It was classified as K0ep Ia from a 1949 spectrum, but also recognised to have a small hot companion, plus an unusual infrared excess. Ultraviolet spectra allowed absorption lines from the companion to be studied and it was given a spectral type of B0-1.
It was designated as K0ep Ia from a 1949 spectrum, but also acknowledged to have a small hot companion, plus an unusual infrared surplus. Ultraviolet spectra enabled the study of absorption lines from the companion and it was given a spectral type of B0-1.