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HD 30523


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Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample
We are obtaining spectra, spectral types, and basic physical parametersfor the nearly 3600 dwarf and giant stars earlier than M0 in theHipparcos catalog within 40 pc of the Sun. Here we report on resultsfor 1676 stars in the southern hemisphere observed at Cerro TololoInter-American Observatory and Steward Observatory. These resultsinclude new, precise, homogeneous spectral types, basic physicalparameters (including the effective temperature, surface gravity, andmetallicity [M/H]), and measures of the chromospheric activity of ourprogram stars. We include notes on astrophysically interesting stars inthis sample, the metallicity distribution of the solar neighborhood, anda table of solar analogs. We also demonstrate that the bimodal nature ofthe distribution of the chromospheric activity parameterlogR'HK depends strongly on the metallicity, andwe explore the nature of the ``low-metallicity'' chromosphericallyactive K-type dwarfs.

Preliminary Version of the Third Catalogue of Nearby Stars
Not Available

Dwarf K and M stars in the southern hemisphere.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972AJ.....77..486U&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Eridano
Ascensione retta:04h48m01.14s
Declinazione:-10°56'01.1"
Magnitudine apparente:9.431
Distanza:26.11 parsec
Moto proprio RA:81.7
Moto proprio Dec:-109.5
B-T magnitude:11.002
V-T magnitude:9.561

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 30523
TYCHO-2 2000TYC 5325-1952-1
USNO-A2.0USNO-A2 0750-01104729
HIPHIP 22288

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