RY Sgr fading YYYYMMDD(UT) mag observer 20010512.760 61 (H. Itoh) 20010513.165 66 (C. F. Kurtz) 20010513.203 66 (S. Otero) 20010513.697 6.63V (M. Watanabe) 20010517.142 67 (C. F. Kurtz) 20010517.201 67 (C. F. Kurtz) 20010517.449 68 (P. Williams) 20010517.688 6.71V (M. Watanabe) 20010518.687 6.82V (M. Watanabe) 20010518.756 61 (H. Itoh) 20010519.440 68 (P. Williams) 20010520.166 70: (S. Otero) 20010522.560 72 (P. Williams) 20010524.440 72 (P. Williams) 20010525.440 72 (P. Williams) 20010527.658 7.29V (M. Watanabe) 20010529.110 74 (S. Otero) 20010601.626 78 (Y. Watanabe) 20010602.631 75 (S. Takahashi)