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HD 8769


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Photometric and kinematic studies of open star clusters. I. NGC 581 (M 103)
We present CCD photometry and a proper motion study of the young openstar cluster, NGC 581 (M 103). Fitting isochrones to the colourmagnitude diagram, we found an age of 16 +/- 4 Myr and a distance ofroughly 3 kpc for this cluster. The proper motion study identifies 77stars of V=14.5 mag or brighter to be cluster members. We combinemembership determination by proper motions and statistical field starsubtraction to derive the IMF of the cluster and find a quite steepslope of Gamma =-1.80.

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.

La mesure des vitesses radiales au prisme objectif. IX - 3e liste de vitesses radiales déterminées au prisme objectif à vision directe
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Étude spectrophotométrique et statistique d'une région obscure dans Cassiopée
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Observation and Astrometry data

Constellation:Cassiopée
Right ascension:01h28m01.21s
Declination:+61°19'30.0"
Apparent magnitude:9.311
Proper motion RA:10.9
Proper motion Dec:-9.2
B-T magnitude:9.401
V-T magnitude:9.319

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 8769
TYCHO-2 2000TYC 4031-707-1
USNO-A2.0USNO-A2 1500-01478864
HIPHIP 6841
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