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TYC 2818-449-1


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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:Ανδρομέδα
Right ascension:01h39m39.18s
Declination:+40°35'01.4"
Apparent magnitude:9.099
Proper motion RA:24.3
Proper motion Dec:-12.4
B-T magnitude:10.581
V-T magnitude:9.222

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 2818-449-1
USNO-A2.0USNO-A2 1275-00985733
HIPHIP 7738

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