Major |