Home     Getting Started     To Survive in the Universe    
Inhabited Sky
    News@Sky     Astro Photo     The Collection     Forum     Blog New!     FAQ     Press     Login  

HD 161218


Contents

Images

Upload your image

DSS Images   Other Images


Related articles

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.

Submit a new article


Related links

  • - No Links Found -
Submit a new link


Member of following groups:


Observation and Astrometry data

Constellation:Altar
Right ascension:17h47m32.85s
Declination:-56°09'57.5"
Apparent magnitude:7.369
Distance:89.928 parsecs
Proper motion RA:7.1
Proper motion Dec:-8.5
B-T magnitude:7.824
V-T magnitude:7.407

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 161218
TYCHO-2 2000TYC 8746-2721-1
USNO-A2.0USNO-A2 0300-32655084
HIPHIP 87070

→ Request more catalogs and designations from VizieR