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HD 13225


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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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Osservazione e dati astrometrici

Costellazione:Ariete
Ascensione retta:02h09m50.91s
Declinazione:+26°29'04.3"
Magnitudine apparente:8.524
Distanza:228.833 parsec
Moto proprio RA:20
Moto proprio Dec:-10.2
B-T magnitude:9.083
V-T magnitude:8.571

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 13225
TYCHO-2 2000TYC 1761-970-1
USNO-A2.0USNO-A2 1125-00694719
HIPHIP 10098

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