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HD 188770


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Photoelectric Vilnius Photometry of Hipparcos Turn-Off Region Stars
Seven-color photometry in the Vilnius system and photometricclassification in terms of spectral type, absolute magnitude andmetallicity are presented for 145 Hipparcos stars of the turn-offregion, most of which have parallaxes determined to an accuracy of atleast 15%. The stars selected for the observing program included thoseidentified kinematically as intermediate between the thin disk and halo,plus a number of weak-lined stars discovered previously from objectiveprism surveys. The metallicity distribution we find for a kinematicallydefined sample of possible members of the thick disk has a meanabundance [Fe/H]= --0.3 dex and a dispersion of 0.3 dex. Our data seemto suggest a large age for this intermediate population.

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Observation and Astrometry data

Constellation:くじゃく座
Right ascension:20h01m50.98s
Declination:-69°01'23.0"
Apparent magnitude:10.054
Proper motion RA:-3.6
Proper motion Dec:11.6
B-T magnitude:10.451
V-T magnitude:10.087

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 188770
TYCHO-2 2000TYC 9307-1839-1
USNO-A2.0USNO-A2 0150-19303859
HIPHIP 98618

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