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HD 21785


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Absolute proper motions of open clusters. I. Observational data
Mean proper motions and parallaxes of 205 open clusters were determinedfrom their member stars found in the Hipparcos Catalogue. 360 clusterswere searched for possible members, excluding nearby clusters withdistances D < 200 pc. Members were selected using ground basedinformation (photometry, radial velocity, proper motion, distance fromthe cluster centre) and information provided by Hipparcos (propermotion, parallax). Altogether 630 certain and 100 possible members werefound. A comparison of the Hipparcos parallaxes with photometricdistances of open clusters shows good agreement. The Hipparcos dataconfirm or reject the membership of several Cepheids in the studiedclusters. Tables 1 and 2 are only available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

Uvby-beta photometry of open clusters. II. NGC 1342.
Abstract image available at:http://adsabs.harvard.edu/abs/1994RMxAA..28....7P

Spectroscopic studies of stars in Per OB2.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977AJ.....82..598G&db_key=AST

Evolved stars in open clusters.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976ApJS...30..451H&db_key=AST

Distance Moduli of Open Clusters.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1965ApJS...12..215H&db_key=AST

Spectral Classification in Some Open Clusters.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1961ApJ...134..612S&db_key=AST

A Study of the II Persei Association.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1960ApJ...132...58S&db_key=AST

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Miembro de los siguientes grupos:


Datos observacionales y astrométricos

Constelación:Perseo
Ascensión Recta:03h32m01.89s
Declinación:+37°30'53.2"
Magnitud Aparente:9.193
Movimiento Propio en Ascensión Recta:0.5
Movimiento Propio en Declinación:-3.9
B-T magnitude:9.454
V-T magnitude:9.215

Catálogos y designaciones:
Nombres Propios
HD 1989HD 21785
TYCHO-2 2000TYC 2862-1034-1
USNO-A2.0USNO-A2 1275-02400791
HIPHIP 16461

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