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HD 20077


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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

Measurements of 258 radial velocities in two fields near Alpha Per
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...68..515F&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

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Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Perseo
Ascensione retta:03h15m22.97s
Declinazione:+47°16'41.7"
Magnitudine apparente:9.053
Moto proprio RA:12.4
Moto proprio Dec:-13.7
B-T magnitude:9.35
V-T magnitude:9.078

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 20077
TYCHO-2 2000TYC 3315-366-1
USNO-A2.0USNO-A2 1350-03216799
HIPHIP 15159

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