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We report the discovery of a new cataclysmic variable MASTER OTJ161700.81+620024.9 which is identical to the faint ROSAT X-ray source 1RXSJ161659.5+620014. The object was observed in outbursts to 14.4m on 2012 Sep. 11by MASTER-Tunka and to 14.3m on 2013 Jan. 21/22 by MASTER-Kislovodsk, but wasnot detected by the routine search procedures. Analysis of the archival MASTERdata and CRTS light curve shows the variability from 17.8m at quiescence to14.3m in outbursts, confirming that the new variable is a dwarf nova. SDSScolors suggest a small contribution from the secondary component and aretelling in favor of the short orbital period.

New Cataclysmic Variable 1RXS J161659.5+620014 in Draco