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We present the results of an analysis of 21 spectra of alpha UMi (Polaris)obtained in September - December 2015. Frequency analysis shows an increase ofthe pulsation period up to 8.6 min in comparison to the 2007 observational set.The radial velocity amplitude comes to 4.16 km s^-1, and it approximately twicethe one found in 2007. The average Teff = 6017 K, and it is close to the valuedetermined for the 2001-2004 set. Therefore Polaris moves to the red edge ofthe Cepheid instability strip (CIS)

Effective temperature and radial velocity of the small-amplitude Cepheid Polaris (alpha UMi) in 2015