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HD 68060


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The chemical evolution of the solar neighborhood. I - A bias-free reduction technique and data sample
The possible ways of measuring the age-metallicity relation for thegalactic disk in the neighborhood of the sun are discussed. It is shownthat the use of a field star sample chosen on the basis of effectivetemperature introduces a bias which results in a monotonic increase inthe metal abundance of the disk with time. However, if theage-metallicity relation for the disk can be shown to satisfy certaincriteria, the bias introduced in such a sample can be neglected: thegalactic disk apparently satisfies the criteria. It is concluded that asample analyzed through the use of uvby and H(beta) photometry inconjunction with a self-consistent set of theoretical isochronesprovides the least biased, most accurate estimate of the age-metallicityrelation for the disk.

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Observation and Astrometry data

Constellation:Octans
Right ascension:07h53m29.35s
Declination:-83°43'18.4"
Apparent magnitude:8.175
Distance:170.068 parsecs
Proper motion RA:-10.2
Proper motion Dec:35.1
B-T magnitude:8.468
V-T magnitude:8.2

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 68060
TYCHO-2 2000TYC 9493-910-1
USNO-A2.0USNO-A2 0000-00515897
HIPHIP 38537

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