Usenko, I. A.Kovtyukh, Valery V.Miroshnichenko, A. S.Danford, S.2017-02-222017-02-222016Odessa Astronomical Publicationshttps://dspace.onu.edu.ua/handle/123456789/9420We present the results of an analysis of 21 spectra of UMi (Polaris) obtained in September – December 2015. Frequency analysis shows an increase of the pulsation period up to 8.6 min in comparison to the 2007 observational set. The radial velocity amplitude comes to 4.16 kms􀀀1, and it approximately twice the one found in 2007. The average Teff = 6017 K, and it is close to the value determined for the 2001–2004 set. Therefore Polaris moves to the red edge of the Cepheid instability strip (CIS).enStars: radial velocitiesCepheids: overtone pulsationsCepheids: companionsCepheids: а UMiArticle