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HD 123307


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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:Vierge
Right ascension:14h07m13.85s
Declination:-16°11'25.7"
Apparent magnitude:7.267
Distance:230.947 parsecs
Proper motion RA:-38.7
Proper motion Dec:-6.9
B-T magnitude:7.276
V-T magnitude:7.268

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 123307
TYCHO-2 2000TYC 6137-378-1
USNO-A2.0USNO-A2 0675-13074342
HIPHIP 68970

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