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SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
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| The Perkins catalog of revised MK types for the cooler stars
A catalog is presented listing the spectral types of the G, K, M, and Sstars that have been classified at the Perkins Observatory in therevised MK system. Extensive comparisons have been made to ensureconsistency between the MK spectral types of stars in the Northern andSouthern Hemispheres. Different classification spectrograms have beengradually improved in spite of some inherent limitations. In thecatalog, the full subclasses used are the following: G0, G5, G8, K0, K1,K2, K3, K4, K5, M0, M1, M2, M3, M4, M5, M6, M7, and M8. Theirregularities are the price paid for keeping the general scheme of theoriginal Henry Draper classification.
| Recognition and classification of strong-CN giants
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Osservazione e dati astrometrici
| Costellazione: | Idra |
| Ascensione retta: | 12h35m35.15s |
| Declinazione: | -30°05'05.1" |
| Magnitudine apparente: | 8.261 |
| Distanza: | 240.385 parsec |
| Moto proprio RA: | 7 |
| Moto proprio Dec: | -0.8 |
| B-T magnitude: | 9.76 |
| V-T magnitude: | 8.385 |
Cataloghi e designazioni:
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