ADC Dataset: I/211 -- Catalogue of the Components of Double, Multiple stars (CCDM) first edition (1994)

Source Reference(s):
Comm. Obs. R. Belgique, Ser. A, N. 115, 1994 (ADS: 1994CoORB.115....1D)

Description of Dataset:

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.

See Also:

Dataset: I/196: Hipparcos Input Catalogue (Turon+ 1993)

Table File Information:

1211_catalog.dat - The Catalogue
View this Data Download via FTP

Field	Label	Units	Format	Definition
1	CCDM	---	A10	(Catalogue of the Components of the Double and Multiple stars) number (1)^(1-1-1)
2	rComp	---	A1	*[B-Z?] Reference component (blank if A)^(g)
3	Comp	---	A1	*[A-Z?] Concerned component^(g)
4	Note1	---	A1	[] =orbit in Dommanget's personal cat. (2)^(1-1-2)
5	Note2	---	A1	[@] @ = astrometric binary
6	Disc	---	A7	Name of the pair (Discoverer and Number)
7	dRAs	s	F7.2	? Remainder of RA in second of time;
8	dDEs	arcsec	F7.1	? Remainder of DE in arcsecond;
9	r_dRAs	---	I2	? Source code for positions (3)^(1-1-3)
10	Year	yr	I4	? Year of measured relative position
11	theta	deg	A3	Position angle (degrees) (4)^(1-1-4)
12	rho	arcsec	F6.1	? angular separation of Comp along theta
13	Obs	---	I2	? for A component: number of components; other component: number of measurements
14	Vmag	mag	F4.1	? magnitude
15	Sp	---	A2	spectrum
16	pmNote	---	A1	[@$] Origin of the proper motion^(f)
17	pmRA	mas/yr	I5	? annual proper motion in 0"001
18	pmDE	mas/yr	I5	? annual proper motion in 0"001
19	DM	---	A10	First identification = DM (Harvard system) (5)^(1-1-5)
20	Name2	---	A10	Second identification (5)^(1-1-5)
21	HD	---	A6	HD designation
22	m_HD	---	A2	[/0-9 ] second HD (Example: 131843/4)
23	ADS/BDS	---	A6	ADS number (A) or BDS number (B)
24	m_ADS/BDS	---	A1	[a] suffix (a) to an inserted ADS number
25	n_IDS	---	A1	[] The means that the Index number is built for new component or system;
26	IDS	---	A11	Uncorrected Index designation (1976.5) (equinox 1900) and identification letter;
27	HIC	---	I6	? Hipparcos Input Catalogue (Turon et al.) number

	^(1-1-1)The CCDM number is made with RA(2000) limited to 0.1 minute of time (HHMMm) and Dec(2000) limited to 1 minute of a degree (+DDMM). Full details about the construction of the CCDM number are given in the publication.
	^(g) In one record there appear '?' signs for (CCDM#=) 07366-1428
	^(1-1-2)The personal catalogue of J.Dommanget (1982; partially updated to 1994)
	^(1-1-3)See the document file, part III
	^(1-1-4)The following letters are sometimes used to indicate an approximate location of the secondary component: 'N' (to the North) 'NF'(to the North and following) (first quadrant) 'F' (following) 'SF'(to the South and following) (second quadrant) 'S' (to the South) 'SP'(to the South and preceding) (third quadrant) 'P' (preceding) 'NP'(to the North and preceding) (fourth quadrant)
	^(f) *: not the pm from the Index; @: pm from the HIC; $: pm = pm(B/A);
	^(1-1-5).0 = BD .6 = AGK2/3 .2 = CD .8 = SAO .4 = CPD The suffixes "a" and "b" following some DM designations appear in place of the dot.

Non-tabular Files:

File Name	File Type	Description	Access Methods
1211_ccdm.doc	text	Documentation	FTP