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Supplement to the Second Catalogue of Am Stars with Known Spectral Types (end 1981)
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| Visual multiples. VII - MK classifications
Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound that at least 1% of the F-type IV and V stars are weak-lined, 32%of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Vergine |
| Ascensione retta: | 14h19m25.80s |
| Declinazione: | -18°31'25.1" |
| Magnitudine apparente: | 7.315 |
| Distanza: | 131.579 parsec |
| Moto proprio RA: | -54 |
| Moto proprio Dec: | -12 |
| B-T magnitude: | 7.698 |
| V-T magnitude: | 7.347 |
Cataloghi e designazioni:
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