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Photometric studies of open star clusters Haffner 11 and Czernik 31
Institution:1. Division of Forest Insect Pests & Diseases, National Institute of Forest Science, Seoul 02455, Republic of Korea;2. Division of Forest Soil and Water Conservation, National Institute of Forest Science, Seoul 02455, Republic of Korea;3. Land Information Team, Korea Forestry Promotion Institute, Seoul 07570, Republic of Korea;4. Department of Life and Nanopharmaceutical Sciences and Department of Biology, Kyung Hee University, Seoul 02447, Republic of Korea;1. Astronomy Dept., National Research Institute of Astronomy and Geophysics, (NRIAG), Helwan, Cairo 11421, Egypt;2. Department of Astronomy and Meteorology, Faculty of Science, Al-Azhar University, Cairo, Egypt.
Abstract:
Keywords:Star  Evolution-stars  Hertzsprung–Russell and colour-magnitude diagrams-open clusters and associations  Individual  Haffner 11 and Czernik 31
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