7005A VII/5A Star Clusters and Associations, Selected Data G Alter J Ruprecht V Vanysek Akad. Kiado, Budapest, 3086 p., 2nd edition ??? ??? 1970 1970csca.book.....A VII/31B : Part I (Associations) VII/44B : Part II (Globular Clusters) VII/101 : Part III (Open Clusters) Alter, G., Balazs, B., and Ruprecht, J. 1970, Catalogue of Star Clusters and Associations, 2nd Edition, Akademiai Kiada Budapest, printed in Hungary (card form) Associations, stellar Clusters, open The catalog is a selection of data on all open clusters extracted from the second, considerably enlarged edition of the "Catalogue of Star Clusters and Associations" edited by Alter, Balazs, and Ruprecht (1970), which includes four parts: Part 1: 1039 open clusters, five moving clusters, and 11 stellar groups; Part 2: 70 OB associations; Part 3: 125 globular clusters; Part 4: 28 extragalactic objects. The catalog includes galactic and equatorial coordinates, name, classification, angular diameter, distance, magnitude and spectral types of the brightest stars, total magnitude, and color excess.

GLON Galactic longitude deg GLAT Galactic latitude deg RAh Hours RA, equinox 1950.0 h RAm Minutes RA, equinox 1950.0 min DE- Sign Dec, equinox 1950.0 --- DEd Degrees Dec, equinox 1950.0 deg DEm Minutes Dec, equinox 1950.0 arcmin Name Cluster name --- Class Trumpler class. codes, see below. The following coding is used: 32p = III 2 p 43pn = IV 3 p n, etc. --- Diam Angular diameter arcmin Dist Cluster distance pc Mag1 Magnitude of brightest stars in cluster mag SpType Spectral type --- Code1 Unidentified code --- IntMag Total or integrated magnitude of the cluster mag Code2 Unidentified code --- ColorEx Color excess of the cluster in UBV system mag Code3 Unidentified code --- CDS 1994Mar19 UNKNOWN UNKNOWN 1988 May: Wayne H. Warren Jr. Astronomical Data Center The machine-readable version of this compilation was received from the Centre de Donnees de Strasbourg in January 1979. A brief format description had been prepared there through a comparison of the data with the second edition of the published catalog, since the original description only consisted of the following statement: "The file contains information about coordinate type, distance, diameter, etc.... for all open clusters known in 1968." The original format was condensed and contained mostly integer numbers that were difficult to read and interpret. Therefore, the catalog format was modified and expanded at the Astronomical Data Center, NASA Goddard Space Flight Center, and this new description has been prepared for the new format. A copy of the original catalog was sent to Dr. Charles J. Peterson of the University of Missouri, Columbia, who prepared notes about the format and identification of many of the data, and the description below is based partly on these notes. We appreciate the efforts of Dr. Peterson in describing the data and returning this information to the ADC, and for communicating with us at length about the catalog. UNKNOWN UNKNOWN Trumpler classification system (see Trumpler, R. J. 1930, Lick Obs. Bull. 14, 154) First figure: Appearance (projected distribution of stars) I Detached cluster with strong central concentration. II Detached cluster with little central concentration. III Detached cluster with no noticeable concentration, i.e., a uniform distribution of stars within the cluster boundaries. IV Cluster that appears more like a star field concentration. Second figure: Stellar brightnesses 1 Most cluster stars are nearly of the same apparent brightness. 2 A medium range in the brightnesses of stars. 3 Bright and faint stars are both present. Generally a few very bright stars and some moderately bright stars embedded in a body of fainter stars can be seen. Third figure: Number of stars p a poor cluster, n < 50 stars. m a moderately rich cluster, 50 < n < 100 stars. r a rich cluster, n > 100 stars. Fourth figure: Other characteristics e elongated u asymmetrical n associated nebulosity VII_5A.xml