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HD 65533


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Inaccuracies in the spectral classification of stars from the Tycho-2 Spectral Type Catalogue
We compare the spectroscopic and trigonometric parallaxes of commonstars from the Tycho-2 Spectral Type and Hipparcos Catalogues. Thiscomparison has revealed that the distance estimations for theoverwhelming majority of stars by both methods yield very similarresults. However, there is a small fraction of stars for which thedistance estimates differ significantly. It is these stars that are thesubject of our study. We have been able to find the causes of thesedifferences.

SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.

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Observation and Astrometry data

Constellation:とも座
Right ascension:07h57m48.89s
Declination:-34°55'42.1"
Apparent magnitude:7.785
Distance:349.65 parsecs
Proper motion RA:-4.9
Proper motion Dec:0.9
B-T magnitude:9.561
V-T magnitude:7.932

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 65533
TYCHO-2 2000TYC 7128-1434-1
USNO-A2.0USNO-A2 0525-06838368
HIPHIP 38913

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