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Geneva intrinsic colours of the supergiants of spectral types A and F
The aim of this research note is to expose a photometric method todetermine the intrinsic values of the Geneva color index (B2-V1) for thesupergiants of spectral types A and F. The different stages which led tothis objective are presented, and the method is tested with a few starsbelonging to clusters for which color excesses were found in theliterature. A list of stars classified as supergiants which behavephotometrically as dwarfs is indicated.
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Osservazione e dati astrometrici
| Costellazione: | Balena |
| Ascensione retta: | 02h52m00.45s |
| Declinazione: | +01°17'26.7" |
| Magnitudine apparente: | 9.171 |
| Moto proprio RA: | 22.9 |
| Moto proprio Dec: | 5.7 |
| B-T magnitude: | 9.622 |
| V-T magnitude: | 9.209 |
Cataloghi e designazioni:
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