The K line is exceedingly faint. The lines of Cr II vary in intensity. The star appears to be of luminosity class III and is brighter than the main sequence. The spectrum is exceedingly complex and requires the highest dispersion for adequate study. The lines of Si II and Eu II are both strong.
Many spectral lines vary in intensity.
The appearance of the wings of the hydrogen lines indicates that the star is more luminous than an ordinary A dwarf. A number of peculiar features which distinguish the spectrum of 78 Vir are present but are in general fainter. The Si II lines are not abnormally strong. The K line and a number of other spectral features vary in intensity within a period of a few days. 17 Com .