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HD 105194


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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

Space distribution of stars in the southern Milky Way. III - A region in Centaurus-Crux
Objective prism and photometric data on about 8000 stars of commonphotometric type and 158 OB stars are used to derive the space density,at various distances, of stars in several spectral-type groupings. At adistance of about 350 parsecs, a pronounced maximum is noted in thenumbers of B8-A1 stars and G-K giants. Indications are also found of amaximum in the OB star distribution at a distance of the order of 2500kpc. There is a sharp decrease in the numbers of later-type dwarfs withincreasing distance from the sun, although the data in question are onlyreliable for a few hundred parsecs.

Photometry of NGC 4103
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1969MNRAS.146..329W&db_key=AST

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观测天体数据

星座:南十字座
右阿森松:12h06m48.27s
赤纬:-61°11'17.7"
视星:9.264
右阿森松适当运动:-12.2
赤纬适当运动:-3.5
B-T magnitude:9.381
V-T magnitude:9.274

目录:
适当名称   (Edit)
HD 1989HD 105194
TYCHO-2 2000TYC 8974-1298-1
USNO-A2.0USNO-A2 0225-13257013
HIPHIP 59069

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