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HD 174217


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A classification of Be stars
Based upon a sample of 140 stars observed over 20 years for which about5,000 spectrograms are available, a classification scheme of Be stars ispresented. This is the first attempt to subdivide the Be star group intophysically significant subgroups, from which typical objects can beselected for further study. The four groups proposed are based upon adiscussion of spectrum characteristics, multicolor photometry,polarization, rotational velocities, UV spectral types and timevariability. Starting with the group membership of a Be star,predictions can be made of the future behavior of it.

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观测天体数据

星座:南冕座
右阿森松:18h51m05.97s
赤纬:-37°14'52.1"
视星:7.563
距离:746.269 天文距离
右阿森松适当运动:1.7
赤纬适当运动:2.4
B-T magnitude:9.439
V-T magnitude:7.718

目录:
适当名称
HD 1989HD 174217
TYCHO-2 2000TYC 7420-1345-1
USNO-A2.0USNO-A2 0525-38640860
HIPHIP 92502

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