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HD 150066


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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:Ophiucus
Right ascension:16h38m40.69s
Declination:-01°11'01.7"
Apparent magnitude:7.952
Distance:167.785 parsecs
Proper motion RA:-24.3
Proper motion Dec:-8.3
B-T magnitude:9.282
V-T magnitude:8.062

Catalogs and designations:
Proper Names
HD 1989HD 150066
TYCHO-2 2000TYC 5049-745-1
USNO-A2.0USNO-A2 0825-09530429
HIPHIP 81491

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