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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
| SAO stars with infrared excess in the IRAS Point Source Catalog
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| Hyades and Sirius supercluster members brighter than magnitude(V) 7.1. I - The first six hours of right ascension
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| TW Horologii and NGC 1252 - A rebuttal
The Bouchet and The(1983) suggestion that the carbon variable TW Hor isa member of the open cluster NGC 1252 is questioned on the basis of CapeZone Catalog data for the ten stars observed by them. The most probablemembership for the variable is presently held to be in the HyadesSupercluster, and a distance modulus of 7.7 mag is given. Bouchet andThe's derived distance of 500 parsecs would place NGC 1252 400 pc abovethe galactic plane, which is higher than might be expected for what theyregard as a young disk cluster.
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Miembro de los siguientes grupos:
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Datos observacionales y astrométricos
| Constelación: | Reloj |
| Ascensión Recta: | 03h10m39.25s |
| Declinación: | -57°48'35.3" |
| Magnitud Aparente: | 6.63 |
| Distancia: | 182.482 parsecs |
| Movimiento Propio en Ascensión Recta: | 8.2 |
| Movimiento Propio en Declinación: | 1.8 |
| B-T magnitude: | 7.729 |
| V-T magnitude: | 6.721 |
Catálogos y designaciones:
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