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HD 145198


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Four-colour and H-beta photometry of blue stars selected from a balloon-ultraviolet survey and other sources
New uvby and/or H-beta photometry is obtained at the Chiranhigh-altitude outstation for 105 stars. Certain of the program stars areselected from a comparison of the SCAP 2000 balloon-ultraviolet skysurvey of the Laboratoire d'Astronomie Spatiale with the correspondingblue and red prints of the Palomar Observatory sky survey. Only a smallportion of these stars turn out to be B stars, whereas, the rest of thestars, which are selected from a variety of other sources, are mostly Bstars and if of normal luminosity are in many cases many Population Iscale heights from the galactic plane. It is shown that theidentification of B stars is practicable only at a good observing siteand that if H-beta photometry is also obtained, sdOB, sdB, and hothorizontal branch B stars can be distinguished from normal stars bytheir position in the beta/c(0) diagram.

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观测天体数据

星座:天龍座
右阿森松:16h06m09.73s
赤纬:+61°37'31.7"
视星:8.423
距离:320.513 天文距离
右阿森松适当运动:-8.6
赤纬适当运动:7.6
B-T magnitude:8.517
V-T magnitude:8.431

目录:
适当名称   (Edit)
HD 1989HD 145198
TYCHO-2 2000TYC 4189-436-1
USNO-A2.0USNO-A2 1500-06027259
HIPHIP 78882

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