Yadav, R. K. S.; Glushkhova, E. V.; Sariya, D. P.; Porokhova, A. V.; Kumar, B.; Sagar, R.
(MNRAS, 2011)
We present UBVI CCD photometry in the region of the open clusters Koposov 12, Koposov
53 and Koposov 77. The optical CCD data for these clusters are obtained for the first time.
The radii are found to be 4.6, 4.2 and 2.4 ...