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HD 188304


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The nature of some doubtful open clusters as revealed by HIPPARCOS
We discuss the nature of some galactic open clusters by using propermotions and parallaxes from the Hipparcos and ACT catalogues. We showthat the clusters Collinder 399, Upgren 1, NGC 1252 and Melotte 227 donot exist. Collinder 132 is found to be mainly composed out of membersof an OB association, but there may be a star cluster present in thisarea too. Roeser & Bastian (1994) proposed that NGC 2451 consists oftwo star clusters. We show that NGC 2451 A definitively does exist, NGC2451 B may exist. A star cluster may also be present in the area ofRoslund 5. The Hipparcos data finally confirm the reality of Collinder135.

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观测天体数据

星座:南極座
右阿森松:20h03m49.72s
赤纬:-78°15'46.0"
视星:8.383
距离:275.482 天文距离
右阿森松适当运动:28.7
赤纬适当运动:8.2
B-T magnitude:9.739
V-T magnitude:8.495

目录:
适当名称   (Edit)
HD 1989HD 188304
TYCHO-2 2000TYC 9464-1607-1
USNO-A2.0USNO-A2 0075-06526390
HIPHIP 98789

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