OJ_287-20210411-S001-R001-B-193819.fts

Only less than 50 stars was detected

OJ_287-20210411-S001-R001-I-194216.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-11 10:42:17 16.00 0.057

OJ_287-20210411-S001-R001-R-194058.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-11 10:40:59 15.42 0.090

OJ_287-20210411-S001-R001-V-193941.fts

Only less than 50 stars was detected