QY Per superoutburst, updated photometric record YYYYMMDD(UT) mag observer 19991207.926 <156 (G. Poyner) 19991209.030 <150 (T. Kinnunen) 19991213.980 <152 (G. Poyner) 19991214.860 <152 (T. Kinnunen) 19991216.890 <150 (T. Kinnunen) 19991219.860 <144 (T. Kinnunen) 19991219.972 <149 (G. Poyner) 19991223.190 <175C (P. Schmeer) 19991228.145 135 (M. Simonsen) 19991228.166 136 (M. Simonsen) 19991228.167 139C (P. Schmeer) 19991228.908 138 (W. Worraker) 19991228.942 138 (W. Worraker) 19991229.603 138 (T. Watanabe) 19991229.613 132 (H. Itoh) 19991229.887 142Rc (G. Masi) 19991229.901 138 (H. McGee)