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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: | Bilancia |
| Ascensione retta: | 14h58m52.76s |
| Declinazione: | -15°26'10.9" |
| Magnitudine apparente: | 8.586 |
| Distanza: | 384.615 parsec |
| Moto proprio RA: | -0.4 |
| Moto proprio Dec: | -20.4 |
| B-T magnitude: | 10.278 |
| V-T magnitude: | 8.726 |
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