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HD 87038


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VRI photometry of wide double stars with A- type primaries.
We are presenting VRI photometry of 93 wide visual double stars havinglate B- or A- type primaries, taken from the Annex of Double andMultiple Stars of the HIPPARCOS Input Catalogue. Spectral types havebeen estimated for most of the primaries and for the majority of thesecondaries. 40% of them probably have common origin components, forwhich we calculated photometric parallaxes and some orbital valuesestimates.

Giant CP stars?
This study is part of an investigation of the possibility of usingchemically peculiar (CP) stars to map local galactic structure. Correctluminosities of these stars are therefore crucial. CP stars aregenerally regarded as main-sequence or near-main-sequence objects.However, some CP stars have been classified as giants. A selection ofstars, classified in the literature as CP giants, are compared to normalstars in the same effective temperature interval and to ordinary'nongiant' CP stars. No clear confirmation of a higher luminosity for'CP giants' than for CP stars in general is found. In addition, CPcharacteristics seem to be individual properties not repeated in acomponent star or other cluster members.

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Observation and Astrometry data

Constellation:Antlia
Right ascension:10h01m51.51s
Declination:-28°40'34.0"
Apparent magnitude:8.058
Distance:134.048 parsecs
Proper motion RA:-59.1
Proper motion Dec:39.1
B-T magnitude:8.348
V-T magnitude:8.082

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 87038
TYCHO-2 2000TYC 6616-1856-1
USNO-A2.0USNO-A2 0600-13015451
HIPHIP 49146

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