OJ_287-20210419-S001-R001-B-192527.fts

Only less than 50 stars was detected

OJ_287-20210419-S001-R001-I-192917.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-19 10:29:18 16.41 0.058

OJ_287-20210419-S001-R001-R-192801.fts

relative photometry graph from USNO-B1 catalog

Date UT magnitude mag_erorr 2021-04-19 10:28:02 14.81 0.091

OJ_287-20210419-S001-R001-V-192645.fts

Only less than 50 stars was detected