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The spectrophotometric variability of the mCP star 56 Ari in the far-UVspectral region from 1150 \AA\ to 1980 \AA\ is investigated. This study isbased on the archival {\it IUE} data obtained at different phases of therotational cycle. The brightness of 56 Ari is not constant in the investigatedwavelengths over the whole rotational period. The monochromatic light curvescontinuously change their shape with wavelength. The comparison of energydistributions at three phases show that the first minimum of light curves atphase 0.25 is replaced by the maximum for $\lambda>$1608\AA, but the secondminimum of light curves at phase 0.65 absent in the spectral region between$\lambda$1938\AA\ and $\lambda$1980\AA. The variable broad features in thefar-UV connected with a non-uniform distribution of silicon over the surface of56 Ari influence substantially the light variations in the UV.

Ultraviolet variability of the mCP star 56 Arietis