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HD 100190


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Population studies. IV - The Rose 'red horizontal branch' candidates as probes of the thick disk
DDO observations are reported for 10 of the Upgren (1962) red giantswhich Rose (1985) has identified as red horizontal branch (RHB) stars ofa globular cluster type population in the Gilmore-Reid thick disk. It isshown here that, while in the final analysis Rose's hypothesis may becorrect, it is not unique, and that his RHB candidates have all thecharacteristics of clump stars in the old, metal-deficient, open clusterNGC 2243. The only way to test Rose's hypothesis in an unambiguous wayis to analyze a complete sample of stars having colors in the range B-Vbetween 0.7 and 0.95, rather than one chosen by spectral-type criteria.

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관측 및 측정 데이터

별자리:켄타우루스자리
적경:11h31m24.77s
적위:-41°32'42.6"
가시등급:8.27
거리:122.249 파섹
적경상의 고유운동:-101.6
적위상의 고유운동:57.4
B-T magnitude:9.62
V-T magnitude:8.382

천체목록:
일반명   (Edit)
HD 1989HD 100190
TYCHO-2 2000TYC 7748-1592-1
USNO-A2.0USNO-A2 0450-13063468
HIPHIP 56215

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