Аннотация:High-quality CCD spectra of a bright dusty comet, Hyakutake C/1996 B2, are taken using SAI MSU AZT-2 optical telescope (located at 1,Leninski Gori), exposures 10-100 s, on 27 March 1996, i.e., at the time moments when orbital space telescope ROSAT started soft X-ray, 0.1-1 keV, observations of the comet - motivation derived from theoretical prediction (Ibadov S., Icarus 86, 283-287, 1990; K.Dennerl, J.Truemper, FRG; C.Lisse, USA, Private communications to S.Ibadov,1998,1999)- and for the first time detected X-rays from comets. The spectra obtained may be useful for understanding strong time variation of the X-ray intensity.