We have started tonight observation of V503 Cyg at Kyoto. M. Uemura and Kyoto team reported that the observation on December 7 shows rapidly fading. The object is now brighter than on December 9. Another outburst? Regards, R. Ishioka, M. Uemura, T. Kato, K. Matsumoto, H. Iwamatsu at Kyoto University