Confirmation of the symbiotic nature of CSS 1102 on the basis of spectral and photometric observations carried out at the CMO SAI MSU

The results of new spectral and photometric observations of the poorly studied S-star CSS 1102 are presented. According to the analysis of spectra, CSS 1102 was classified as a symbiotic star. We observed HI, HeI and [NeIII] emission lines in both spectra of the star. The absorption spectrum demonstrates the prominent molecular bands of TiO, ZrO and YO. The system consists of a cold component that is a zirconium star of spectral type S4.5/2, a hot component with 40000 K < Thot < 55000 K, and a nebula. Photometric monitorings in the B band showed the existence of a flickering effect with different periods in CSS 1102. This variability may be associated with emission of an accretion disk in CSS 1102 system.