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HD 189921


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Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.

Equivalent widths and rotational velocities of southern early-type stars
Not Available

UV excess stars and radio sources in the Aquila ring.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&A....31..207I&db_key=AST

On the reality of the stellar ring in Aql.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971A&A....13...71P&db_key=AST

Lichtelectrische Untersuchungen eines nahen Sternringes in Aql.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969A&A.....3..210I&db_key=AST

Distances of southern B-stars and galactic structure from Hγ-luminosities
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1961MNRAS.123..191B&db_key=AST

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Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:Aquila
Ascensione retta:20h02m10.32s
Declinazione:+10°44'20.2"
Magnitudine apparente:6.977
Distanza:325.733 parsec
Moto proprio RA:-1.2
Moto proprio Dec:-10.5
B-T magnitude:6.861
V-T magnitude:6.968

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 189921
TYCHO-2 2000TYC 1075-3272-1
USNO-A2.0USNO-A2 0975-17614277
HIPHIP 98641
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