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TYC 6568-2698-1


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NGC 2571: An intermediate-age open cluster with a White Dwarf candidate
CCD UBVI imaging photometry was carried out in the field of the opencluster NGC 2571. From the analysis of our data we state the cluster isat a distance of 1380 +/- 130 pc and its age is 50 +/- 10 x106 yr. The cluster mass function has a slope larger than atypical Salpeter's law. There are two notorious features in NGC 2571:the cluster contains a high proportion of stars located below thereference line that are serious candidates to be metallic line stars(probably Am-Fm), and shows also a sharp gap along its main sequencethat cannot be explained by a random process nor by a biased rejectionof cluster members. A striking blue object was detected in the clusterfield that could be a white dwarf candidate. Based on observationscollected at the European Southern Observatory ESO at La Silla, Chile.

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

Basic parameters of the open cluster NGC 2571.
Abstract image available at:http://adsabs.harvard.edu/abs/1976PASP...88..225C

The open clusters NGC 2533, NGC 2567, NGC 2571, and Ru 58
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Observation and Astrometry data

Constellation:とも座
Right ascension:08h18m46.62s
Declination:-29°45'01.1"
Apparent magnitude:10.83
Proper motion RA:-4.9
Proper motion Dec:2.3
B-T magnitude:10.807
V-T magnitude:10.829

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 6568-2698-1
USNO-A2.0USNO-A2 0600-09862232
HIPHIP 40730

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