OY Car superoutburst rapid fading YYYYMMDD(UT) mag observer 20001206.464 125 (R. Stubbings) 20001207.462 127 (R. Stubbings) 20001207.790 126 (A. Pearce) 20001208.464 126 (R. Stubbings) 20001209.487 126 (R. Stubbings) 20001210.625 129 (A. Pearce) 20001212.492 <132 (R. Stubbings) 20001212.635 133 (A. Pearce) 20001213.471 <140 (R. Stubbings)