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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
| Photometric analysis of the young open cluster HOGG 16
With UBVRI photoelectric photometry, the open cluster Hogg 16 wasinvestigated. The data analysis shows that the cluster is composed by apoor concentrated central star group of 4 arcmin radius around theCPD-60 deg 4703 star, even though some members may be still found at adistance of 10 arcmin from it. A mean color excess, E(B - V) = 0.44, anda true distance modulus V(O) - M(V) = 11.65, equivalent to a distance ofd = 2130 pc, were derived. So the cluster is placed within theSagittarius arm. Its 'turn-off' point agrees with an age of (25.8 +/-1.5) x 10 exp 6 yr while from core overshooting models it results to be23 x 10 exp 6 yr old. A possible relation with the open cluster Cr 272is briefly discussed.
| Discoveries on Southern Red Sensitive Objective-Prism Plates - Part Three - New Stars Having Hα in Emission
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1981A&AS...44..387M&db_key=AST
| A spectral survey of the southern Milky Way 1 : general description and catalogue 1 (l=306 -318 degrees).
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...16..445S&db_key=AST
| Magnitudes and colors for 833 Northern and Southern stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1955AJ.....60...65E&db_key=AST
| Further observations of magnitude with a coarse grating
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952MNRAS.112..665W&db_key=AST
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Centauro |
| Ascensione retta: | 13h28m01.50s |
| Declinazione: | -61°03'45.0" |
| Magnitudine apparente: | 7.302 |
| Distanza: | 378.788 parsec |
| Moto proprio RA: | -9.7 |
| Moto proprio Dec: | -3.7 |
| B-T magnitude: | 7.333 |
| V-T magnitude: | 7.305 |
Cataloghi e designazioni:
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