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TYC 3574-411-1


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2MASS Two-Color Interstellar Reddening Line in the Direction of the North America and Pelican Nebulae and the CYG OB2 Association
The slope of the interstellar reddening line in the J--H vs.H--Ks diagram of the 2MASS survey in the direction of theNorth America and Pelican nebulae, the L 935 dust cloud and the Cyg OB2association is determined. The MK types were either classified by C. J.Corbally or collected from the literature. The ratioEJ-H/EH-K_s = 2.0 is obtained by taking theaverage for the four groups of spectral classes: O3--B1, B2--B6,B7--B9.5 and red clump giants. The obtained ratio is among the largestvalues of EJ-H/EH-K_s determined till now.

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.

Photoelectric Photometry of Stars in the Vilnius System in the Area of the North America and Pelican Nebulae
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La mesure des vitesses radiales au prisme objectif. XII. 5ème Liste de vitesses radiales déterminées au prisme objectif à vision directe
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Datos observacionales y astrométricos

Constelación:Cisne
Ascensión Recta:20h47m36.85s
Declinación:+45°40'29.3"
Magnitud Aparente:9.605
Movimiento Propio en Ascensión Recta:0.9
Movimiento Propio en Declinación:3
B-T magnitude:9.722
V-T magnitude:9.615

Catálogos y designaciones:
Nombres Propios   (Edit)
TYCHO-2 2000TYC 3574-411-1
USNO-A2.0USNO-A2 1350-12927619
HIPHIP 102609
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