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TYC 443-1577-1


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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:へびつかい座
Right ascension:18h10m42.95s
Declination:+05°58'46.0"
Apparent magnitude:9.225
Proper motion RA:-2.4
Proper motion Dec:-9.4
B-T magnitude:10.647
V-T magnitude:9.343

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 443-1577-1
USNO-A2.0USNO-A2 0900-11865430
HIPHIP 89069

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