Research on the membership and spatial motion of the open cluster NGC6530 |
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| Institution: | 1. Shanghai University, Shanghai 200444, China;2. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China |
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| Abstract: | or stars in the region around the open cluster NGC6530, cluster memberships are calculated based on the maximum likelihood principle using proper motions obtained from photographic plates acquired with the 40 cm refraction telescope at Shanghai Astronomical Observatory. Analyses show that the membership determination is very effective with 250 stars having membership probabilities p ≥ 0.9. The spatial motion of the star cluster is also determined and a simple discussion is carried out. |
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