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HD 78027


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A Search for Star Clusters from the HIPPARCOS Data
We present results of a search for nearby star clusters and associationsusing Hipparcos Catalogue data, restricting the sample to stars withparallaxes above 2 mas (d <~ 500 pc). Two new OB associations havebeen identified in the Carina-Vela and Cepheus-Cygnus-Lyra-Vulpecularegions. A very probable new open cluster has been discovered in Carina.The cluster, a Car, named after its brightest member, is young (60 Myr)and nearby (d = 132 pc). However, only seven bona fide members can bedrawn from the Hipparcos data. We report a detection of nine opencluster candidates in the distance range of 150 to 400 pc, and sixpossible associations almost all located within the Gould belt, althoughslightly older than the known nearby associations. In all cases, wepresent Yale theoretical isochrone fits to the color-magnitude diagrams,which indicate a moderate spread of ages between 60 to 200 Myr.Evidently, these young open cluster and association candidates arerelated to the overall distribution of young OB and A-type stars in thesolar neighborhood.

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观测天体数据

星座:船底座
右阿森松:09h03m23.11s
赤纬:-57°45'59.1"
视星:7.883
距离:129.702 天文距离
右阿森松适当运动:-12.6
赤纬适当运动:16.1
B-T magnitude:8.055
V-T magnitude:7.898

目录:
适当名称   (Edit)
HD 1989HD 78027
TYCHO-2 2000TYC 8590-472-1
USNO-A2.0USNO-A2 0300-05723946
HIPHIP 44453

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