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HD 144947


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Ca II H and K Photometry on the UVBY System. III. The Metallicity Calibration for the Red Giants
New photometry on the uvby Ca system is presented for over 300 stars.When combined with previous data, the sample is used to calibrate themetallicity dependence of the hk index for cooler, evolved stars. Themetallicity scale is based upon the standardized merger of spectroscopicabundances from 38 studies since 1983, providing an overlap of 122evolved stars with the photometric catalog. The hk index producesreliable abundances for stars in the [Fe/H] range from -0.8 to -3.4,losing sensitivity among cooler stars due to saturation effects athigher [Fe/H], as expected.

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Observation and Astrometry data

Constellation:Règle
Right ascension:16h10m18.97s
Declination:-43°39'23.7"
Apparent magnitude:8.376
Distance:186.916 parsecs
Proper motion RA:14.8
Proper motion Dec:-9
B-T magnitude:9.747
V-T magnitude:8.49

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 144947
TYCHO-2 2000TYC 7864-935-1
USNO-A2.0USNO-A2 0450-23328627
HIPHIP 79243

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