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Micrometer Measures of Double Stars
Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.
| 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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Osservazione e dati astrometrici
| Costellazione: | Leone |
| Ascensione retta: | 11h36m14.61s |
| Declinazione: | +03°18'04.0" |
| Magnitudine apparente: | 7.196 |
| Distanza: | 215.517 parsec |
| Moto proprio RA: | -32.2 |
| Moto proprio Dec: | -39.7 |
| B-T magnitude: | 8.381 |
| V-T magnitude: | 7.294 |
Cataloghi e designazioni:
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