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HD 160989


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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:Sagittaire
Right ascension:17h43m56.51s
Declination:-22°45'42.9"
Apparent magnitude:8.661
Distance:327.869 parsecs
Proper motion RA:8.6
Proper motion Dec:0.2
B-T magnitude:10.239
V-T magnitude:8.792

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 160989
TYCHO-2 2000TYC 6828-811-1
USNO-A2.0USNO-A2 0600-28408993
HIPHIP 86778

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