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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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Посматрања и Астрометриски подаци
| Сазвежђа: | Лира |
| Ректацензија: | 19h14m13.67s |
| Deклинација: | +34°12'54.4" |
| Apparent магнитуда: | 7.675 |
| Даљина: | 543.478 parsecs |
| Proper motion RA: | 2.2 |
| Proper motion Dec: | -4.9 |
| B-T magnitude: | 7.593 |
| V-T magnitude: | 7.669 |
Каталог и designations:
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INHABITED SKY
