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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: | ほうおう座 |
| Right ascension: | 01h03m10.62s |
| Declination: | -50°41'01.1" |
| Apparent magnitude: | 9.489 |
| Proper motion RA: | -3.2 |
| Proper motion Dec: | -22.7 |
| B-T magnitude: | 11.285 |
| V-T magnitude: | 9.638 |
Catalogs and designations:
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