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HD 157465


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Photoelectric Vilnius Photometry of Hipparcos Turn-Off Region Stars
Seven-color photometry in the Vilnius system and photometricclassification in terms of spectral type, absolute magnitude andmetallicity are presented for 145 Hipparcos stars of the turn-offregion, most of which have parallaxes determined to an accuracy of atleast 15%. The stars selected for the observing program included thoseidentified kinematically as intermediate between the thin disk and halo,plus a number of weak-lined stars discovered previously from objectiveprism surveys. The metallicity distribution we find for a kinematicallydefined sample of possible members of the thick disk has a meanabundance [Fe/H]= --0.3 dex and a dispersion of 0.3 dex. Our data seemto suggest a large age for this intermediate population.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Herkul
Sað Açýklýk:17h22m05.04s
Yükselim:+31°59'14.9"
Görünürdeki Parlaklýk:8.232
Uzaklýk:94.251 parsek
özdevim Sað Açýklýk:-11.1
özdevim Yükselim:42
B-T magnitude:8.869
V-T magnitude:8.285

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 157465
TYCHO-2 2000TYC 2596-284-1
USNO-A2.0USNO-A2 1200-08352273
HIPHIP 84977

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