C/2017 O1 (ASASSN) 2017 09 18.98: m1=10.3 (Tri-G), Dia.=6'x8', Tail=7' ...20-cm Houghton-Terebizh telescope + QHY12 color CCD-camera ...images by V. Nebotov, photometry by A. Novichonok
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