BD Camelopardalis
BD Camelopardalis is an S star and symbiotic star in the constellation Camelopardalis It was recognized as spectroscopic binary star in 1922,
Although the star's spectrum shows the spectral features of zirconium oxide which define spectral class S BD Cam shows no technetium lines in its spectrum.
https://en.wikipedia.org/wiki/BD_Camelopardalis
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