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HD 221397


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A survey of F-type stars
The results of a spectroscopic survey of 350 F-type stars at adispersion of 80 A/mm are presented. Twenty-two percent of the starsshow degree of metal line weakening; this result parallels that ofphotometric investigations in the uvby Beta system. The line weakeningparameter introduced correlates strongly with photometric indices andwith abundance anomalies established by theoreticians of stellaratmospheres. The classification can thus be used to easily select starswith underabundances stronger than a factor four with respect to thesun.

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观测天体数据

星座:寶瓶座
右阿森松:23h31m56.30s
赤纬:-10°59'40.5"
视星:8.758
距离:284.9 天文距离
右阿森松适当运动:9.7
赤纬适当运动:-4.4
B-T magnitude:9.963
V-T magnitude:8.858

目录:
适当名称   (Edit)
HD 1989HD 221397
TYCHO-2 2000TYC 5832-210-1
USNO-A2.0USNO-A2 0750-21498577
HIPHIP 116143

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