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HD 150704


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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:Τρίγωνον Νότιον
Right ascension:16h47m30.29s
Declination:-66°04'21.4"
Apparent magnitude:8.347
Distance:357.143 parsecs
Proper motion RA:13.5
Proper motion Dec:-6.1
B-T magnitude:9.414
V-T magnitude:8.436

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 150704
TYCHO-2 2000TYC 9050-2094-1
USNO-A2.0USNO-A2 0225-26224873
HIPHIP 82192

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