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HD 95999


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A revised effective-temperature calibration for the DDO photometric system
A revised effective-temperature calibration for the David DunlapObservatory (DDO) photometric system is presented. Recently publishedphotometric and spectroscopic observations of field and open-cluster Gand K stars allow a better definition of the solar-abundance fiducialrelation in the DDO C0(45-48) vs. C0(42-45)diagram. The ability of the DDO system to predict MK spectral types of Gand K giants is demonstrated. The new DDO effective temperaturecalibration reproduces satisfactorily the infrared temperature scale ofBell and Gustafsson (1989). It is shown that Osborn's (1979) calibrationunderestimates the effective temperatures of K giants by approximately170 K and those of late-type dwarfs by approximately 150 K.

Untersuchungen an Farbenindizes II. Mit 1 Textabbildung
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Observation and Astrometry data

Constellation:Carina
Right ascension:11h02m24.87s
Declination:-73°27'40.0"
Apparent magnitude:8.686
Distance:392.157 parsecs
Proper motion RA:-11.2
Proper motion Dec:7.1
B-T magnitude:9.996
V-T magnitude:8.795

Catalogs and designations:
Proper Names
HD 1989HD 95999
TYCHO-2 2000TYC 9224-1361-1
USNO-A2.0USNO-A2 0150-07969451
HIPHIP 53966

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