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HD 197941


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Classification of Population II Stars in the Vilnius Photometric System. II. Results
The results of photometric classification of 848 true and suspectedPopulation II stars, some of which were found to belong to Population I,are presented. The stars were classified using a new calibrationdescribed in Paper I (Bartkevicius & Lazauskaite 1996). We combinethese results with our results from Paper I and discuss in greaterdetail the following groups of stars: UU Herculis-type stars and otherhigh-galactic-latitude supergiants, field red horizontal-branch stars,metal-deficient visual binaries, metal-deficient subgiants, stars fromthe Catalogue of Metal-deficient F--M Stars Classified Photometrically(MDPH; Bartkevicius 1993) and stars from one of the HIPPARCOS programs(Bartkevicius 1994a). It is confirmed that high galactic latitudesupergiants from the Bartaya (1979) catalog are giants or even dwarfs.Some stars, identified by Rose (1985) and Tautvaisiene (1996a) as fieldRHB stars, appear to be ordinary giants according to our classification.Some of the visual binaries studied can be considered as physical pairs.Quite a large fraction of stars from the MDPH catalog are found to havesolar metallicity. A number of new possible UU Herculis-type stars, RHBstars and metal-deficient subgiants are identified.

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Dades d'Observació i Astrometria

Constel·lació:Delphinus
Ascensió Recta:20h46m28.80s
Declinació:+11°12'25.6"
Magnitud Aparent:8.853
Distancia:1162.791 parsecs
Moviment propi RA:3.5
Moviment propi Dec:-9.2
B-T magnitude:10.691
V-T magnitude:9.005

Catàlegs i designacions:
Noms Propis
HD 1989HD 197941
TYCHO-2 2000TYC 1093-1247-1
USNO-A2.0USNO-A2 0975-19584084
HIPHIP 102510

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