New Results of Photometric and Spectral Study of The Young Variable Star V645 Cyg

We present the results of the ongoing spectral and photometric study at the Kourovka Observatory of the young variable star V645 Cyg, which is an Ae/Be Herbig object and is located in a region of active star formation. The increase in brightness and reddening of the color of V645 Cyg, previously discovered by the authors and continuing to this day, as well as the increase in the absorption component of the blue wing of the Hα line profile are interpreted within the framework of the assumption of a decrease in the optical thickness of the expanding gas-dust cocoon and an increase in the visibility of regions of the gas-dust envelope heated by the radiation of the star. New results obtained during 2024 are presented.