BV photometry of NGC 3680
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A new CCD BV color-magnitude diagram (CMD) has been derived for the intermediate age open cluster NGC 3680. The quality of photometry coupled with the best-to-date knowledge of...
针对中等年龄疏散星团NGC 3680，我们得到了全新的电荷耦合器件（Charge-Coupled Device, CCD）BV色星等图（Color-Magnitude Diagram, CMD）。此次测光的质量与迄今最完善的相关认知……
