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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.
| UVBY observations of A, F, G and K field stars
Photoelectric data in the uvby system have been obtained for about 800southern stars of the Hipparcos Input Catalog (Grenon, 1982, 1985). Mostof the stars are F and G main sequence and fall in the magnitude range V= 8-11.
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Osservazione e dati astrometrici
| Costellazione: | Scorpione |
| Ascensione retta: | 16h06m01.21s |
| Declinazione: | -08°46'14.1" |
| Magnitudine apparente: | 7.937 |
| Distanza: | 167.785 parsec |
| Moto proprio RA: | 3 |
| Moto proprio Dec: | -63 |
| B-T magnitude: | 9.377 |
| V-T magnitude: | 8.056 |
Cataloghi e designazioni:
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