Photometric and spectral study of the star as 442

The results of long-term spectral and photometric observations of the AeBe Herbig-type star AS 442 were analyzed.Based on more than 1300 measurements taken in UBVR filters at the Maidanak Observatory in Uzbekistan in 1982-1996, the light curve and color dependence curves of the star were constructed, and the periodicity of these changes in different seasons was checked by applying statistical Fourier analysis.It was shown that no stable periodicity was detected in the changes in brightness and colors.The star is bright in most cases, but large-amplitude eclipses were detected in three seasons.Spectral observations of the star were carried out at the 2 m telescope of the Shamakhi Astrophysical Observatory during 2020-2024.It was shown that the spectrum of the star exhibits serious changes.Various structural changes detected in the H line can be explained by the ejection and accretion of matter in the circumstellar disk.Such profiles exhibit a stable structure over the observation season.