SN 2000dj too rapid fading? As reminded by Yamaoka-san, the reported SN 2000dj may not be a supernova. If the observation by Sostero is correct, the reported fading of 2.8 mag in 1.6 d is exceptional for a supernova! The object may be a foreground recurrent eruptive object. Further observations and search for old materials are highly encouraged. The speed of decline may be acceptable for a normal outburst of an SU UMa-type dwarf nova. YYYYMMDD(UT) mag observer 20000825.399 <190C (KAIT (from IAUC)) 20000908.400 174:C (KAIT (from IAUC)) 20000909.400 171:C (KAIT (from IAUC)) 20000911.099 199:C (G. Sostero) Regards, Taichi Kato