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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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Observation and Astrometry data

Constellation:Draco
Right ascension:16h06m09.73s
Declination:+61°37'31.7"
Apparent magnitude:8.423
Distance:320.513 parsecs
Proper motion RA:-8.6
Proper motion Dec:7.6
B-T magnitude:8.517
V-T magnitude:8.431

Catalogs and designations:
Proper Names
HD 1989HD 145198
TYCHO-2 2000TYC 4189-436-1
USNO-A2.0USNO-A2 1500-06027259
HIPHIP 78882

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