BVI photometry of two open clusters
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We present the results of CCD BVI Johnson-Cousins photometry down to V~19mag in the regions of the unstudied stellar groups Pismis 23 and BH 222, both projected close to the...
本文给出了未被研究的恒星群Pismis 23与BH 222所在天区的CCD BVI约翰逊-考辛斯测光（CCD BVI Johnson-Cousins photometry）结果，该测光的V波段极限星等可达约19星等，两个恒星群的投影位置均靠近……
