/ftp/cats/I/211



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I/211   ==OBSOLETE version of Catalogue==
29-Mar-2002: (by Francois Ochsenbein) See I/269
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Query from: http://vizier.u-strasbg.fr/cgi-bin/VizieR?-source=I/211
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drwxr-xr-x 283 cats archive 8192 Nov 25 13:26 [Up] drwxr-xr-x 2 cats archive 4096 Dec 15 2013 [TAR file] -rw-r--r-- 1 cats archive 386 Apr 11 2002 .message -rw-r--r-- 1 cats archive 48 Jan 30 2009 =obsolete= -r--r--r-- 1 cats archive 7317 Apr 10 2002 ReadMe -r--r--r-- 1 cats archive 2209387 Nov 12 1999 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 8318 Oct 28 1994 ccdm.doc.gz [Uncompressed]
Beginning of ReadMe : I/211 CCDM (Components of Double and Multiple stars) (Dommanget+ 1994) ================================================================================ Catalogue of the Components of Double, Multiple stars (CCDM) first edition Dommanget J., Nys O. <Comm. Obs. R. Belgique, Ser. A, N. 115 (1994)> =1994CoORB.115....1D ================================================================================ ADC_Keywords: Stars, double and multiple Description: The introduction to this catalogue has been the subject of a publication in the "Communications de l'Observatoire Royal de Belgique" (Serie A, number 115). Detailed are: its origins, its aims, its realization, the search of identifiers, the compilation of astrometric data and the related problems as well as the fundamental ties between the CCDM and the HIPPARCOS INPUT CATALOGUE (HIC). It also contains a complete bibliography of the referred papers. The contents of the general catalogue (63,463 systems) is also described as well as the conditions of its availability to the astronomical community and the projects underway for the next edition. For all these items, the user is invited to refer to this publication because hereafter only the format and the contents of the catalogue follow. To identify the systems and their components, we adopted the clever numbering process of the authors of the INDEX consisting in combining the right ascension and declination, respectively limited to 0.1 minute of time and to 1 minute of arc. In order to distinguish the CCDM numbers from the INDEX numbers - in addition to their different equinox: 2000 for the CCDM and 1900 for the INDEX - we adopted the signs + and - instead of the letters N and S for separating the coordinates. Consequently, in the INDEX and in the CCDM, one entry is devoted to a same system but the contrary to the INDEX, where a sub-entry is assigned to each group of two components, whatever the multiplicity of the system may be, the CCDM allows one sub-entry and thus one record per component. The present edition contains only the 34,031 systems (table below, part I) for which an accurate position has been found for at least one component. The catalogue extends thus much over the sample of the somewhat 14,000 systems finally retained for the HIPPARCOS INPUT CATALOGUE and assembled in its Annex 1.

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