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HD 81209


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BVR Photometry of Northern Hemisphere Luminous Stars. III. LS and HD Stars
CCD-based BVR photometry of 48 previously unobserved stars drawn fromvolumes V and VI of the Luminous Stars in the Northern Milky Way,Luminous Stars in the Southern Milky Way, and HD catalogs is reported.

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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Сазвежђа:Лав
Ректацензија:09h25m07.97s
Deклинација:+29°32'49.0"
Apparent магнитуда:8.801
Даљина:1219.512 parsecs
Proper motion RA:-25.3
Proper motion Dec:4.1
B-T magnitude:8.912
V-T magnitude:8.811

Каталог и designations:
Proper имена
HD 1989HD 81209
TYCHO-2 2000TYC 1958-776-1
USNO-A2.0USNO-A2 1125-05893041
HIPHIP 46195

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