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HD 19818


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관련 글

A-shell stars in the Geneva system
Among the various kinds of A stars having a peculiar spectrum, we findthe A-shell stars. Many questions are still open concerning these stars,including their evolutionary status. In the present study we have useddata from the Hipparcos catalogue to examine this point. We have foundthat the majority of A-shell stars are well above the main sequence. Nodifferences could be established between A-shell stars in luminosityclasses III and I and those in luminosity class V as regardsvariability, duplicity, or the importance of the shell feature.

Four-colour and H beta photometry of southern B stars at high galactic latitudes
Four-color and H beta photometry has been obtained for 105 early-type HDstars with galactic latitudes less than -45 deg. They are mostly late Bstars of luminosity class V to III. Two new Am stars and several Ap orBp stars are detected photometrically. Absolute magnitudes aredetermined from the photometry and from MK types where available. Theinterstellar reddening of many of the more distant stars is very small,suggesting either the existence of undetected peculiar stars in thesample or that there are areas of effectively zero reddening at highsouthern galactic latitudes.

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관측 및 측정 데이터

별자리:시계자리
적경:03h08m26.09s
적위:-59°22'25.4"
가시등급:9.064
적경상의 고유운동:0.6
적위상의 고유운동:16.8
B-T magnitude:9.2
V-T magnitude:9.076

천체목록:
일반명   (Edit)
HD 1989HD 19818
TYCHO-2 2000TYC 8498-804-1
USNO-A2.0USNO-A2 0300-00928104
HIPHIP 14595

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