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HD 17842


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Geneva intrinsic colours of the supergiants of spectral types A and F
The aim of this research note is to expose a photometric method todetermine the intrinsic values of the Geneva color index (B2-V1) for thesupergiants of spectral types A and F. The different stages which led tothis objective are presented, and the method is tested with a few starsbelonging to clusters for which color excesses were found in theliterature. A list of stars classified as supergiants which behavephotometrically as dwarfs is indicated.

Vitesse radiales dans 5 Selected Areas.
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观测天体数据

星座:鯨魚座
右阿森松:02h52m00.45s
赤纬:+01°17'26.7"
视星:9.171
右阿森松适当运动:22.9
赤纬适当运动:5.7
B-T magnitude:9.622
V-T magnitude:9.209

目录:
适当名称   (Edit)
HD 1989HD 17842
TYCHO-2 2000TYC 48-498-1
USNO-A2.0USNO-A2 0900-00668230

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