V1089 Sgr outburst YYYYMMDD(UT) mag observer 20010722.541 <145 (P. Nelson) 20010813.425 <144 (R. Stubbings) 20010813.560 <150 (P. Nelson) 20010824.565 <144 (P. Nelson) 20010831.587 <125 (P. Nelson) 20010910.560 <144 (P. Nelson) 20010917.500 <140 (P. Nelson) 20010918.540 150: (P. Nelson)