CCD magnitudes obtained by P. Schmeer, Bischmisheim, Germany: DK CASSIOPEIAE (UG) CASDK 991121.156 <180C Scp CASDK 991127.137 153C Scp Sequence: USNO-A2.0 (red magnitudes) Instrument: IRO (0.5-m RCT + AP-8) First outburst (and positive observation) ever reported to VSNet! (Gary Poyner's estimate for 1998 Aug. 21.974 UT was a negative one and should read '<14.2') DK Cas is according to the GCVS an SS Cyg-type dwarf nova with a photographic magnitude range of 15.3 to about 19.5 and a mean cycle length of approximately 96 days. The following USNO-A2.0 data are available for DK Cas (in outburst): R.A. 00h18m07.907s Decl. +57o26'07.43" (J2000.0) r= 16.5, b= 17.7 A finding chart is in Downes and Shara (1993). Time-resolved photometry is encouraged. Regards, Patrick P.S.: Earlier today I had informed Taichi Kato about this outburst. He 'had a look at DK Cas and found it clearly visible (mag 15 or even brighter?)'.