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HD 191675


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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.

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Observation and Astrometry data

Constellation:わし座
Right ascension:20h11m23.59s
Declination:-07°12'55.2"
Apparent magnitude:8.096
Distance:373.134 parsecs
Proper motion RA:12.2
Proper motion Dec:-5.9
B-T magnitude:9.548
V-T magnitude:8.216

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 191675
TYCHO-2 2000TYC 5173-145-1
USNO-A2.0USNO-A2 0825-17852546
HIPHIP 99482

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