Detailed Description of Catalogue VII/5A/

Url: http://astro.u-strasbg.fr/cgi-bin/Cat?VII/5A/
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VII/5A              Star Clusters and Associations, Selected Data (Alter+ 1970)
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Excerpt from the Catalogue of Stars Clusters and Associations
     Alter G., Ruprecht J., Vanysek V.
    <Akad. Kiado, Budapest, 3086 p., 2nd edition (1970)>
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ADC_Keywords: Associations, stellar ; Clusters, open

Description:
   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.

References:
   Alter, G., Balazs, B., and Ruprecht, J.  1970, Catalogue of Star Clusters
      and Associations, 2nd Edition, Akademiai Kiada Budapest, printed in
      Hungary (card form)

See also:
   Part   I (Associations, catalogue VII/31)
   Part  II (Globular Clusters, catalogue VII/44)
   Part III (Open Clusters, catalogue VII/101)

File Summary:

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  FileName      Lrecl  Records   Explanations

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ReadMe             80        .   This file
catalog            85     1039   The Catalogue

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Byte-by-byte Description of file: catalog

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   Bytes Format  Units   Label    Explanations

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   1-  6  F6.2   deg     GLON     Galactic longitude
   7- 12  F6.2   deg     GLAT     Galactic latitude
  14- 15  I2     h       RAh      Hours RA, equinox 1950.0
  17- 20  F4.1   min     RAm      Minutes RA, equinox 1950.0
      21  A1     ---     DE-      Sign Dec, equinox 1950.0
  22- 23  I2     deg     DEd      Degrees Dec, equinox 1950.0
  25- 26  I2     arcmin  DEm      Minutes Dec, equinox 1950.0
  28- 44  A17    ---     Name     Cluster name
  46- 49  A4     ---     Class    Trumbler class. codes, see below.
                                    The following coding is used:
                                        32p  = III 2 p
                                        43pn =  IV 3 p n, etc.
  51- 55  F5.1   arcmin  Diam     []? Angular diameter
  57- 61  I5     pc      Dist     []? Cluster distance
  63- 66  F4.1   mag     Mag1     []? Magnitude of brightest stars in cluster
  68- 69  A2     ---     SpType   Spectral type
      71  A1     ---     Code1    Unidentified code
  73- 76  F4.1   mag     IntMag   []? Total or integrated magnitude
                                      of the cluster
      78  A1     ---     Code2    Unidentified code
  80- 83  F4.2   mag     ColorEx  []? Color excess of the cluster in UBV system
      85  A1     ---     Code3    Unidentified code

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Note: 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

Historical Notes:
  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.
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(End)                                                                19-Mar-1994

CDS Catalogue Service