The spectra of RR Tau star, which belongs to the family of young irregular variable UX Ori type stars, in its different brightness states have been studied using a comparative analysis. Selected spectra of the star that are obtained with the Nordic Optical Telescope at various times when its brightness ranged from {10. 6^m} to {13. 9^m} have been presented. The veiling of spectral lines at brightness minima by circumstellar emission has been considered, and its origin has been discussed.
Dimitrieva et al. (Thu,) studied this question.