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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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Osservazione e dati astrometrici
Costellazione: | Centauro |
Ascensione retta: | 14h59m34.05s |
Declinazione: | -41°10'18.7" |
Magnitudine apparente: | 9.322 |
Moto proprio RA: | -31.5 |
Moto proprio Dec: | -16.4 |
B-T magnitude: | 11.165 |
V-T magnitude: | 9.475 |
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