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On Current Distance Scales for Open Clusters

Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case, we have chosen several modern OCL distance scales to test them for the same clusters and the same angular diameters that Trumpler had used back in 1930. These scales are Pylskaya L· Barkhatova (1980), Danilov h Seleznev (1994), Loktin & Beshenov (2000), Dambis (1999), Lynga (1987) and Robichon et al. (1999). When preparing these scales we used the Catalogue of Open Clusters and Associations (Pylskaya 1998), which is being maintained at the Ural State University for several decades, and the open cluster database WEBDA (Mermilliod 1998).