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TYC 2531-619-1


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A kinematic and abundance survey at the galactic poles
The DDO intermediate band system is used to obtain detailed informationabout abundance gradients and velocity dispersions in the galaxy, withan emphasis on the properties of halo stars in the range of from 1 to 5kpc. The DDO abundance index is calibrated agianst (Fe/H) for metal-poorstars, with a resulting gradient of about -0.2 per kpc. However, whenthe sample is divided into two subsamples with (Fe/H) less than -0.5 andequal to or greater than -0.5, the gradients are -0.14 and 0.00,respectively. DDO observations of about 1000 stars, mostly G5-K5 giants,show that the velocity dispersion increases both with decrease inmetallicity and increase in z distance. The abundances found for high-zstars are similar to the A-star results of Rodgers (1971) in that abouthalf the K giants above 1 kpc appear to have solar abundances.

UBVRI photometry of north galactic pole K giants
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970AJ.....75..971H&db_key=AST

The space distribution of late type stars in a North galactic pole region.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1962AJ.....67...37U&db_key=AST

Investigations on the stars in high galactic latitudes. III. Spectrophotometric analysis of about 3000 stars down to the photographic magnitude 13.5.
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Dades d'Observació i Astrometria

Constel·lació:Coma Berenices
Ascensió Recta:12h44m08.52s
Declinació:+30°09'05.8"
Magnitud Aparent:9.815
Moviment propi RA:1.9
Moviment propi Dec:-33.8
B-T magnitude:11.23
V-T magnitude:9.932

Catàlegs i designacions:
Noms Propis   (Edit)
TYCHO-2 2000TYC 2531-619-1
USNO-A2.0USNO-A2 1200-06943754
HIPHIP 62139
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