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HD 221175


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Bright Metal-poor Stars from the Hamburg/ESO Survey. I. Selection and Follow-up Observations from 329 Fields
We present a sample of 1777 bright (91.0) metal-poor([Fe/H]<-2.0) giants of 9%+/-2%, which is lower than previouslyreported. However, the frequency rises to similar (>20%) and highervalues with increasing distance from the Galactic plane. Although thenumbers of stars at low metallicity are falling rapidly at the lowestmetallicities, there is evidence that the fraction of carbon-enhancedmetal-poor stars is increasing rapidly as a function of decliningmetallicity. For ~60 objects, high-resolution data have already beenobtained; one of these, HE 1327-2326, is the new record holder for themost iron-deficient star known.

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Observation and Astrometry data

Constellation:ほうおう座
Right ascension:23h30m00.61s
Declination:-41°47'17.2"
Apparent magnitude:9.665
Proper motion RA:-5.9
Proper motion Dec:-29.3
B-T magnitude:10.264
V-T magnitude:9.715

Catalogs and designations:
Proper Names
HD 1989HD 221175
TYCHO-2 2000TYC 8016-788-1
USNO-A2.0USNO-A2 0450-40644495
HIPHIP 115989

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